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Old 10-23-2018, 11:59 AM   #3
Zeroman
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Join Date: Mar 2013
Location: Houston, TX
Posts: 348
Re: GMC headlight upgrade issues

^^^^^What he said^^^^^

Those headlights pull more amps than standard ones, overloading the circuit.

Install a proper headlight harness with the relays. This will power the headlights right off of the battery, not through the headlight switch.
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