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wiper and washer problems
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jasont
Anonymous Poster
jteeguarden@msn.com
Apr 18, 2009, 5:14 PM
Post #1 of 5
(1683 views)
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wiper and washer problems
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88 GMC K1500 1/2 ton with 350 engind. Sierra with power windows/doorlocks and A/C. 183,000 miles. Windshield wipers have, over quite a long period of time, degraded in working. It is to point now where they come on as usual but don't stop after four wipes, stop in mid screen or wipe fifteen or twenty times before stopping where they are not supposed to stop. Washer performance has degraded also. Stopped working altogether last week. Replaced reservoir and pump assembly today. No help. Line seems to be clear; can blow through it and clear line of liquid. My next thought is to replace wiper motor assembly. The problem with the wipers started years ago when truck relatively new and was tied to washing enging at carwash. After every thing dried out from driving the wipers would work normally again. Dampness or rainy days seemed to be tied to this. Any ideas would be great as I want to keep the truck in operating order and this is a real pain in the behind. One note, the wipers come on when the switch is rotated. That part is ok, they just do not work right afterward. Is the washer tied to the wipers electronically? I am rambling now. Please help. Thank you.
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Double J
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/ Moderator
Apr 18, 2009, 5:37 PM
Post #2 of 5
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Re: wiper and washer problems
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Sounds like a Wiper Motor 'Pulse Board Module' failure to me.
Its mounted on the front of the wiper motor,simple to replace.Approx $30.00 at Autozone
And Yes,the washers are tied to the wipers electrically...thru this module...
Looks similar to this...
(This post was edited by JIM N on Apr 18, 2009, 5:40 PM)
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Guest
Anonymous Poster
Apr 20, 2009, 12:13 AM
Post #3 of 5
(1674 views)
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Re: wiper and washer problems
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Thank you very much for your helpful reply. I am guessing that is why replacing the washer tank and pump assembly did not accomplish anything. That part was probably ok, this board with the circuitry is what the problem is. OK.
Having looked at the wiper motor previously, and looked into how to remove the old and put a new one in, am I understanding correctly that the wiper motor itself does not need to come out, just the board that is attached to it. In other words, I can remove this board from the motor assembly from under the hood at the firewall where the motor is mounted and do not have to pull the wiper arms and plastic shielding under the arms to get to the portion of the wiper motor that is inside the firewall. Bear with me, a bit more help and I can do this. Thank you again.
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Double J
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/ Moderator
Apr 20, 2009, 6:25 PM
Post #4 of 5
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Re: wiper and washer problems
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Yes,thats correct!
You dont need to remove the Wiper Motor
It mounts right on the front of the motor.
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jasont
Anonymous Poster
jteeguarden@msn.com
Apr 22, 2009, 1:26 AM
Post #5 of 5
(1657 views)
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Re: wiper and washer problems
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Thank you again. I have it taken care of. A note you may be interested in. Apparently, my 88 GMC was an early manufacture and had a different style of wiper motor. The pulse module board I purchased from my local auto wrecker, the same one you pictured for me, would not fit. The front of mine was round. I actually pulled the board myself at the yard and failed to note any difference between the two wiper motors until I got home to install it. My guy at the yard said his software shows only one type of board for this truck;the square one. Today we theorized GM may have had a problem with the original motor initially and thereafter mounted an improved model that everyone shows in their software as the right part. He swapped me the board for the newer style of motor after we matched up the stud holes with measurements and plugging it in. So I ended up with a motor anyway which was not too bad to put in once I figured it all out and synchonized the arms properly after the install. Thank you again for your help sir!
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