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Yesterday I noticed that the battery light stayed on while driving to work. I then looked at the battery charge gauge and it roughly was at about 18 volts. I made it back home and didn't think anything was wrong. Today I drove my stroke around the block looking for my wife's escapee terriers and I noticed that the gauge was hovering around 10volts. I made it home and pulled out my trusty volt meter to check the batteries. Both batteries are reading about 11.8 volts. I went ahead and cleaned both cables. I started my truck back up and the battery volt cauge is still hovering around 10 volts. Anybody out there have any idea what could be causing this? also I have full power in the truck meaning my lights are perfectly bright and the stereo works just fine.
Yesterday I noticed that the battery light stayed on while driving to work. I then looked at the battery charge gauge and it roughly was at about 18 volts. I made it back home and didn't think anything was wrong. Today I drove my stroke around the block looking for my wife's escapee terriers and I noticed that the gauge was hovering around 10volts. I made it home and pulled out my trusty volt meter to check the batteries. Both batteries are reading about 11.8 volts. I went ahead and cleaned both cables. I started my truck back up and the battery volt cauge is still hovering around 10 volts. Anybody out there have any idea what could be causing this? also I have full power in the truck meaning my lights are perfectly bright and the stereo works just fine.
Ouch! 18volts is too high for charging. Can u verify that with a voltmeter. A good battery shows 12.5 volts alone and about 14.5 volts while engine running.
U may need a new regulator.
Replace your alternator before you boil your batteries dry. They are most likely suffering heavily as it is. 18 volts is WAY to high. I agree with PSnut, 14.5 max is what you should see.
Sounds like the voltage regulator in the alternator. If you can spare the downtime on the truck and want to save some money, take your alternator to a place/shop that rebuilds alternators, starters, etc. Have them repair it and also ask them to check it out throughly and give you a price on any improvements they can do to it. Most of those places can "bullit proof" it with better bearings, etc. If they can reasonably priced increase the output to 140-145 amps, that would also be worth it. You'll get a better alternator out of it than you will buying a re-man from some discount auto place and for alot less money.
If you can't wait on rebuilding an alternator, get at least a 130 amp output alternator. From what I've read, many places will try to sell you a 110 amp and you're better off with the 130. You don't need a 150+ amp unless your running alot of lights and add-on stuff, like an ambulance or tow truck.
I agree alternator as well, but I also feel inclined to mention that you can get a new 200A alternator for just over 200 bucks, there is also some 110A there as well, but I agree 110A seems small. I really like the idea of having is custom rebuilt. 150A would suit my wants perfect.
Guys I had an alternator shop build me a 150 amp for the tune of $180 and replaced my cheap Walmart batteries with two Optimas. The light went back out. thanks for all the info!
Guys I had an alternator shop build me a 150 amp for the tune of $180 and replaced my cheap Walmart batteries with two Optimas. The light went back out. thanks for all the info!
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