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Electrical 1st Gen Dodge Ram Electrical Problems and Questions.


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  #1  
Old 06-24-2014, 11:18 AM
Johnny B 1965 Johnny B 1965 is offline
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Default No running lights

New guy here. I found a post with the same problem I am having with my 1994 Dodge. I did not read/find the resolution/fix in the thread.
I have head lamps but no running lights or dash lights. All other functions seem to work.
I checked the 15 A fuse and it is ok. I also pulled the connecter for the towing light harness.The light switch has been replaced. I found that the plug in the old unit was melted in some places and replaced it with a new one.
Any one figure this one out yet?
I did find that there was continuity between a Blk/Blu wire and blue wire. This would be U and B3 respectively on the switch post terminals.
If I slightly pull the switch at an in between distance, the running lights and dash lights come on but not head lamps.
This must be a simple detail I am over looking??
Thanks for the help
Johnny
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Old 06-24-2014, 01:23 PM
Warlock III Warlock III is offline
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I had the exact same problem. I suggest putting in a new fuse. Forget checking it I don't know how it happens with the intermediate position on the switch because it makes no sense to me.

I replaced everything and it wound up being the fuse.
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Old 06-24-2014, 04:15 PM
Johnny B 1965 Johnny B 1965 is offline
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Warlock III

Thanks for the response. I just tried your suggestion, it does not seem to be the solution in this case.
I suspect that there are two wires that have fused together. Without proper schematics I am just shooting in the dark.
Any one have an idea?
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Old 06-24-2014, 04:49 PM
Warlock III Warlock III is offline
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Where is the dimmer switch?

The dash lights are hooked up to the tail lights to let you know they aren't working. I'd check to see if the ground back there is good and if there's an aftermarket trailer wiring harness back there that may be the problem.

Last edited by Warlock III; 06-24-2014 at 04:51 PM.
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Old 06-24-2014, 07:04 PM
Johnny B 1965 Johnny B 1965 is offline
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The dimmer switch is on the tree to the left that controls the turn signals.

Here is the weird thing. If I pull the light switch plunger slightly back from the off position the running lights and dash lights will come on. The rear running lights work but only the right side on the front illuminate. However both front flashers work in the hazzard mode.The front left fillaments appear to be ok.
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Old 06-25-2014, 12:04 PM
Warlock III Warlock III is offline
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That whole "half-pulled" or... in juuuust the right position on the headlight switch drove me nuts and like I said MINE turned out to be the fuse.

I couldn't understand how the power would make it PAST the fuse if the switch was in just the right position as the fuse is upstream. Then it dawned on me that in the correct position the power was being siphoned off the headlight circuit.
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Old 07-04-2014, 02:59 PM
Johnny B 1965 Johnny B 1965 is offline
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OK,
So I replaced the head light switch and the multi function switch, checked and replaced the fuse.
I still get no running lights, can some one tell me the function of the baby blue and black/baby blue wires? When I use a meter there seems to be a short between U and B3. Any suggestions???
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Old 07-06-2014, 12:46 PM
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KevenP KevenP is offline
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I had the same problem on my XJ. Turned out to be a bad/corroded connection in the wiring harness at the head light switch.

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