Random Windshield Washer Operation
( I decided to start a new thread in an effort to consolidate all of the posts on this)
I along with others on here have experienced mysterious and random front windshield washer operation; driving along when suddenly the washers begin to pump fluid,and keep pumping until the tank runs dry, or until you cycle the ignition. My Tahoe is presently in the shop with this problem, and after speaking to the tech last night, I thought I post some facts that I know of at this time.
-Owners with the heated washer option are experiencing the problem.
-The control module,heater, and pump are one unit mounted up on the firewall on the far left side. The washer system is not on the GM LAN. It's a closed circuit consisting of conventional wiring.
-When the heater perforates the tank (and it will eventually) washer fluid seeps down into the control module, and wrecks the unit.
-Additionally, if you had the recall done, but not the tank replaced, washer fluid can run down that short harness and get into the connector pins destroying that too. So that must be examined for damage. Essentially, the recall adds another connector into the wiring.
-Finally, the tech did tell me that GM is swamped with this problem. There was no charge for the part($350), just the labor, so I am led to believe that this is one of those silent recalls.
My Tahoe is still there because after installing a new module and sending me on my way, it began to exhibit the same symptoms again. I returned, and left it there with the tech scratching his head. Gadgets are fun to have, but what a pain when they go bad.
Last edited by Hardin Thicke; 02-12-2009 at 08:00 PM.