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Back up lights does not work on my 90 modle 240 gl
I am having the same trouble. My brake lights work with the light switch for nighttime driving, but only far right brake light works when i pres brake pedal. Reverse lights dont work at all. Turn signals and hazard light work.
Check wiring for 12v also the brake switch on the brake pedal.
One for brake lights, one for cruise control. If you hit the brakes when using cruise control, that second switch is what tells the control modules that the brake is being depressed.
DoT 4
The 1991 Volvo brake light relay switch is located beneath the drivers side dashboard. The brake light relay switch will be above the brake pedal.
Above your left Knee when you are driving
They have a bad ground, if you notice all the other lights back there will be dim also. You need to track your ground wire or check your light bulb socket and make sure its getting a good CLEAN ground.,
you are wearing the seatbelt.
i am trying to find out my my back lights are not all working
They should turn off when the ignition is turned off and the key removed.
long answer: yes