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Electrical 2nd Gen Dodge Ram Electrical Problems and Questions.


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  #1  
Old 09-08-2011, 10:56 PM
camoman214 camoman214 is offline
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Default Tail Lights / Reverse lights

I picked up a '99 Dodge Ram Sport today. Been looking it over some and found a few issues. Thought I'd post in the electrical section about my tail lights, reverse lights and turn signals. When I turn on the right turn signal, the left and right reverse lights will flash in alternating sequence with the turn signal light. What could the issue be? What should I check out first? When I turn on the left turn signal, everything seems to operate as it should. Thank ya
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  #2  
Old 09-09-2011, 12:57 AM
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Sounds like you may have a ground short. I'd start by looking for some pinched wires or evidence where someone has tampered with the factory wiring (possibly wiring in an extra set of reverse lights). I'd start at the lights and work your way forward.
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Old 09-09-2011, 01:09 AM
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Look at the back of the frame rail near the rear bumper on the drivers side for a splice connection with about 7 black wires (One of them is thicker than the remaining 6). There is likely a problem with it.
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Old 09-09-2011, 10:03 AM
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I will check that out when I get off work this evening.

I noticed a few other possible electrical issues. Not much is operation inside the cab. The dome lights don't come on (either with doors open or with the dimmer switch control), the power mirrors don't work, the driver nor passenger personal map lights don't work either. Are these devices on the same circuit? Possibly related to the tail light issue? Where are the fuses located for those circuits. I quickly pulled off the fuse panel in the door jam, but didn't see anything labeled with those devices.

Thank y'all.
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Old 09-13-2011, 12:09 PM
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I also noticed this while checking things out. When I put the transmission into reverse, the reverse light on the right (passenger) side is dim compared to the left (driver) side. Is the passenger turn signal and passenger reverse light grounded in the same location; possibly causing this electrical phenomenon?
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Old 09-15-2011, 09:01 PM
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Have you a trailer connector? That may be your tail/turnsignal prob... It plugs in - line behind the drivers tailight assy. My reverse light failure was a sensor on the trans, one light, corrosion at the bulb to get the other one up to full brightness on the other side, (after changing the trans sensor)
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Old 09-16-2011, 12:31 AM
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Yes, there is a trailer light connector. Which sensor on the transmission are you referring to? I haven't noticed any corrosion on either of the reverse light bulbs.
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Old 09-18-2011, 11:56 PM
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There is one connector that I think is worth checking out. It is below the right tail light.
Connector has 4 wires -
Black/Yellow
Black
Brown/Red
Violet/Black

Start by disconnecting this connector and re-connecting it....about 6 times to cycle the contacts.
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Old 09-19-2011, 02:27 AM
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I disconnected the plug just as you said to no avail. The lights still repeated the issue. I found a hard plastic-type harness with lots of electrical tape around it and several exposed wires, but none of them seemed damaged. Here is a picture of that harness. It is located just above the driver's side rear strut.



I did notice a wire that was sticking out of the harness. It's probably not the source of my problem, but I am curious as to where it should go. It has a label sticking off of it that says "CHMSL". In the picture below, that harness at the bottom leads to the trailer light connector.

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Old 09-19-2011, 10:07 AM
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This is an auxillary 'Brake Light' wire. CHMSL = Cab High Mounted Stop Light.
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