Locating Reverse Light Circuit on 2003 Dodge Ram
Question:
Is there a diagram/document or can you describe to give my truck guy to determine what wire from my Dodge Ram 2003 truck backup lights is used to put in my new 4/7 wire truck tracker harness to deactivate the trailer brakes on backing up on my 5 wire trailer? this is the one I just got from you: 20135 Multi-Plug T-One Connector Assembly for 7-Way and 4 Pole Trailer Connector. I have a 5 from trailer to 7 wire converter plug I use from trailer to truck to go into the 7 round that will be on the truck.
asked by: Alan W
Expert Reply:
In my research, I saw several mentions that Dodge liked to use a purple wire for the reverse lamp circuit. However, I wouldn't recommend taking this as gospel. The best practice is to wire by function, not by color. Unfortunately, I don't have any documentation of wire color codes.
The # 20135 you referred to plugs into the tow package wiring. The wire in the harness behind the 20135 that connects to the center pin of the 7-way connector will carry the reverse light circuit, so you can obtain the signal there. If you use an adapter like part # A75TB, you shouldn't need to do any splicing at all. The tow package wiring on the truck should already be tied into the reverse lamp circuit.
Product Page this Question was Asked From
Multi-Plug T-One Connector Assembly for 7-Way & 4 Pole Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- No Converter
- Custom Fit
- 4 Flat
- 7 Round - Blade
- Tekonsha
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