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Old 08-24-2020, 12:02 AM   #9
mr48chev
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Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,838
Re: American Autowire Rear Tail light Harness

Rear side marker lights would just run off the tail light circuit.

To my knowledge the side marker lights never flashed on any pre 1988 GM truck and I don't know if they ever did on later models.

If you want them to flash rather than be on with the park/tail lights you will have to wire each into the turn signal wire for that side of the truck. Then swap to a brighter bulb with the same base on it.

You would have to figure out how to swap out the sockets and bulbs to have both side marker lights and ones that flash.

Standard bulb for the side marker lights ia 194 that uses this socket.
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