Alternator. Battery is not dying yet. Without a regulator the battery would receive upwards of 30-volts of power while … Just because it's new doesn't mean it isn't bad. This fluctuation with the RVC system is normal system operation and NO repairs should be attempted. It will fluctuate for "gas mileage" normal on 05-current . Electric Accessory Issues. If it passes the test, it’s time to move on to the alternator. If the battery is draining while you’re driving, that is probably going to be the alternator or battery. Now while driving my voltage drops from 14.6 to 12.5 volts all systems checked with the computer but everything is normal. My 2008 Tahoe LTZ just started with the voltage staying constant at 15.2-15.4 volts. If your Silverado’s battery light came on while you were driving, but before you parked, it could be the alternator. Devin 2006 Silverado 2500 HD CCSB LT3 LBZ, Black/Black PPE Programmer (set to level 3), nothin' more but hopes and dreams. Low running voltage; ECU alternator bypass in a 98? If your battery is draining while driving, it is almost without exception the Silverado’s alternator that is causing the problem. Any suggestions guys? For some, a constant 13.6 volts is an indication of a problem. Chevy GM Silverado and Sierra (RVC) Regulating voltage controller systems. You’ll want to take a look at your Silverado’s battery posts where they bolt to the battery. The opposite happens when voltage levels read too high. Conducting a Voltage Drop Test. Maybe one of the map lights is on? This is one video subject I haven't seen yet so here it is. This will cause the voltmeter to fluctuate between 12 and 14 volts as opposed to non-regulated systems that usually maintain a more consistent reading of 14 volts. Though the regulator is designed to protect electrical components of the vehicle, sometimes it does fail. From buying research to owner support, join 1.5 MILLION GM … If you hear a whining noise accompanied by the battery light, it’s almost guaranteed that it’s the alternator that is at fault. In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. Jeff Borowski, 2011 Silverado, 1500, 4X4, EXT Cab, 8' box, Red. Step 2: Set up DVOM to measure DC voltage. The voltage of the battery on your Chevy Silverado 2500 HD can be measured precisely with a multimeter. just got an 09 chevy silverado ls and the voltage goes from 14.6 to 12.7 and i took it to a mechanic they said it was normal on thoes truck … read more Michael Moore The generator may exit "Fuel Economy Mode" if additional voltage is required. In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. If the fuel mixture is burning rich, less oxygen will be present in the exhaust and the voltage will be above 0.45 volts, up to 0.9 volts. Amperes is the measurement for current. The generator may exit "Fuel Economy Mode" if additional voltage is required. If I am stopping at a red light, the voltage will drop (but not enough to cause the engine to cutout, yet!) The key to long life for any battery is to make sure battery voltage doesn't drop below 12.4 volts. This fluctuation with the RVC system is normal system operation and NO repairs should be attempted. Sealed maintenance free batteries are normally 14.5-15.4V running Low maintenance batteries 13.2-14.7V is normal. Once again, it wouldn't start. From buying research to owner support, join 1.5 MILLION GM … The car’s frame is connected to ground, so look for an unpainted piece of the frame under the hood. Current is a different story. Amperes is the measurement for current. The "normal" charging voltage on a typical application might be 13.9 to 15.1 volts at 77 degrees F. But at 20 degrees F. below zero, the charging voltage might be 14.9 to 15.8 volts. We’ll cover those for you below. Then they reprogrammed the Body Control Module and found that it was always reporting that the battery was dead. When that happens, sulfation begins to diminish both capacity and performance. If there is anything you would like to add, please feel free to leave a comment below. This Test Mainly Rules out your alternator and test its strength. Starting with the 2005 model year, light duty full size pickups and utilities are equipped with a new Regulated Voltage Control (RVC) system. Aftermarket dash unit/screen w/ backup batter was installed ... SilveradoSierra.com - Chevy Truck Forum | Silverado Sierra GMC Truck Forums The only site focused on Silverado/Sierra trucks exclusively. If your Chevy Silverado’s battery is draining, it’s something that’ll need addressing right away. the guage on my 2000 silverado and the 2002 stays at the 14 volt point with the engine running and very rarely moves off this reading. The regulator backs off and allows for the voltage to wind down until it is back within its normal range. GM Instrument Cluster Recall / Settlement Information and Vehicle Coverage I took it into the dealer yesterday, and they replaced all the battery cables per a … voltage truck make back alternator still high silverado issues problem miles getting issue trucks right help using light first, Users browsing this forum: No registered users and 25 guests, charging system alternator battery voltage high. This truck Fuel Level Sensor Ckt is in tact and functioning. This video will explain why! The ideal car battery voltage range will provide you with a relevant interval according to which you can measure precisely what the voltage says about the battery’s current charge. checking the voltage, usually results in values of approx. Mechanic's Assistant: What is the make/model/year of your car? razzell2 0 razzell2 0 New Member; Member; 0 4 posts; Name: Russell; Location: High Desert, Ca; Gender: Male; Drives: 2006 Silverado Crew Cab LT; Posted November 16, 2017 (edited) I will try to be … If it is you should see the battery or alternator light on, it indicates that the alternator is not creating the necessary voltage to charge the battery. I have a 2003 Chevy Silverado 2500. Then it goes up to 14.5-15 volts like normal in quite a hurry. If the voltage dips below the optimal range, then the regulator kicks in to get the alternator to make more voltage. Aftermarket dash unit/screen w/ backup batter was installed in June 2014. And then come back up to normal. If it is you should see the battery or alternator light on, it indicates that the alternator is not creating the necessary voltage to charge the battery. They’ll need to charge it for a while, so plan on dropping it off and returning a few hours later. The "normal" charging voltage on a typical application might be 13.9 to 15.1 volts at 77 degrees F. But at 20 degrees F. below zero, the charging voltage might be 14.9 to 15.8 volts. If your battery is draining while driving, it is almost without exception the Silverado’s alternator that is causing the problem. The key to long life for any battery is to make sure battery voltage doesn't drop below 12.4 volts. Even though you alternator tested good as far as charging it sound like the voltage regulator is erratic. Is your silverado or sierra showing low or high battery voltage? Link to post Share on other sites. 12 to 13 volts. The oxygen sensor immediately reports the change so that the less fuel the PCM injects into the engine, the smaller the voltage that the O2 sensor's voltage produces. Show Less. I took it into the dealer yesterday, and they replaced all the battery cables per a TSB but it did not correct the problem. They are usually less than 10 bucks at the local parts store or Wal-Mart. 13 -14v is the average alternator output. Battery Draining While Driving: Chevy Silverado. Radical voltage levels on all automotive electronics / electrical items will cause premature component failures. Something is drawing power when it shouldn’t be. Calculating Total Circuit Voltage Drop 1) Add positive circuit loss and negative circuit loss to get total system loss. There are trouble codes that are associated with the TPS. When a battery is going bad, I've noticed that even after a long drive the voltage is still up there. 2014-2018 Silverado & Sierra Troubleshooting ; Voltage gauge normal reading Facebook; YouTube; Twitter; Sign up for FREE! If it is draining while your Silverado is off, it’s usually caused by something that is drawing current that shouldn’t be. It just trying to keep the voltage produced by alternator on the same level, not higher than some value, let say 13.7 volts. A voltage regulator helps regulate the voltage that an alternator provides. In this video we have this Chevrolet Silverado that has a battery drain. Voltage when the car is running. The battery ground was to the frame, and there was a separate jumper wire from the frame to the engine block The charging system in the engine used the engine block as it's 'ground' reference - and produced a reasonable 12.5 - 13.5V average charge voltage. This will cause the voltmeter to fluctuate between 12 and 14 volts as opposed to non-regulated systems that usually maintain a more consistent reading of 14 volts. If you get normal voltage at KOEO (it means all 6 modules in splice 2 bar are OK. Use the lowest range possible if the meter doesn’t auto range. Well I have an '05 Silverado, V8, 5.3L (gas only) Automatic, 4WD Since I bought the truck the voltage meter on my dash always holds right in the middle at 14. Higher than normal voltage. But it’s not very likely. Normal voltage reading for wide open throttle (WOT) is above 4.00 volts. Normal. When the battery drains when parked, the odds are that it’s the battery itself. Perfectly normal. The combination of a significant parasitic draw and long periods of non-use can easily cause voltage to drop below 12.4 volts. What have you tried so far? There are also specific battery post cleaners that you can buy. The contact stated no warning light was illuminated. Perfectly normal. Mechanic's Assistant: Are you fixing your Silverado 1500 yourself? When your car is running the cars alternator is charging the battery, this is why you should see a higher voltage. A perfect voltage with the engine running is between 13.7 and 14.7V. For some alternators, it's normal to see as low as 13 volts. Perfectly normal. It's brand new. If your Silverado’s battery is draining after being parked for a few days, here are two possible scenarios. FAST 'N FREE. It constantly compares that value to the system voltage. Re: Alternator Voltage Issues (high voltage), Low Voltage, Aftermarket alternator, dual new batteries '11. Show More. Replaced the battery, started fine. Hello everything glad to have joined the forum.i own a 2001 chevy silverado 2500hd ive been experiencing a problem with my voltage gauge on the dash constantly jumping between 14-18 ive noticed it sometimes stops when at idle and doesnt do it as … This loss shall not exceed: 12-volt system: 0.500 volts maximum voltage loss; 24-volt system: 1.000 volts maximum voltage loss; 2) Replace cables or repair circuits with excessive voltage … I own a chevy 2007 silverado and I put in a new battery and alternator. when the alternator regulator started to go the voltage would drop to just above 12 volts then jump back to 14volts. It is also my understanding that the ECM is controlling the alternator voltage. The alternator is under warranty. And then come back up to normal. FL335i 306 FL335i 306 Enthusiast; Member; 306 967 posts; Posted March 12, 2017. If you didn’t see a battery light, and now the vehicle is dead when you go to start it, the first thing that you need to look at is the battery. The contact stated while driving 35 mph, the vehicle radio and dash light were clicking off and on, which caused the vehicle stalled after making a left turn. For a Battery you will need a batter load tester. So before you all tell me all about the crappy fuel level sensors on these trucks….. charging system alternator battery voltage high - I'm having a problem with my charging system. If you’re readings are significantly higher or lower than these then it would indicate a fault with the battery and/or the alternator. This is considered a Lean Condition. Many accessories in a vehicle require quite a bit of voltage. The truck is a 2005 Silverado with a 5.3L engine (4WD) with about 75,000 miles. For wide-band O2 sensors and linear O2 sensors, the value may be higher, or it may be converted to a zero to one volt scale. Here’s a pretty good video on exactly how to track down a “parasitic draw”. I also have a 2011 Silverado. 8L90E Specs, Performance, and Identification, TH400 Transmission Specs, ID, and Common Problems, Chevy Impala: Brake Lights Stuck On → Diagnosis. So could it be a bad voltage regulator ? Free shipping. Most parts stores can test an alternator for you. If your vehicle is running fine when you park it, and it won’t start, there could be a few problems causing this to happen. I'm having a problem with my charging system. If your Silverado is equipped with a glove compartment light, check and see if it is turning off. On a hot engine on a hot day, the normal charging voltage might drop to 13.5 to 14.3 volts. "A voltage drop test is a good ‘best practice’ during your scheduled preventative maintenance or before replacing the battery, starter or alternator," explains Clint Stohler, Director, Technical Service and Training. Ideally, the GM alternator should be putting out anywhere between 13.5 and 14.5 volts. I get 2.8 volts at the sensor signal wire of PCM C2 pin 54. This fluctuation with the RVC system is normal system operation and NO repairs should be attempted. It's a 2011 Silverado LS 4WD 4.8L. If system voltage is lower regulator connects the wire of the rotating coil to the current source. Higher than Usual Voltage . Ask Your Own Chevy Question. This system reduces the targeted output of the generator to 12.6-13.1 volts when in "Fuel Economy Mode" to improve fuel economy. 2014 Silverado 1500 4x4 5.3l. Most of the time, it’s the battery itself causing this problem. Heated seats, the blower motor, power windows, and even the radio will work erratically or not work at all when the alternator is bad. Power Engine Turbo Voltage Boost Regulator ECU Performance Chip for Ford F150 (Fits: Chevrolet Silverado 1500) $39.32. Successful testing of the car battery, i.e. The variation in voltage could cause strange things to happen. Using a dc volt meter measure the alternator output voltage, compare with the dash guage. Battery Draining While Driving: Chevy Silverado. have a 2012 chevy silverado 5.3 charging system tests good owner complaint is when driving battery voltage gauge holding just over 14v and will drop to about 12v and hold there after a while it will come back up to normal then drop again does not matter if … No issues known with this. If it is you should see the battery or alternator light on, it indicates that the alternator is not creating the necessary voltage to charge the battery. Scan tool EVAP data shows corresponding voltage. One c ode will set if the TPS voltage is too high when the computer expects to see it lower. For some, a constant 13.6 volts is an indication of a problem. Lately, it has even been dropping during normal driving. If not, it may be that there is an electrical problem. The truck is a 2005 Silverado with a 5.3L engine (4WD) with about 75,000 miles. However, even when I just slow down and start turning the voltage will drop, then come back up to 14. If the battery isn’t fully charged, it will diminish to 12.4V at 75%, 12V when it’s only operating at 25%, and down to 11.9V when it’s completely discharged. It'll go up and down as needed. You can take it up to the local parts store and have it tested. The battery was completely dead, and it would not even start with a jump. My 2008 Tahoe LTZ just started with the voltage staying constant at 15.2-15.4 volts. 1500 Silverado normal voltage meter readings. Battery has low voltage, then goes normal. The alternator isn't even 6 weeks old, and voltage regulator is built in. There are other situations as well. Fuel Level Low Indicator . It constantly compares that value to the system voltage. Now while driving my voltage drops from 14.6 to 12.5 volts all systems checked with the computer but everything is normal. Simply put, the regulator restricts the amount of voltage being sent to the battery. It has the factory battery still with 48,000 miles on it. 14.8V is considered overcharging. If your battery is draining while driving, it is almost without exception the Silverado’s alternator that is causing the problem. Become a GM-Trucks.com Member Today! I've noticed my dash voltmeter reading over 14 volts, so I put my Fluke DVM across the battery.... reading 15.05 volts.... Kind of high in my view, but I believe the voltage is controlled by the ECM. It is possible that the alternator wasn’t charging the battery enough when the vehicle was running and has left the battery drained. The voltage, when the engine is running, should be in the range of 13.5-14.7 volts. Quote; Share this post. Its voltage can go as low as 0.050 to 0.100 Volts. When that happens, sulfation begins … A perfect voltage with the engine running is between 13.7 and 14.7V. 2004 Chevrolet Silverado 1500 LS 5.3L (T LM7) 4-spd (4L60-E) — 2GCEK13T841326845. The regulator doesn't care about your battery. ... 2015 Chevy Silverado 2500 HD 6.6L LML. Any suggestions guys? Changed alternator - Answered by a verified Chevy Mechanic. For some alternators, it's normal to see as low as 13 volts. What can cause his porbelm. A bad regulator over charging would most like shoot upwards of 16.0V. If this is the case, the first thing that you are going to want to look at is all of the lights. My trck ran 8 years always charching around 14.2 volts … read more Depending on the load on the electrical system, anything higher than battery voltage is good voltage for a vehicle. With the truck off 12.6V is normal. Normal voltage reading for wide open throttle (WOT) is above 4.00 volts. 13 -14v is the average alternator output. What can cause his porbelm. They’ll tell you if it holds a charge or not. This will cause the voltmeter to fluctuate between 12 and 14 volts as opposed to non-regulated systems that usually maintain a more consistent reading of 14 volts. The charging voltage at the + side of the battery was up to 16.5 - 17.0 V. WAY too high. The voltage regulator is built into the alternator on all Chevys made from the 1980s to at least 2010. The combination of a significant parasitic draw and long periods of non-use can easily cause voltage to drop below 12.4 volts. On a normal operating O2 sensor you should see the voltage bounce around quite a bit from rich to lean. If there is a lot of corrosion here, you’re going to want to clean that off with a wire brush. This system reduces the targeted output of the generator to 12.6-13.1 volts when in "Fuel Economy Mode" to improve fuel economy. The voltage with closed throttle should be between 0.400 and 0.625 volts for most applications (check appropriate reference guides for your application’s specified voltage range). )Connect S1 and disconnect S2, all 5 modules on splice 1 bar is cut off. I own a chevy 2007 silverado and I put in a new battery and alternator. Starting with the 2005 model year, light duty full size pickups and utilities are equipped with a new Regulated Voltage Control (RVC) system. What Does Code P0523 Mean? For others, it's normal to see as high as 16 volts for long stretches. The regulator doesn't care about your battery. Facebook; YouTube; Twitter; Sign up for FREE! Save Share. ... Could this be a voltage regulator going out on the alternator or should I look for a short? We recommend Torque Pro. 1999-2013 Silverado & Sierra 1500 ; Is It Normal For The Voltage To Fluctuate? 12.6v is the optimal battery voltage. Step 3: Touch the negative lead of the DVOM to a ground source. But, if it’s a system that’s supposed to have full charging voltage, such as a 12.5-volt or 14.5-volt system, and the engine’s running the fuel pump in order to make the right amount of fuel to go into the engine with a particular pulse width on the injectors, then it needs to have the correct voltage supplied to it. If the voltage you get is not within spec, loosen the TPS retaining screws and adjust as necessary. The generator may exit "Fuel Economy Mode" if additional voltage is required. Higher than normal voltage ... Higher than normal voltage. But last week I noticed that it was moving around just a little, most people probably wouldn't have even noticed. GM has been doing computer-controlled alternator output for like 10 years. With the engine off, you should get a reading of 12.6 volts. As your Silverado begins to eat through the voltage stored in the battery, the headlights will begin to fade. Normal voltage reading should be 5-7 volts.If not, the DLC connections from pin 1 to S1 is no good. By razzell2, November 16, 2017 in 1999-2013 Silverado & Sierra 1500. silverado; voltmeter; Reply to this topic; Start new topic; Recommended Posts. On a hot engine on a hot day, the normal charging voltage might drop to 13.5 to 14.3 volts. Is something plugged into one of them and drawing power? They usually don’t charge anything for this service, they just want to sell you an alternator if you need it. Another code will set if the TPS voltage is lower than the computer expects to see. The targeted voltage in these system ranges from 12.6-13.1 volts when the system is in “Fuel Economy Mode.” As soon as the PCM detects that the system needs additional power generation, it exist this mode and moves into “Charge Mode” at normal charging rates. Become a GM-Trucks.com Member Today! Yeah then I'd definitely take it back to where you got it and tell them what's happening and see if they will give you a new one. How about all of the accessory plugs? Tl- the contact owns a 2015 Chevrolet silverado. My trck ran 8 years always charching around 14.2 volts … read more If system voltage is lower regulator connects the wire of the rotating coil to the current source. If I am stopping at a red light, the voltage will drop (but not enough to cause the engine to cutout, yet!) Still, it's perfectly normal for others to see the alternator not charge at all intermittently. 3 This system reduces the targeted output of the generator to 12.6-13.1 volts when in "Fuel Economy Mode" to improve fuel economy. Current is a different story. The battery itself has gone bad and just can’t hold a charge long enough to be of any use after the vehicle sits, and it drains. With the engine off, you should get a reading of 12.6 volts. A high voltage reading, typically above 15 volts, indicates a problem. For Chevrolet Silverado 1500 Voltage Regulator Connector AC Delco 85611CK (Fits: Chevrolet Silverado 1500) $32.67. It could be a bad battery, or more likely a bad battery cable too. 2014 Silverado 1500 4x4 5.3l. 2014 Silverado 1500 4x4 5.3l. ... i just want the darn guage to read normal and to have the lights stop diming. OBD II fault code P0523 is a generic code that is defined as “Engine oil pressure sensor/switch -high voltage”, and is set when the PCM (Powertrain Control Module) detects either an actual low oil pressure condition, or a high voltage in the oil pressure switch and/or its control circuit. Changed alternator. "One volt drop generally equals a loss of 30 engine cranking rpms." Depending on the load on the electrical system, anything higher than battery voltage is good voltage for a vehicle. 2. Any aftermarket accessories? 12.6v is the optimal battery voltage. We use cookies to give you the best possible experience on our website. Higher than normal voltage. Doesn't drop down after say 30 minutes of driving the hwy like it normally does. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Before the test, the multimeter is set to the voltage range of the battery and connected to its plus and minus poles. It's a 2011 Silverado LS 4WD 4.8L. Starting with the 2005 model year, light duty full size pickups and utilities are equipped with a new Regulated Voltage Control (RVC) system. Share … Good luck running down what is causing your battery to drain in your Chevy Silverado. For others, it's normal to see as high as 16 volts for long stretches. O2 Sensor Output Voltage-- The actual voltage being generated by the oxygen sensor (should be 0.1 to 1.0 volts for a conventional zirconia O2 sensor). Still, it's perfectly normal for others to see the alternator not charge at all intermittently. It just trying to keep the voltage produced by alternator on the same level, not higher than some value, let say 13.7 volts.
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