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Crazy electrical issues

Old Mar 12, 2017 | 01:16 PM
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Crazy electrical issues

So i had a thread a few weeks ago about this but i did some more diegnosing and still nothing. 1993 w250 5speed single cab. Start truck, everything Normal at idle. As soon as i put it in gear and start rolling to pull out of my driveway my abs and parking brake lights come on and radio shuts off. Lights go out radio comes back. Pull out of my driveway shift from 2-3 volt gauge drops to 8 abs and parking brake lights come on, radio shuts off, my speedometer drops to 0 but when i get into 3 and give it pedal it picks back up, oil pressure gauge its burried, temp gauge and isspro tach start jumping around. So i take the fuse out of the radio to eliminate that from the equation, still same thing. So i put to fuse back and i unplug the abs system from behind the glove box and still sane thing. Radio cuts in and iut intermittenly like before. Its almost like theres a big electrical surge throughout the truck. Someone please help
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Old Mar 12, 2017 | 02:20 PM
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Originally Posted by Oldbull1997
So i had a thread a few weeks ago about this but i did some more diegnosing and still nothing. 1993 w250 5speed single cab. Start truck, everything Normal at idle. As soon as i put it in gear and start rolling to pull out of my driveway my abs and parking brake lights come on and radio shuts off. Lights go out radio comes back. Pull out of my driveway shift from 2-3 volt gauge drops to 8 abs and parking brake lights come on, radio shuts off, my speedometer drops to 0 but when i get into 3 and give it pedal it picks back up, oil pressure gauge its burried, temp gauge and isspro tach start jumping around. So i take the fuse out of the radio to eliminate that from the equation, still same thing. So i put to fuse back and i unplug the abs system from behind the glove box and still sane thing. Radio cuts in and iut intermittenly like before. Its almost like theres a big electrical surge throughout the truck. Someone please help
It is so random that there must be a loose or corroded connection. I would start with the main harness connector on the firewall. Clean it up and put some dielectric grease on it, then see what happens...Mark P.S. Check all the grounds too...
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Old Mar 12, 2017 | 02:29 PM
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Originally Posted by maybe368
It is so random that there must be a loose or corroded connection. I would start with the main harness connector on the firewall. Clean it up and put some dielectric grease on it, then see what happens...Mark P.S. Check all the grounds too...
dumb question but where is the main harness connection on the firewall?? Terrible with electric stuff
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Old Mar 12, 2017 | 02:45 PM
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Originally Posted by Oldbull1997
dumb question but where is the main harness connection on the firewall?? Terrible with electric stuff
It's a big black box on the drivers side firewall, under the hood, not the dash. It has a single bolt in the middle of it...Mark There is also a really small ground from the battery to the truck just on the drivers side of the radiator, clean that up, or better, put a bigger, better ground cable. Dodge really wimped out on the grounds...
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Old Mar 12, 2017 | 03:10 PM
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Also, ehat are these 2 canister things with the 2 wires coming off each?
Originally Posted by maybe368
It's a big black box on the drivers side firewall, under the hood, not the dash. It has a single bolt in the middle of it...Mark There is also a really small ground from the battery to the truck just on the drivers side of the radiator, clean that up, or better, put a bigger, better ground cable. Dodge really wimped out on the grounds...
okay so i took the main connection out, blew it out with some canned air and some fust came out not much. The little ground coming off the ground wire was ripped off and gone, can i just put 2 eyelets on a big wire and connect it to the terminal and the core support by the radiator? Would that work?
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Old Mar 12, 2017 | 03:21 PM
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Originally Posted by Oldbull1997
Also, ehat are these 2 canister things with the 2 wires coming off each?


okay so i took the main connection out, blew it out with some canned air and some fust came out not much. The little ground coming off the ground wire was ripped off and gone, can i just put 2 eyelets on a big wire and connect it to the terminal and the core support by the radiator? Would that work?
Yes and you may have found your problem. So, there is no wire coming from the negative terminal on the battery to the core support? There is no such thing as too many grounds...Mark
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Old Mar 12, 2017 | 03:26 PM
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Originally Posted by maybe368
Yes and you may have found your problem. So, there is no wire coming from the negative terminal on the battery to the core support? There is no such thing as too many grounds...Mark
well the wire has been gine ever since i can remember, and all this just started a few weeks ago. What are thise cannister things in the pic i posted?
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Old Mar 12, 2017 | 03:49 PM
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Originally Posted by Oldbull1997
well the wire has been gine ever since i can remember, and all this just started a few weeks ago. What are thise cannister things in the pic i posted?
If that wire was gone, there was no direct connection between the negative terminal on the battery and the vehicle chassis. Before, the ground was coming from the engine, through wherever there is metal to metal contact between the engine and the chassis. As you probably know, a lot of that contact is sitting on rubber. The ground path may have gone through the drive shaft, the springs or wherever it could. That path was iffy at best, so maybe something rusted a little more, something got loose or many other things. The point is not that it used to work with no good chassis ground, but that it needs a good chassis ground. Notice that all of your symptoms seem to be chassis electronics like the radio and such. Once you have good grounds and the problem continues, then you can look for other things...Mark
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Old Mar 12, 2017 | 03:58 PM
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Originally Posted by maybe368
If that wire was gone, there was no direct connection between the negative terminal on the battery and the vehicle chassis. Before, the ground was coming from the engine, through wherever there is metal to metal contact between the engine and the chassis. As you probably know, a lot of that contact is sitting on rubber. The ground path may have gone through the drive shaft, the springs or wherever it could. That path was iffy at best, so maybe something rusted a little more, something got loose or many other things. The point is not that it used to work with no good chassis ground, but that it needs a good chassis ground. Notice that all of your symptoms seem to be chassis electronics like the radio and such. Once you have good grounds and the problem continues, then you can look for other things...Mark
okay im gonna ground that out. Do you know what those things are in the picture
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Old Mar 12, 2017 | 04:03 PM
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Originally Posted by Oldbull1997
well the wire has been gine ever since i can remember, and all this just started a few weeks ago. What are thise cannister things in the pic i posted?
I think that those are for the grid heater, but I am not completly sure...Mark
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Old Mar 12, 2017 | 04:04 PM
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Yes those are the grid heater solenoids.
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Old Nov 16, 2017 | 02:35 PM
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Help my 02 durango has no dashlights taillights or radio and inside lights what can this be?
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Old Nov 16, 2017 | 05:30 PM
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Originally Posted by Ashley Stinson
Help my 02 durango has no dashlights taillights or radio and inside lights what can this be?
Something's broken.
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Old Nov 16, 2017 | 05:34 PM
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Originally Posted by Oldbull1997
okay so i took the main connection out, blew it out with some canned air and some fust came out not much. The little ground coming off the ground wire was ripped off and gone, can i just put 2 eyelets on a big wire and connect it to the terminal and the core support by the radiator? Would that work?
There's a couple of grounds in the dash. When they fail and dash circuits start swapping spit, silly things happen.

All the grounds are detailed (location) in the service manual, electrical section. They are also detailed in the schematics.
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Old Nov 16, 2017 | 05:44 PM
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From: Land of the Toxic Avenger
Originally Posted by j_martin
Something's broken.
Lol..

Ashley needs to start her own thread, and not divebomb this one.
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