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How To Find Where the Trailer Running Light Relay Is Located On a Vehicle with Factory Wiring  

Question:

Have brake lights but no running lights on trailer I found the fuses for the tow but cant find the relay.

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Expert Reply:

I am not sure what vehicle this is in reference to but in order to find out where your trailer running light relay is located you have two options. The first option is to check your copy of the owner's manual to see if it is listed here. If it is not listed in your copy of the owner's manual then you will need to check the underside of the lid for the engine bay fuse box. If you can provide me with the year, make, and model of the tow vehicle I can then look this up for you if listed in the owner's manual.

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Conner L

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