Problems with rear lights after powder coating
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Intermediate
Joined: Mar 2014
Posts: 28
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From: houston, tx
Problems with rear lights after powder coating
Recently I had my rear break light mount powder coated. After the lights wiring harness was wired back up just like I removed them. Once I plugged them in none of them were working (front or rear)
so after some trouble shooting this is what I have noticed:
When I have one of the rear bulbs replaced, the front and the one bulb in the rear is working correctly (brakes and running lights). Bulb can be on either side left or right.
when I plug in both bulbs on the rear light bar it turns all the lights (front and rear) off.
I assume the circuit is not being completed but cannot figure out why.
any help would be appreciated. This is driving me nuts!
so after some trouble shooting this is what I have noticed:
When I have one of the rear bulbs replaced, the front and the one bulb in the rear is working correctly (brakes and running lights). Bulb can be on either side left or right.
when I plug in both bulbs on the rear light bar it turns all the lights (front and rear) off.
I assume the circuit is not being completed but cannot figure out why.
any help would be appreciated. This is driving me nuts!
Seasoned HDF Member
Joined: Feb 2007
Posts: 6,086
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From:
As noted earlier the ground connection.
Lights require positive and negative(ground).
Powder coat is not conductive so ground is lost unless you compensate for it.
The chassis contact (bolting point) would be the ground.
Lights require positive and negative(ground).
Powder coat is not conductive so ground is lost unless you compensate for it.
The chassis contact (bolting point) would be the ground.
Thread Starter
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Intermediate
Joined: Mar 2014
Posts: 28
Likes: 0
From: houston, tx
Sorry I forgot to mention it but The motorcycle is a 2016 Street Glide. From what I understand though the ground is through the wifing harness so not sure how this could be a ground issue?
Seasoned HDF Member
Joined: Jul 2008
Posts: 9,282
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From: southeast PA
While it is true that there are ground wires in the harness, the grounding has to occur at some place or places on the frame. That is what you need to check. If there is a ground for the taillight it's possible that the new powder coating is interfering and needs to be sanded or filed down to metal.
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Seasoned HDF Member
Joined: Sep 2017
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From: England
I doubt HD make many changes so I would expect the main wiring ground to be a point emanating from a stud on the crankcase of the engine.
Wiring diagram here - 99949-16_en - 2016 Wiring Diagrams | Harley-Davidson SIP
Ronnie's Harley-Davidson's 2016 Harley Davidson FLHX STREET GLIDE (KBM) | WIRING HARNESS MAIN - NON-ABS (FAIRING MODELS) - 5 Parts List (onlinemicrofiche.com)
Wiring diagram here - 99949-16_en - 2016 Wiring Diagrams | Harley-Davidson SIP
Ronnie's Harley-Davidson's 2016 Harley Davidson FLHX STREET GLIDE (KBM) | WIRING HARNESS MAIN - NON-ABS (FAIRING MODELS) - 5 Parts List (onlinemicrofiche.com)
