Electrical issue...stumped??

FordPowerStroke1986 · #1 (**permalink**) 03-23-2011, 02:32 PM

I just bought a used 99 f250 psd. Was told by the previous owner that the wipers were stuck on so she pulled the relay brought it to a dealer and was told she needed a new gem module. Ok I just replaced it and guess what. It don't work. I'm clueless. I have the washer pump coming on when I turn the wipers on but no wipers at all. It's snowing and late so I will check voltage at places tomorrow.

**Kitten7.3L** · #2 (**permalink**) 03-23-2011, 02:57 PM

Sounds like the wiper switch on the steering column is bad. Contacts for washer pump could have shorted together while wiper position switch has open. I would start by checking for power at wiper motor with wiper switch on first though. Should be a simple diagnosis.

FordPowerStroke1986 · #3 (**permalink**) 03-23-2011, 03:07 PM

Ya but if I have power there or not I still have an issue with the washer staying on. How hard is it to check the switch

**Kitten7.3L** · #4 (**permalink**) 03-23-2011, 03:25 PM

True. My thinking was that it is possible that the motor could also be bad. If you have power at motor? This would be a simple check. Your switch would be the prime suspect. As for checking the switch..... When I get home(if) I will look at the schematic for you. Unfortunately I am stuck at philly airport waiting to get back to ga. Will be tomorrow before I can look it up.

**Kitten7.3L** · #5 (**permalink**) 03-23-2011, 03:29 PM

Btw... I highly recommend this resource. I have it on all our vehicles. ALLDATAdiy.com :: Leading Source of Diagnostic and Repair Information

Zaairman · #6 (**permalink**) 03-23-2011, 06:51 PM

You probably need a new multifunction switch. They go out all the time.

FordPowerStroke1986 · #7 (**permalink**) 03-29-2011, 02:17 PM

Finally fixed my wiper problem!!! Marcotte ford in ma sucks. They said it was the GEM module that I spent $400 on. Well they were wrong all it were was the multi function switch that cost me $40. Easy fix just wish I hadn't listened to the dealer.

**Kitten7.3L** · #8 (**permalink**) 03-30-2011, 04:12 AM

Glad to hear that! Hate that the dealer screwed you though. They make a good living that way. hard to trust mechanics sometimes when they are gettin' paid.

Lesson learned. We appreciate the update. Will keep someone else from getting the shaft.

**Kitten7.3L** · #9 (**permalink**) 03-30-2011, 04:15 AM

BTW.... if you still have your original GEM model you may be able to advertise it for sale. Maybe then at least you can recoup some of you money.

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