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-   -   1991 Dodge Ram 3500 diesel Cummins dually tail light issues (https://www.dieseltruckresource.com/forums/cummins-conversions-157/1991-dodge-ram-3500-diesel-cummins-dually-tail-light-issues-331607/)

Travis Bradley 02-12-2019 04:45 PM
1991 Dodge Ram 3500 diesel Cummins dually tail light issues
 
No tail lights or running lights. Changed multi function switch, checked all fuses and bulbs. Have brake lights and blinkers and hazards work. Any ideas???? Need help

NJTman 02-12-2019 08:10 PM
Originally Posted by Travis Bradley (Post 3358081)
No tail lights or running lights. Changed multi function switch, checked all fuses and bulbs. Have brake lights and blinkers and hazards work. Any ideas???? Need help
there are two disconnects , one on each side of the truck, up under the bed in the frame , behind each rear wheel. These disconnects get all funky inside. Find them, and use a test light to see if power is on the front harness, and not traveling across the connector

Travis Bradley 02-12-2019 09:38 PM
Originally Posted by NJTman (Post 3358094)
there are two disconnects , one on each side of the truck, up under the bed in the frame , behind each rear wheel. These disconnects get all funky inside. Find them, and use a test light to see if power is on the front harness, and not traveling across the connector
Thank you, I will try it tomorrow

NJTman 02-13-2019 01:06 PM
Originally Posted by Travis Bradley (Post 3358098)

Thank you, I will try it tomorrow
I had the same problem you've described. I wound up having to bypass the connector with a separate wire because the connector had eroded over time.

Good luck.


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