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Third Brake Light On, Won't Shut Off

A mid-size luxury crossover SUV, the Volvo XC90 made its debut in 2002 at the Detroit Motor Show. Recognized for its safety, practicality, and comfort, the XC90 is a popular vehicle around the world. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America). P2 platform.
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VFLXC90
Posts: 59
Joined: 21 April 2012
Year and Model: XC90 V8 2006
Location: Joliet IL.

Third Brake Light On, Won't Shut Off

Post by VFLXC90 »

My 2006 v8, third brake light is on all the time.
All the lights work, come on when there supposed to, and turn off as well, except for the third brake light.

The third brake is on a different circiut then the other lights, for safety, designed to work seperate in case lower brake light don't work.

I was advised the ECm could have corrision in it.

Is there a relay that could be bad?

Is there a wiring diagram I could down load?

Any suggestions?
I un plugged the harness for third brake light so my battery doesn't drain.
08 XC 90 V-8 157,000 Spouse
06 XC 90 V-8 141,000 Daughter
06 XC 90 V-8 234,000 Son
03 V 70 2.5 Non Turbo

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