Dodge Cummins Diesel Forum - View Single Post - Strange Trailer Light Problem
View Single Post
post #2 of (permalink) Old 04-29-2019, 11:35 AM
MDSWA
Diesel Head
 
MDSWA's Avatar
 
Join Date: Oct 2017
Location: NE Washington
Posts: 1,183
Thanks: 46
Thanked 127 Times in 125 Posts
Here's a link to the Newbies Guide for your new truck. It contains a Factory Service Manual that may help your to troubleshoot your electrical issues.

https://www.cumminsforum.com/forum/3...you-truck.html

Have you tested all functions on the 7 pin plug with a test light to make sure everything is working on the truck? That would isolate the problem to the truck vs the trailer. Bad trailer grounds and corroded sockets, etc., can raise havoc with trailer lighting. I had a similar issue with my 05. Everything worked except the left turn signal signal on the trailer. After much troubleshooting I ended up having to replace the TIPM as it turned out to be a non-serviceable bad relay.

05 Ram 3500, SLT Bighorn, SB QC, Dynamic Stage 3 48RE, triple disc, billet input, S&B CAI, FASS Titanium, Smarty Jr., New stock Bosch injectors, Edge CTS, Hushpower/Magnaflow 4 inch, FTE Resonator, Bilstein 5100's, Redhead Steering, Truxedo, Linex
MDSWA is offline  
The Following User Says Thank You to MDSWA For This Useful Post:
smeek (04-29-2019)
 
 
For the best viewing experience please update your browser to Google Chrome