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Discussion Starter · #1 ·
When the xc is parked and the key is out of the ignition the 3rd brake light is on.
The light is also on when the xc is running.

The 3rd brake light is on a seperate circuit then the brake lights.

Does anyone know if there is a relay or something else in the 3rd brake light circuit that might be cauising this?

I'm not good with electrical diagrams.

I disconneted the harness from the bulb, so my battey won't drain.
 

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Discussion Starter · #3 ·
I found a wiring diagrahm @ Matheisvolvo.com
Looks like I will start with the brake switch at the brake pedal 1st.
 
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