'87 240 rear lights issue

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Old Jul 9, 2024 | 01:29 AM
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dunnesqc's Avatar
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Default '87 240 rear lights issue

Hey team,

So my wife learned to drive and grew up on a 245 so naturally she always looks for one. Well, we purchased one a few weeks ago and are experiencing a few minor inconveniences that I was hoping you all could help me with.

Individually, all the rear lights work. But, when you start turning them on at different times, you'll get different results. For example, if the headlights and fog lights are on, you press on the break and turn on the right blinker, the left reverse light will ever so slightly turn on. I know enough to know that this is likely a wiring issue or a ground issue but I just don't know where to start. Any help would be appreciated.

Thanks!
 
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Old Jul 9, 2024 | 02:34 AM
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Default Dirty or poor earths or a blown filament

Check and clean the earths up, or you have an individual bulb with a blown filament.id start with the rear tail light earths myself
 
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Old Jul 10, 2024 | 01:03 PM
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Thank you for your guidance! I was able to locate the grounds that come from the tail light assembly. I disconnected them, cleaned them up, and reinstalled them. Unless I did it incorrectly, it doesn't seem to be my issue. Are there other grounds that control this circuit that I can go searching for? Pointing me to a general area would be appreciated!
 
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Old Jul 10, 2024 | 01:51 PM
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On the back of the lights there is a pcb (dog bone) that the wires connect to. Check those terminations and that the board is not damaged/cracked. Sometimes the traces **** out so you just solder the wires on there.
 

Last edited by Kiwijesus740; Jul 10, 2024 at 01:54 PM.
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