Delco Remy is a registered trademark of General Motors Corporation licensed to BorgWarner PDS (Anderson) L.L.C. Unfortunately in my '98 the voltage regulator is in the PCM. Play. A voltage drop of .25 volts or less is Ok and the alternator is bad. If I shut the car off while at operating temperature and turn it back on again the voltage is low. I changed the alternator recently, probably has less than 7-8k miles on it. Connect negative lead to the ground stud on the starter. Any suggestions guys? stock battery up front 2 1/0 runs to the rear. (But still no solution). I know I have an aftermarket fan controller. When driving, I've seen the battery voltage around 13.7-13.9v and steady, however other times I've noticed it tapers down (never just drops or … If I am stopping at a red light, the voltage will drop (but not enough to cause the engine to cutout, yet!) Battery gauge drops while driving. To get a true voltage reading of the cars battery it is important to measure the voltage after the car has been sat for a period with the engine off, preferably overnight, this provides you with the “car battery open circuit voltage” or also know as the “resting voltage”. I Feels As If It Is Shaking. I will keep fingers crossed and hope for the best. We rechecked all the grounds, all good. Your problem was intermittent from the start so any test would have been inconclusive. Check your grounds on left side of engine block and ground for ECM. The battery is fully charged so the system drops the voltage to 12 volts. There is a very big difference when a car battery drops even a small amount of voltage. Has anyone experienced a similar issue with their vehicle? Light was off for one day then back on. Looked down at my gauges, battery light illuminated and voltage gauge close to 8 volts. Battery Draining While Driving: Chevy Colorado. So I put them on today and so far so good the battery light in message center went out and stayed out. Unless it is a specific recall. Other than that recheck the battery because they can have a bad one even if new. This loss shall not exceed: 2) Replace cables or repair circuits with excessive voltage loss. The only thing I can think of here is to check the ground for the PCM as the PCM tells it to charge or not. The 2012 Cadillac SRX has 1 problems reported for battery voltage drops while driving. Initially I thought maybe my battery (bought a new one), then the alternator (had it checked several times), then possibly a vacuum leak off the brake power booster. This is the negative circuit voltage loss. The truck is a 2005 Silverado with a 5.3L engine (4WD) with about 75,000 miles. I kept checking grounds and everything else and all was fine so I decided to try a new alternator and belt from AutoZone even though the others checked out okay. 5)  With the engine at 1,500 to 2,000 rpm, turn on all electrical loads (lights, blower fan, A/C, etc.). One other thing is to check the battery junction box for loose or cut wires near engine on left hand side. Suppose your battery is of the lead-acid type (not gel … One other thing is to check the battery junction box for loose or cut wires near engine on left hand side. Copyright © 2021 BorgWarner Inc. All rights reserved. Hi, And then come back up to normal. I'm going to go to Autozone tomorrow and have them check the voltage output of my alternator and battery to see if one … But if it is under recall it should be fixed no charge. 1)  With the voltmeter connected to battery, and key and engine off, record a "base" voltage reading. Most so called 12v accessories (phone chargers,etc) are designed actually work on around 14v in reality, because that's the voltage in the cars wiring loom when it's running. The higher the reading in each circuit, the bigger the problem. As soon as I turned off the AC, battery gauge immediately went back up to 13 volts and light went out. High resistance is often caused by one of these four main issues: While a technician may regularly do a visual inspection of cables and connections it doesn’t really show what is going on inside the cables or inside the connections. My car was acting the same way today. However, even when I just slow down and start turning the voltage will drop, then come back up to 14. If I cold start the car the voltage seems perfect. To charge it you need a higher voltage so the alternator puts out about 14v to do it. She took the car to Autozone where they tested the battery and alternator and said both were fine. Also, check the pink wires on the body relay box under left hand side of dash. First I had the battery light flash in message center and voltage was at 14.7 and took to AutoZone and replaced battery. I know most people on here do not come back to tell your out come, and how will we ever know what works ! hide. 3)  Turn on and adjust the carbon pile to alternator-rated amperage output. (Your battery should have a minimum of 12.4 volts.) Download our Delco Remy Resource Library from the App Store for easy access to our resources. I replaced the battery and so far every is fine except I'm getting a reading of 12.5 volts. 8. www.delcoremy.com/the-latest/2013/june/tech-tip-checking-voltage-drops \. It's not uncommon for an alternator or starter to be replaced because it’s believed to be faulty or run its normal life cycle... only to later discover that the root cause of the problem doesn’t reside with the alternator or starter. But the problem still persisted. Make sure your battery terminals are clean, if you have the side post type which you do the bolt gets corrosion behind it and does not make good contact. Yesterday while driving I had the same thing happen again where the gauge would drop to zero, and it happened again today as well. So while you are driving around like this you are NOT discharging the battery. At first I noticed mostly when maneuvering in the parking garage - braking and turning. Voltmeter (-) test lead to the battery (+) post. Once the engine is turned off, the measured terminal voltage immediately drops to the battery voltage of around 13v if it was fully charged but most likely a little lower. Voltmeter (–) test lead to battery (–) post. We rechecked the battery and terminals, all clean and good, rechecked the alternator and voltage regulator, all checked fine. While the RVC system does reduce the generator's targeted output voltage to 12.6-13.1 volts when in "Fuel Economy Mode", this feature is bypassed if the tow/haul feature is enabled. Cleaned the mass air flow sensor, all good. The battery condition is not related to the voltage guage unless it is really shot, and we can see this is not the case. I have 39,000 miles on it. Immediately turn off carbon pile. Battery gauge low and drops while driving. The charging voltage should be at least 0.5 volt above base voltage reading. I have a 2012 Chevy Cruze, bought in April 2012, that I'm wondering if it's just having battery issues or alternator problems. Close. When comparing your car battery’s voltage measurements with the normal battery voltage range for that specific type of battery, you can learn a … I replaced the battery and so far every is fine except I'm getting a reading of 12.5 volts. There is not recall for a dash cluster on that vehicle and there never would be. So my battery died last night and the alternator was not charging it at all. My voltage started dropping from 14 to 10 at times, causing the engine to cutout. save. If your battery is draining while driving, it is almost without exception the Colorado’s alternator that is causing the problem. Now I read 21 volts. I have an explanation. Hello, I just bought a new 2016 Traverse 1LT and I have had it for a few weeks now. With the tow/haul feature enabled, the RVC system will stay in "Charge Mode" and the targeted generator output voltage will be 13.9-15.5 volts, depending on the battery state of charge and the estimated battery … The battery voltage will jump around from 14.7 down to 12.8 at various times. Higher Output Ratings Announced for 40SI and 55SI, Tech Tip: Mounting Holes on Newer All-Makes Starters, BorgWarner Refrigeration Program Keeps Critical Components Moving. The ignition coil turns the battery's low voltage to the thousands of volts needed to create an electric spark in the spark plugs, which ignite the fuel. No problems there. Thursday, February 23rd, 2012 AT 11:11 PM. 0:00. Otherwise you will need a tech 2 put on it and normally dealers only have that. With the tow/haul feature enabled, the RVC system will stay in "Charge Mode" and the targeted generator output voltage will be 13.9-15.5 volts, depending on the battery state of charge and the estimated battery … The alternator, which runs when the engine is running, can produce up to about 14 Volts to force a charging current into the battery. The battery is fully charged so the system drops the voltage to 12 volts. https://www.modernthrill.com/2019/causes-of-overnight-car-battery-voltage-drop So while you are driving around like this you are NOT discharging the battery. 2)  Turn on and adjust the carbon pile to alternator-rated amperage output. Seems to me it could very well be a slipping belt and or the alternator in your case. Voltmeter (+) test lead to the alternator output terminal. My car was acting the same way today. Over the last few years I have had fairly short battery life, a couple of years each, with decent batteries. Took a 3 hour trip out and back last Saturday and noticed that while driving the battery voltage was between 12.8-12.9; it is 14.4-14.6 when the car is just started. Curious thing i noticed with my 2006 dts LIII. Average failure mileage is 43,800 miles. 1)  Add positive circuit loss and negative circuit loss to get total system loss. The good news the power came back and all was well with the world once again. ... Last … If not, excessive resistance could be present. Either you have something kicking in and causing a major draw, or a bad voltage regulator. The current battery is getting weak after only ear or so, so I checked the running voltage, ~14.5, but then I had the though to keep the meter on while driving. Ensure the vehicle’s batteries have been tested and that the terminals have been cleaned and tightened. Engine started running fine. Of course your gauge could be wrong as well. EXPERT. GM typically runs a fusible link wire between them for overload protection and they can go bad, mimicking a bad alternator. Q: Ford 302 c.u. 1)  With the carbon pile tester still connected, connect the voltmeter to the negative battery cable. The computer is constantly monitoring the battery voltage and as soon as the battery is charged, the alternator output drops down to match the current load on the system and it is no longer trying to charge a fully charged battery. Hey, I am back to offer a suggestion. However, if I give it a quick rev above 3.5k or so, the battery quickly charges to 14volts and then it is good for the rest of the drive. If it is less than 12.4 volts, charge the battery and repeat the test. As well as ignition 1 fuse. A good fully charged battery should read ~12v and not drop below 10v over the period of 15sec while cranking. When your car is running the cars alternator is charging the battery, this is why you should see a higher voltage. As well as ignition 1 fuse. When a car drops, for instance, from 12.6 to 12.0, there will be 75% difference. 3)  To remove surface charge, turn on the headlights and blower motor (high speed) for one minute. Low Voltage Disconnect and Inverter. Wednesday, December 28th, 2011 AT 12:06 AM. 91% Upvoted. Low fluid levels in the battery. The voltage, when the engine is running, should be in the range of 13.5-14.7 volts. However, while it is possible to fully charge a battery off an alternator, because the rate of charge declines as the voltage in thebattery approaches that of the charging system, it rarely exceeds about 70 to 75 per cent, even after a full day’s driving. You can verify this by checking the voltage in both batteries with a multimeter. Also, check the pink wires on the body relay box under left hand side of dash. So after checking so many things, I came across this suggestion on another blog. Voltmeter (+) test lead to the battery (-) post. When my car voltage was dropped to 12 volts when I was driving, I just turn on my headlights and the voltage went back up to 14.23 volts. For instance if your readings showed .2 volts loss on the positive circuit and .7 volts loss on the negative circuit, the technician needs to focus on the negative circuit. 1-. ", A voltage drop test will assess voltage losses at the battery, the alternator and the starter. should be 13.8-14.+ – agentp Feb 1 '17 at 4:20. If you have voltage fluctuations while the engine is running it is an indicator of a problem with the charging circuit, or a major short. Connect negative lead to the ground at the alternator. Posted by 13 days ago.
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