Last post on Nov 26, 2013 at 1:42 PM
You are in the Chevrolet S-10 & GMC S15 Sonoma
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Chevrolet S-10, GMC S-15, GMC Sonoma, Electrical, Truck
Oct 19, 2011 (7:07 am)
i left the key on overnight and had a dead battery, i put the charger on it without disconnecting batt., then started it, with charger still hooked up, i think i killed my alternator, when truck is running, and i take the neg. batt. cable off it shuts down. battery light is on, guages failed, i needed a new batt. anyway, so i bought one, the guages work, 4 now, i drove to work, but left it there, so i didnt have to drive home at night using lights. seems like alt., but i would hate to buy and install, and find out its a brain, or wire harness, or something. any advice is appreciated. chevy s10 2000
#416 of 444 Re: fried [hamerdown]
Oct 19, 2011 (8:08 am)
First, NEVER, ever connect a battery charger to a automobile with battery cables connected as the amperage from charger is much different thatn that of the charging system. You said that while truck is running you disconn the neg. cable and it dies...do the same thing but disconnect the pos. Does it die? Do you have a voltmeter? If you do, start the truck and check voltage at the battery (black lead to neg. cable, red to positive) Your charging system should be putting out 13.8-14.5 volts. If it is not, replace the alternator. Also, most parts stores will test your alternator for free....simply remove the alternator and they will put it in a carbo load tester with a "pass/fail" result. This does sound like an alternator issue. If it where a harness or computer you would get a check engine light and other systems of the truck would not work. Feel free to email me should you need furher assistance. kngjmz.1gmail.com
#417 of 444 Re: Sonoma ELECTRICAL ISSUES [jfogelberg]
Oct 20, 2011 (7:26 pm)
After reading your post I realize that I am not the only one with this exact problem. When you spoke about the watching the volt guage float from 14 I literally had "deajavue" of driving in my 98' Sonoma. Since it has been over 4 years since your last post I am wondering if you found your problem and if so...WHAT WAS THE PROBLEM!?!? Please help! Thanks!
#418 of 444 Re: 2004 Chevy S-10 Electrical meltdown [kngjmz]
Oct 20, 2011 (7:38 pm)
Hello there. I see that I am by no means the only person that has major electrical problems with my 98' GMC Sonoma 5 speed. Tonight, I just replaced my 3rd battery in the past 1 1/2 years...luckily I purchased a battery with 3 year replacement for FREE! Anyways, this is what my truck does to annoy me...
Sometimes it will drive fine all day, but others it barely wants to get a mile and the volt guage will fluctuate after staying pinned at 14 it will "float" a bit below 14 and if I use my blinker or some other electric instrument it goes down as well. Another thing it does is when I am driving the guages will all of a sudden go crazy...the MPH and RPM guage will go way high and then go all the way down. The other guages will act eratic as well and then the truck will shut off. Sometimes it will start right back up, but other times I will have to pull over and pray that it will start again. Tonight it didn't start at all...wouldn't jump-start either so I returned my battery for a new one, replaced it, and then proceeded to drive about 8 miles to my house without a single issue except I noticed the volt meter dip a bit when I used my blinker.
I've had my starter replaced, and the battery and alternator have been checked and all check out fine. I've been told it could be a speed sensor, but the AAMCO told me that manual transmissions don't have a speed sensor?! The fuel pump has been recently replaced as well, but because it was shot. I see that many people have electrical problems with this vehicle and was hoping that you could give me a bit of advice on where to go next. Thanks!
#419 of 444 Electric goes out completely
Nov 05, 2011 (1:31 pm)
My 96 S-10 2.2 5 speed runs great with 300,000 miles but lately has been loosing all electrical power. It stalls and goes completely black. even the presets on the radio are erased. Turn the key nothing, no interior or exterior lights nothing. A few minutes later it runs fine again. I think this has happened while driving but the momentum just restarted the motor. I had battery checked and replaced two days ago. Alternator replaced a year a go.
#420 of 444 Re: Electric goes out completely [jrctoby]
Nov 05, 2011 (1:36 pm)
first thing to check with electrical problem (especially in these trucks it seems) is a bad ground. Probably a main ground somewhere.
#421 of 444 1999 chevy s-10 front lights out
Nov 25, 2011 (4:13 pm)
i have a 1999 chevy s-10 with a 2.2. When i have the car running and no lights on, the day time running lights do not come on. When i turn the lights on no head lights come on. Just the running lights. If i play with the column and put it in drive i can get the running lights on. Anyone have any suggestions???
#422 of 444 Re: GMC Sonoma electrical problem [tjacoby4]
Dec 11, 2011 (5:23 pm)
Did you ever figure this out?! This just happened to me recently. Any advice would be much appreciated.
#423 of 444 S-10 Electrical Issues
Dec 20, 2011 (4:49 pm)
when i am having issues i get nothing, not even the dome light. however, if i turn the ignition, my gagues will start to rise or flicker. I have to disconnect the battery then reconnect and everything will come back on and it will start. as i am driving, i can hear the alternator in the speakers and the dask lights flicker. i have replaced the ignition switch and alternator. thinkg short someplace or a switch. it has gradually got worse. today i had to jump it bypassing the battery. Any ideas?
#424 of 444 Re: S-10 Electrical Issues [mattcsr]
Dec 20, 2011 (5:17 pm)
If I had to guess, I'd say you have a bad ground. A major one, like the cable to the block, or the block to the frame, etc. Next time it happens, try just jerking on the cables and see if it comes back on. I just had this happen with my 79 Chevy truck. I turned on the headlights, which barely glowed, and started pulling on cables. When the lights came alive, I new where the problem was. It turned out to be where the negative cable went into the cable-end attached to the battery (Autozone junk).