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Old Today, 02:40 PM   #1
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Join Date: Oct 2016
Location: Porterville, CA
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Purple wire on GMC front signal connector

I am wiring a GMC C10 using a American Autowire Power Plus 20 harness. I am wiring up the the headlights and turn signals. On the original connector for the front turn signal the connector has 3 wires coming out of it. The colors are dark brown, light blue and a purple wire. Not sure what do I connect the purple wire to. Can someone help out.

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Old Today, 04:15 PM   #2
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Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 735
Re: Purple wire on GMC front signal connector

Prior to 1968, vehicles, including trucks didn't have side marker lights.. When side marker lights were introduced, the front markers were integrated with the front turn signals so they would blink with the turn signals.. You didn't mention the year you're working on, so I don't know if this feature applies to your project or not.. But I will make this suggestion.. Anytime electrical work of any type is being done, the first tool to pull out is a correct for the year wiring diagram.. If you don't have one, go to the ELECTRICAL forum and down load the one you need.. Most of the answers to your questions will be found there..
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