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  #1 (permalink)  
Old 01-28-2021, 11:13 AM
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Default Rear Brake Light wiring question

Would it be as simple as tapping into one of the three red wires leading to the rear brake/signal light in the trunk on the drivers side to power a third brake light and if so, which of the three would be used?
Thanks in advance,
Gary
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  #2 (permalink)  
Old 01-28-2021, 02:56 PM
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Quote:
Originally Posted by Blackbart View Post
Would it be as simple as tapping into one of the three red wires leading to the rear brake/signal light in the trunk on the drivers side to power a third brake light and if so, which of the three would be used?
Thanks in advance,
Gary
Not unless you want your TBL blinking with your turn signals. Instead, tap in to the red wire leading to the trailer relay at the base of your steering column.

Last edited by patrickt; 01-28-2021 at 03:08 PM.. Reason: In the back, the Green & Yellow are brake/TS lights; the red are for the tail and license plate lights
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Old 01-28-2021, 04:34 PM
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That's what I thought Patrick, just needed confirmation. Thank you.
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Old 01-29-2021, 04:56 AM
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There are two spare wires in the harness (one for a fuel pump, the other for backup lights) that can be used to do Pat's method.
Alternately you can take power from both rear signal light wires, using diodes to directionally limit the current to the 3rd light.
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Old 01-29-2021, 06:00 AM
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Quote:
Originally Posted by strictlypersonl View Post
There are two spare wires in the harness (one for a fuel pump, the other for backup lights) that can be used to do Pat's method.
Alternately you can take power from both rear signal light wires, using diodes to directionally limit the current to the 3rd light.
Thanks Bob. I've used the back up light wiring already, NY requires a backup light. I'll hunt down the fuel pump wire.
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Old 01-29-2021, 10:45 AM
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BB,

You'll have to cut (intercept) the blue wire at either side of the 28/53 junction to make the new connection.
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