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Pickups Chevrolet S-10 & GMC S15 Sonoma Chevy S10 - GMC S15 and Sonoma Electrical Problems
318 messages, Last post on Nov 24, 2009 at 8:14 AM
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Replying to: fatal22 (Aug 08, 2009 10:56 am)
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| Need help, have been having a bad electrical issue, truck is running and and when the the ignition is shut off the truck continue to runs but if you turn down the dimmer switch the truck will shut off. Also with the truck off you can turn on the radio by turning on the headlight switch but if you use the dimmer you can shut the radio back off. I have replaced the headlight dimmer switch with no luck. It acts as if the headlight switch is crossing or back feeding with the ignition switch, because when you do turn on the headlight switch the service engine soon light comes on. Can anyone point me in the right direction. 2002 chevy s10 4.3L 4x4 Thanks | |
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Replying to: the_big_al (Aug 08, 2009 11:26 pm) |
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Replying to: 98sonoma (Sep 14, 2008 5:52 pm) Volt meter will slowly dip from fourteen down to around 11, taking up to 5 minutes to drop, sometimes bounce back up momentarily only to drop again, and the truck will sputter and die. Sometimes I can put it in gear while it's rolling and it'll kick back in and pop back up to 14 volts and be fine...but usually if it DOES start back up, it'll just slowly dip back under 11 and die, and to keep from fighting with it I'll just coast till I find a decent place to pull over. The radio, a/c, lights, everything accessory continue to work, lights are NOT dim at all, even though the volt meter reads nothing with the key on. Then I sit, turn the ignition off and back on...sometimes getting absolutely nothing, sometimes barely over 11, but when it's ready to go and run right it'll jump all the way back to 14...and start like nothing happened. If I don't let it sit for about five minutes, I'll try to start it and it'll do something that's almost like it's fouling out...won't be weak turning over, but it's like as soon as the engine kicks in something is killing it...so I let it sit a little longer, and eventually it'll start and sometimes won't do it again. Also, I've noticed that sometimes the security light will come on...more about that in a moment. It has done this since around 105k, it'll happen for a couple of months, then go away, sometimes for six months at a time until it returns. It seems to happen more when it's hot outside, whether the air is running or not, and when it's raining at night, obviously when there's more of a pull on the battery. Very early on I noticed that using my blinkers would make it take huge dips, and sometimes make it begin the "slow fade" when it had been fine...so I just stopped using them altogether...and it still happens. It happens at freeway speeds, city driving, has happened while I've been stopped at red lights, it doesn't really matter...and it'll seem to be getting worse and worse, I'll repair or replace something, and then it'll go away for a few months...and come back. I have replaced the battery, put in two alternators, a starter, battery cables, found a security system under the steering column that would click and keep it off (may have been unrelated) and took it and all its wiring out, found a heat shield on the starter between it and the exhaust pipe that was shorting out from the hot wire to the pipe, tried to make it work and eventually removed it...found various bad connections in the dash and replace them...and all of these things would make it better for a few months, and then it'd come back. As far as I know I'm the third owner of the truck...the guy I bought it from told me nothing about the security system (it made the lights flash), and it has wiring that suggests that someone had an amplified sound system in it as well...all of which I've removed, and I thought maybe bad wiring by them in the past was where this was coming from, until I checked message boards and saw others having the same problems. The only things I can think to replace now are the ignition and ignition switch, and I'm starting to think maybe there's a bad circuit in the CPU or something. If anyone has fixed this or has any suggestions, I'd love to hear them. I'm ready to blow the truck up before it stalls on the freeway again and succeeds in killing me. |
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Replying to: longtravels10 (Mar 05, 2009 6:51 am) |
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 i have a 2000 gmc sonoma and my headlights dont turn on at night and sometimes during the day. i checked fuses, ground, switch and relay is good. the bulbs are good. what gets me is when i have the problem the two wires at the plug for the bulb are throwing 12v positive.any body can help it would be appreciated. thanks
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Replying to: vanscooter (Aug 07, 2009 8:45 am) |
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| 1991 chevy s-10, bad ign module replaced, still only getting spark to top of distributor at end of ignition try. whats up? | |
holy roller. You have described the problem exactly what my truck does. I am sure that your speedo and tach sweeps all the over just like a electrical hiccup. All gauge lights up. What do we do anything? Have you found a solution besides "For Sale". I would hate for it to die when trying to pass a vehicle.
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Replying to: meate (Sep 10, 2009 8:23 pm) |
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