Turn signals & hazard lights not working on 2000 Pontiac Montana
I have checked the fuses and they are fine. The lights, break lights and tail lights work fine. I have replace the rear tail light module and connector (a shop recomended I do this or they would for $300) and it is still the same. Is there a fusable link from the stearing column to the light modules? I do not have a shop manual for this vehicle. Thanks for your help.
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check for a bad ground wire for the tail lights. You are looking for a black ground wire near the bottom of the left rear corner of the car, inside. you may need to take the trim panel off to find it. if you take out the left tail light you should be able to follow the harness to where the black wires come out and a terminal is screwed to the body. turn on the hazard lights and when you get near the problem the lights will brighten and dim.
Check the brake light switch should be a orange wire with 12v then a white wire with 12v when the pedal is pressed.If htat cks good then ck the hazard switch by moving it up and down and wiggeling the knob with the brake pedal pressed if they start working then your multifunction switch is bad and needs to be replaced.
Check the left rear tail light assembly. They are very common to get water into them and corrode, causing electrical problems in the internal circuitboard. If the board is rotten, check with GM. You can buy the complete tail light assembly (including the circuit board) for less that just the board itself!!! Good luck!
the boards in the tail lights have issues the plugs melt and they screw up the grounds. if your dash light signal indicators or on steady at night then chances are you will need new harnesses and light board assemblies
We had the same issue with our 2000 Pontiac Montana.Brake lights, turn signal lights, running lights, back-up lights and emergency flasher didn’t work at all or operated at random. The cause: poorly designed aluminum contacts on the tail light circuit board and wiring harness connector arced over and disintegrated with normal use.
Pull the tail lamp assembly, remove the electrical connector and look for burned contacts on the connector plug and the connector socket (they call this long plastic piece with the socket the circuit board: it includes the four bulb sockets.Replace the circuit board and the wiring connector.
You can DIY this job with basic auto mechanical/electrical skills and tools. The two circuit boards and the two connectors set me back $230 (2009 cost) for new parts.The electrical contacts on the factory replacement parts are improved.
I needed a T-30 torx driver to remove the tail light assembly (you need this to change out bulbs, too), wire cutters, wire strippers, electrical tape and an electrical lug crimper to do the job.