Barracuda Challenger Forum

Author Topic: Another lighting question  (Read 194 times)

Online jhaag

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Another lighting question
« on: December 22, 2016 - 09:22:40 PM »
70 challenger...why do the front side marker lights have 2 wires? Don't they ground through the body? I don't think they blink, do they? Rears are single wire, and evidently ground through body? Building a custom harness and just trying plan it out. Thanks
love 70 Challengers




Offline duodec

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Re: Another lighting question
« Reply #1 on: December 23, 2016 - 02:13:45 AM »
I only have '71 wiring diagrams.  On those, it looks like the second wire that serves as a ground ties into the ground terminals on the headlights (for the side the marker is on) then back to a common 'headlight ground' that ties left and right headlight/side marker grounds together. 

I'm not sure why; if they were concerned that the bolted-on fenders (with sealer that probably insulates) might not provide a good ground, then the fender-top-mounted indicators might also have a ground lead; instead they ground to the fender.  However Chrysler also provided for a specific ground for the headlights (per the diagram; its been years since I pulled my engine and front lighting harnesses so I don't remember exactly) so maybe thought that the other standard front end lighting should share that ground, but the optional ones on the fender top didn't get that benefit.  Just a guess.

Offline 73440

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Re: Another lighting question
« Reply #2 on: December 23, 2016 - 08:03:01 AM »
67 440
73 Barracuda w/ 68 440
65 Plymouth Fury III , I sold ,was my Nana's car till 92 yo.
51 Ford F1 239 Flathead, flipped , new cab , stolen
59 BelAir 283 4 door original patina
01 Chevy van 366,077 miles
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73 HD Ironhead
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74 Norton 850
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Online jhaag

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Re: Another lighting question
« Reply #3 on: December 23, 2016 - 11:08:09 PM »
Thanks guys. The wiring PDF is helpful.
love 70 Challengers