Switch a known good relay from a working circuit into the non working circuit.
SOURCE: real right turn signal light - Pontiac Montana SV6 2005
If the 2005 Montana is similar to the 2001 Montana, I have a solution. First you'll need a hexagonal wrench (the 6-sided L-shaped wrench). The tail light assembly is held on by two screws. You'll need the hexagonal wrench to remove them, because a normal screwdriver won't do it. I also had to use a conventional adjustable wrench to get the leverage to turn the hexagonal wrench, because the screws were in there pretty tight. Once you remove the two screws, the whole tail light assembly should come off. Mine required a little force and I had to play with it a bit, but it came off without a lot of work. There will be one set of wires that connects the tail light assembly to the rest of the minivan--try not to damage that set of wires. Once you get the tail light assembly off, you'll have to take apart the assembly that actually holds the lights. No tools should be required. It's held on by four plastic catches. Just undo the catches (easier said than done, but still not too tough) and it comes apart. Then you can pop out the old light and pop in the new light. Then re-assemble. For me, it went back together much easier than it came apart.
SOURCE: 2002 Alero defogger
A common thing to fial on these- assumning the grid is ok, and wires are still attched to grid, is the rear def / antenna module. It is behind rt. rear quarter trim panel. The modules burn up, and also melt the connector. the module and connector would need to be replaced.
SOURCE: Power Windows Not Working...
take the switch apart and clean it check for power to the switch and also check the ground
SOURCE: the rear wiper stopped working. I suspect that
The fuse for the rear wiper is located in the interior fuse panel on the passenger door side of the dash. It is the 3rd one down from the top in the left column (#3) and it is a 15 amp.
SOURCE: 2005 pontiac montana SV6, last
never replace a circuit with a fuse that is stronger than what is asked for as you will then burn the wiring.i would get my hands on a wiring schematic and trace the problem with a tester.once found replace the bad wiring or relay with the right parts and you have succeded.
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