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adding driving lights question

ChrisNJ

By ChrisNJ
in Troubleshooting & Recalls

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ChrisNJ Enthusiast

ChrisNJ

Posted
Posted

I'd like to add some KC slimlite driving lights to my 14 Sierra, but I can't find where to tap into the headlight circuit for the driving light relay. There is no apparent relay or fuse in the underhood fusebox. I did see 4-5 wires below the drivers side headlight assembly but they are tucked in tight, so I don't see how I can tap into that. I do realize that the Aux. lights will stay on with Hi and Low which is what I want to happen. I will add the interior switch to turn them off if need be. Thanks.

Newfydad Enthusiast

Newfydad

Posted
Posted

A convenient place to tap into a supply voltage to activate your driving light relay is either pin 1 or pin 2 of connector X4 on the Body Control Module under the dash. There are 7 connectors on the BCM. X4 is the black one in the middle. The wires at pins 1 and 2 are both yellow. One is supply voltage for left low beam. The other is for right low beam. Choose either one. This will turn on your driving lights whenever the headlights are on. Use a switch to turn driving lights off as desired.

 

This will help you find the BCM and the connector. See post #9 for the pictures (and foglight mod if you want it):

 

http://www.gm-trucks.com/forums/topic/162734-foglights-on-with-high-beams/

 

Pages 149, 150 and 190 of this document should help understanding:

 

https://www.gmupfitter.com/files/media/photo/474/2014%20BBM%20Electrical%20section_10_18_2013_WIP.pdf

 

 

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      push to talk button

      By davester · Posted

      drive the truck back to the dealer and complain that the button works.
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