I have a 1989 Chevy S-10 blazer that the wipers do not work. The wipers are the pulse system. I have power to the motor/printed circuit board. The washer pump motor does not work either?? From what I can find, there was/is problems with hair line cracks in the pcb on the gen 1 blazers!!! I have the board out, but can't see any cracks, corrosion? I need some help before I start throwing more parts at this thing please!
Here's a video, maybe this can help: http://www.youtube.com/watch?v=eX0EcG8QkYA The washer pump may be bad, it happens and the only way to verify is to see if you have power to it too.
Thanks, I'll have to send the you-tube link to my wife's computer, my corn puter lost all of the audio a few months ago. That is on my to do list as well.
I'm thinking the same thing. Rock Auto has new ones in their Dorman line for $24.00. May just do it and be done with it.
If you can solder, it's an easy fix. Pull apart the modle, the two big power supply solder joints on the board crack. Clean, re-flow the solder. done.
Thanks, I have all the solder toys, including silver solder. I've inspected the board pretty thouroughly IMHO, and I can't see that there are any cracks in the solder. Even using a magnifying glass. So I ordered a new board, so we'll see what happens from there! Thanks
As has been mentioned, replace module or repair the circuit board. In the 80's & 90's, Delco in Kokomo IN, was rolling millions of crappy circuit boards out the door. These where usually found in the ECM of just about every GM ever made. There was actually an "unofficial" diagnostic step most GM mechanics performed on intermittent drivability and electrical problems in that era. It was called the "tap" test. Take a wooden handle and "tap" the suspect component. We had faulty ECM's and modules stacked like cord wood in in the warranty return room.
Yeah, in the aftermarket repair business we gouldn't get replacement EMC's to fill the pipe line fast enough. Then there was the PROM nightmare of trying to keep up with that game. That was when I coined the name AC Velcro! Peel off the defective unit an velcro/stick on a new one in its place!.
That's a good one! And when you replaced an ECM, you hoped the first two you got from the parts department weren't as bad as the original.
I just repaired a rear wiper motor on my newer GM. Not ACVelcro, it is a Bosch "made in Brazil".:eek1 Took a rather large hammer to get the wiper shaft out of the case, then clean the corrosion, lube and reinstall with large zipties to hold it against the glass. The threads for the bolt that tightens it on the glass/grommet have rotted away.:eek1 $200.00 for a Brazilian GM replacement or $100.00 chinee, I made either $25.00 an hour or....$50.00! Took 4 hours in the rain!
Make sure you've got a good ground. I've had to add a ground wire from the motor housing to the cab chassis on more than one occasion. Easy to do and cheap, before exploring other options
I had to do that on an '85. Replaced the stalk, but that didn't have the switch in it, so then had to replace the switch. The stalk was crappy anyway, so I didn't mind having a new one. My '88 would get weird in dust storms (random single swipes with the wipers turned off), but I sold it before getting around to fixing it.
