Headlights Tail and Brake Lights
Chevy G20
Volvo 240
Ford Escort LX

What could cause the brake-lights on a 1990 Volvo to work with the headlights off but not to work when the headlights are turned on?

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2008-07-08 18:24:01
2008-07-08 18:24:01

They are either the wrong bulbs or one of the filaments is burned out. The bulbs should have two filaments. One is illuminated when the lights are on. The other is brighter when the brakes are used.

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