3rd Brake light help pls

[Guest]

Hi,

I have fitted my 3rd brake light but unfortunately I appear to be missing my 12v supply, I have tested the 2 cables and the brown tests as earth to the car chassis so I presume that the black wire should be the feed is this correct?

 

[Dave Wilkinson]

Pete,

Sorry - I missed that question in your e-mail. The light should be isolated since it is not grounded by any of the fixings so relies solely on the wiring. In reality it shouldn't matter since the light is a series of bulbs - not LEDs. Normally brown is used as earth/ground elsewhere in the car.

Hope that helps.

Dave

 

[968er]

Looking at the wiring diagram, brown is the negative and black is your positive which gets it feed from the black/red wire for the rear window.

 

[Guest]

how can that be? the black is + but surely that gets its feed from the brake light circuit? or am I missing something[&o]

 

[968er]

Pete,

I am not at home this week, but thinking about it you may be right. Will have another look when I get home at the weekend

 

[Guest]

William,

Don't worry all done fixed on and..........working[] the power was present on the inside contacts so it was just a case of running a wire from inside out if you know what I mean. Once I had got over the shock of having to drill a small hole in my roof line I was ok[] Apparently according to p-car this is a common problem although there fix is not as straight forward as it says[8|] there is no way you can make a hole between the rear glass and the seal for your new wire you have to drill above the rubber into your roof missing the sunroof motor obviously[&:]

Thanks for your help

 

[968er]

Pete,

Glad you got it sorted, are you going to post a picture?