Hi all, hope your all well, can anyone please tell me what this is and what it does, I have red / green and black wires , this looks to be high level brake light,   but for a Australian 300 according to the wiring diagram.

 

Mines UK, never had a rear spoiler brake light, I've get power to it at key position 1. 

I've bought a rear perspex strip with the tail light and looking to wire it up.

Thanks in advance 

 

D

 

 

It's a 2.2uF capacitor, part of the rear wiper circuit (see red circle below). For the 3rd brake light, you will need to run a +12v supply

from the rear o/s brake lamp back up to the tailgate hinge through the rubber concertina for the existing wiring harness and down

to the 3rd brake light. You can earth the lamp on the rear wiper motor earth.

Super duper star, thank you so much, was hoping It wasn't needed and I could hi jack it , it's gonna be a right pain threading a cable through the tailgate! 

 

Thanks again