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2022 Ram 2500 Cummins - trailer issue

Old Mar 18, 2022 | 01:12 PM
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Default 2022 Ram 2500 Cummins - trailer issue

2022 Ram 2500 Cummins - Trailer wiring issue.
Just bought new 22 Ram. First 500 miles have been great. Have 3 trailers we use regularly. A 20ft flatbed (2020 model) , a 16 ft Parker Performance Co-Hann livestock trailer (2003) and a 2017 Bison LQ Horse trailer. The LQ and flatbed lighting and brakes work fine. I am struggling with the Parker Performance stock trailer. I've changes the plug and a tail light and still cannot get wiring to work. Meter checks fine on truck side.
I have 5 wires from trailer for a 7 pin plug.
Parker trailers tell me this is configuration:
White - ground
Black - brakes
Green - left
Brown - running lights/marker
Yellow - Right.
I've tried the above combination with the new 7 pin Pollak plug according to Ram configuration - no lights.
The lights seem to have a clean ground with an aluminum rivet to frame.

Note: Before I traded in my 2017 Silverado 2500 truck - all 3 trailers lights & brakes worked fine. Some reason the older Co-Hann stock trailer is not working with new Ram?
Any ideas appreciated.
Tim
 
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Old Mar 18, 2022 | 01:15 PM
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