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don t check fue,it is in the book,the fuse list, but better check on wipermotor, 3 wires,2 big one fine,check if pos and neg arive WITH THE HOOD CLOSED if pos and neg found,change wiper motor,it is disease,
The are contacts inside the motor assembly which are supposed to keep the motor running until the blades are parked; if the motor's just stopping in position wherever you turn the *wipers* off, there's a problem in the motor. If the problem is that the wipers don't park when you turn the *ignition* off, that's normal behavior. While it's theoretically possible to rewire the motor so that they'll auto-park when you turn the engine off, it's more complicated than just swapping a couple of leads, and requires adding some additional parts to the circuit; do it wrong, and the *engine* will keep running instead.
I notice all the boards you find on the web anymore are the somewhat rounded ones with a square plug. If it is the rectangular one you need with a flat 4 wire plug and one screw through the center holds the cover on, then you can search for this AC Delco part number 22039316 (my cost was $94.00). I think since the wipers don't have a park position like the cars with hidden wipers then this may be the same board.
I just went through this because I installed a later (90-93ish) S10 pulse wiper in a 84 S10 (factory pulse for the 84 had a knob on a module under the headlight switch)
The board I got is a genuine AC Delco board as well.
The dealer should be able to get these parts. I did not go through the dealer. I went to the shop where my brother works and they got it through a wholesale supplier of factory parts. This supplier supplys parts to the dealers around here as well.
You may also try Rockauto.com as well. I forget if they had the right board. But if they do, search the web for Rock Auto Discount codes and you can save some bucks.
The wiper motor is located in the wiper module under the front cowl cover. You can get one at pretty much any parts retailer that you choose. (AutoZone, CarQuest, Napa, O'Reilly's, Etc.) Your question also brings me to the conclusion that you don't even know for sure that you need a wiper motor. If you do not know where it is, there is no way possible that you could have properly diagnosed the reason that your wipers are not working. How do you know that the problem is not being caused by your multifunction switch or wiper relay? Replacing parts without diagnosing the system can be EXPENSIVE!!!
While the washer is activated check the voltage on the washer motor fitted on to the washer tank. If there is voltage then the motor is fault and needs to be replaced. If there is no voltage trace the lead for any break in circuit. Normally the fuse is common to both the washer and wiper.
This is a common problem with Chevy Venture, Olds Silhouette, and Pontiac Montana. The mechanical wiper drive and parking cam assembly, if it's not broken, needs adjustment. The spring loaded stop arm should engage the vertical tab on the assembly mounting plate when the wiper motor reverses. See pic.
I will upload the instructions to fix this problem, if there is interest.
1. check the fuse to the rear wiper motor
2. check for power to rear wiper motor at the motor (power wire going in to the wiper motor with rear wiper switch on)
If you have good fuses & have power going in to the rear wiper motor...
3. Pull old rear wiper motor and install a new rear wiper motor.
Thank you please drive thru......