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Electrical help.

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I installed a light bar behind the grill. It is on a switch in the cab, I want to put it on a relay so i can control it with the hibeam switch. I was planning on using a fuse tap for the hibeam but I can not seem to locate the brights fuse. I realize the sierra just has a low beam with a shutter. How can I tap into a hibeam signal.


The light bar is on a relay now. It goes from the light bar to the relay which connects to the battery with a switch inside the cab. I was thinking since the switch is grounded and the 15 amps from the light bar is not going through the switch. Could I tap into the ground blocks like is done in the link below. So when the switch is grounded the light will come on.








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