Rear window wiper and washer suddenly stop working

Also note that the rear wiper/washer control has a "lock out" feature...that's what I call it. Each time you start up the engine, you have to turn the wiper/washer off and back to on to reset it's function. GM doesn't want you to start the engine, and have the wiper come on unintentionally while frozen to the rear window, and burn out the motor. So reset it by turning it Off then On to reset it. Tell me if that works.

On our platform, 2 things I'd look out for. Like the previous guy said, open the liftgate, check the rubber grommets up top and look for freyed or broken wires. On the water, operate the rear washer, do you hear the pump? Front and rear pumps are located on the front of the windshield wiper fluid reservoir. If you do hear the pump, go lift the liftgate and look for water at the latch. I myself have had the tube pop off the back of the nozzle, it's too short, which will spray water inside the gate. I just lengthened the tube, done deal.

Hornet_2497 I do appreciate all the advice from you as well as the others I did manage to check all the fuses they were all good. The fuse box under the rear seat with the fuse number 9 that operates the rear wiper motor is actually a 15 amp 4 volt automatic reset circuit breakers and I cannot find one anywhere in my city. However I did start my truck turn on the rear wiper switch and check to see if I was getting power to that fuse and I'm not. Would it be such a switch is bad? Please get back with me ASAP I do appreciate it you guys are very helpful

Btw I did get the rear washer pump going it was a bad fuse.

That's a tough question. Since the switch is the only thing left in the circuit, I would suspect the switch is bad but I can't be sure. If it's very expensive, you may want to devise a test of some kind before replacing it.

I can't be sure on what's really going on with the rear wiper motor system. Sometimes they work sometimes they don't but with that being said I don't know where I'm losing power. And trying to test 4 power when the system isn't working properly is impossible. Are you there. A loose ground or a short and one of my wires. Finding out which one that is is probably going to be out of my capabilities. If you do have any other advise I'm all ears

Maybe it's the wiper motor failing. Motors will cut in and out before they give up altogether. Your Trailblazer is fifteen years old so maybe it's done. You can power it directly to see how it behaves. Or check the price of a replacement.

Could be the pulse board is bad, it's attached to the motor kinda a light beige color it is plugged into the motor unit.

Thanks for your help guys. Found a broken orange wire in the hinged hatch grommet.

I'm having the same issue. Can you provide a pic of the broken wire location?

On the bottom of the wiper near the wiper connecting rod to wiper... disspienceses water

How do you check the windshield wiper on the rear if it’s the motor or the switch 03 trailblazer