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Electrical 3rd Gen Dodge Ram Electrical Problems and Questions.


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  #1  
Old 05-16-2012, 09:33 PM
srbaker
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Default Trailer wiring harness

Hello,

The 7-pin trailer socket on my 04 Ram 3500 wasn't behaving properly, so I bought a new Reese 7-pin socket to replace it. I cut the wires at the back of the factory original to install the new one.

After I cut the wires, I realized two problems: 1) there are 8 wires in the factory harness, 2) the colours don't seem to match any standard I can find.

Can someone tell me what each wire is? I'm assuming the green and yellow are the turn signals, but I can't figure out what the rest are.

There are:
2 black wires
1 yellow
1 grey or brown (hard to tell, it's dirty!)
1 green
1 white/green
1 red/purple
1 dark green

I hope someone can help me with this.

Thanks!

-Steven
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  #2  
Old 05-17-2012, 09:57 PM
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Default

Trailer tow connector-add on - 10 way

1 - -
2 white/pink trailer tow right turn relay output
3 violet/black backup lamp feed
4 white/red fused b(+)
5 black/orange park lamp relay output
6 - -
7 light blue trailer tow brake b(+)
8 black ground
9 black ground
10 yellow/pink trailer tow left turn relay output

This is from my 03 service manual. Obviously different from your 05 but you can test the wires at the plug and take it from there. Keep in mind theres also a trailer tow turn signal relay up from in the integrated power module. You can download your service manual here:
http://www.2shared.com/file/f4z4S786...ce_Manual.html

Good luck.
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