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Rear lights don't work when headlights or Parker's are on.
https://auszookers.com/forum/viewtopic.php?f=37&t=54559		 Page 1 of 1
Author:  dylanwilliams [ Fri Sep 08, 2017 7:44 pm ]
Post subject:  Rear lights don't work when headlights or Parker's are on.
Noticed my rear indicators, brake lights, reverse lights and Parker's stop working when I turn on the Parker's or headlights. All the front lights work and all the other rear lights work without the headlights or Parker's on. Checked continuity of grounds and checked all fuses. Only started doing it today. Not sure where to start with it tomorrow.
Author:  fordem [ Fri Sep 08, 2017 9:58 pm ]
Post subject:  Re: Rear lights don't work when headlights or Parker's are o
It's a ground issue, to be specific, it is a rear light ground issue.
Author:  dylanwilliams [ Sat Sep 09, 2017 5:23 pm ]
Post subject:  Re: Rear lights don't work when headlights or Parker's are o
Worked it out it was related to the chassi not being properly grounded to the battery and body.
Author:  fordem [ Sun Sep 10, 2017 2:08 am ]
Post subject:  Re: Rear lights don't work when headlights or Parker's are o
Ex factory, the chassis is not a part of the electrical system, the battery negative connects to the bell housing (for the starter & alternator returns) and to the body (for all other returns), so I suspect that at some point some one grounded your rear lights incorrectly, are discussing the vehicle in your avatar pic.? Was a tray conversion done?
Author:  dylanwilliams [ Sun Sep 10, 2017 7:18 am ]
Post subject:  Re: Rear lights don't work when headlights or Parker's are o
It has always been a tray back. Well Since Ateco imported it and chopped it into a tray back in '92. My accelerator cable snapped last week. I wonder if that was the path ground was taking to the chassis lol?
Author:  dylanwilliams [ Sun Sep 10, 2017 7:25 am ]
Post subject:  Re: Rear lights don't work when headlights or Parker's are o
I'm guessing on factory traybacks there was a cable to the chassi and it was part of the electrical system?
Author:  pete_79 [ Sun Sep 10, 2017 2:17 pm ]
Post subject:  Rear lights don't work when headlights or Parker's are on.
fordem wrote:
Ex factory, the chassis is not a part of the electrical system, the battery negative connects to the bell housing (for the starter & alternator returns) and to the body (for all other returns), so I suspect that at some point some one grounded your rear lights incorrectly, are discussing the vehicle in your avatar pic.? Was a tray conversion done?


Interesting, this is my factory wiring from the body to the chassis beside the drivers side tail lights. You can just see the connection onto the body in the background of this pic.
I was chasing a fuel gauge fault and found this wire had broken on the chassis side of the connection. I ran a dedicated earth for my fuel gauge and fixed this connection on the factory wiring as well.
Image

And the passenger side also connects the lights to the chassis and the chassis to the body.

Image
Author:  Gwagensteve [ Sun Sep 10, 2017 3:23 pm ]
Post subject:  Re: Rear lights don't work when headlights or Parker's are o
I believe only the earth on the LHS is factory. IIRC.
Author:  dylanwilliams [ Sun Sep 10, 2017 3:43 pm ]
Post subject:  Re: Rear lights don't work when headlights or Parker's are o
I ran some thick cable and ring terminals from the battery to the one of the bolts securing the fuel line on the chassis and it fixed it. My fuel gauge reads more accurately now too. I tested for continuity between the body and chassis and It was showing a lot of resistance before.
Author:  dylanwilliams [ Sun Sep 10, 2017 5:46 pm ]
Post subject:  Re: Rear lights don't work when headlights or Parker's are o
just went and filled it up and the fuel gauge actualy reads full now. Before completely filled up it showed just above half.
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