I have a 90 Full size blazer with the 5.7. My rear window motor doesn't run at all from the dash or from the tailgate itself using the key. Is there a way to check the motor itself so I can start eliminating things. Also, is there a fuse that in the panel that deals with the rear window motor. Thanks.

Billy

 

Check your fuse block under the dash first, then also when you try to cycle the back window can you hear the motor engaging at all??

 

Do you know what the fuse is labeled. I haven't seen one for windows at all. Is it labeled something else. As of right now, the motor doesn't make a sound when using the switch on the dash or the tailgate key switch.

 

The power windows should get power from a 30 amp circuit breaker labelled PWR/ACC .
There is also a cut out switch in the tailgate mounted behind the tailgate latch. The power wire should be pink to the dash switch, then light blue from the switch to the cut out switch, light blue from the cut out switch to the motor.The other wire is tan from the switch to the window motor.
Tan is for power up and light blue is for power down.
Check for broken wires between the truck body and the tailgate and corroded wire terminals behind the tailgate latches.

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Corrosion can kill alot of electrical systems!!! That was going to be my next suggestion!!