Mine won't work!! I blow fuse after fuse. I've unplugged the harness (to the wiper motor) and fuses still blow! I unplugged the wide harness to the motor and the gray and yellow wires are grounded out. Can anyone help me with this??

 

Well, since no one else posted anything, I'll try.

I don't know what vehicle you have, but according to my 1991 GM service manual, the yellow wire is only a jumper wire connecting the "park switch" (in the motor assembly) to the motor positive terminal for low speed operation. This equates to terminal "A" in connector "C1" being connected to terminal "B" in connector "C2" (both at the wiper motor assy.)

The grey wire provides power (+12vdc) to the relay coil of the park switch in the wiper motor assembly (low speed) as well as the solid state timer.

In short, +12VDC goes from the wiper fuse to the wiper switch assembly (steering column), then, via the grey wire, to the wiper motor assembly where it connects to the positive side of the relay coil for the park switch.

The purple wire connects to the high speed side of the motor +12.

To test, try connecting the motor to +12 separate from the cable harness.

The black wire ("C" on connector "C2") is ground.

The purple wire is +12 for high speed ("A" on connector "C2")

The yellow wire is +12 for low speed ("B" on connector "C2").

With the connectors disconnected from the wiper assembly, ignition "on" and the wipers on low speed, do you see +12 on the grey wire?

Now, do you see +12 on the purple wire when they're on high speed?

EDIT:

I just re-read your post. If you still blow fuses with ALL the connectors removed from the wiper motor assembly, I would guess something is grounding (or tapped into) the power wire(s) somewhere between the fuse and the disconnected connectors. You'll have to physically trace the wire to see if anything is grounding it.

I don't understand how the yellow wire is at ground potential since this wire should be "open" with both C1 and C2 disconnected. The yellow wire (according to the schematic) is only a jumper (as detailed above), so with both "C1" and "C2" connectors disconnected, this wire is "open" and you should have measured infinite resistance (neither positive or ground), since this wire is not connected to anything when the connectors are removed. If using voltage vice resistance to measure, you should have read zero (0) volts to either ground or positive 12 volts to this yellow wire.

All the above presumes your car uses the same schematic as my 1991 Camaro.

Does this help?

[This message has been edited by Stuart Moss (edited June 01, 2001).]

 

Yeah that helps a little more. I've got an 89 Iroc convertible. I'm going to go home and play a little more and see what comes up and compare 91 schematic with the 89. I'm going to look a little closer with the yellow wire. I'm afraid it may be the turn signal/wiper lever itself. I've heard of people having problems with these. Thanks.

 

You should find that the yellow wire just loops in the harness and goes from one connector to the other. A problem here would not cause a blown fuse with the connectors pulled. It sounds as if you have a short to ground someplace in the wiring between the fuse box and the wiper motor.

The switch is located in the column at the end if the stalk. It can be replaced without replacing the rest of the stalk. To get it out, disassemble the steering column down to just before the tilt joint, the part of the column with the stalk on it should be free from the rest of the column. Then to remove the stalk, you just pull on the end of it, it will slide off of a metal rod inside. If you have cruise, be very careful here because you will be pulling the wires to the cruise switch out thru the metal rod, you'll have to feed the wire thru to make sure it doesnt rip from the cruise switch. Once you have the end off, the part with the wash tab will just lift off. This will leave the metal rod in the wiper switch. Agian, it just pulls out. Then, there is a pin that the wiper switch pivots on that you need to remove to free up the switch.

Before you go that far, tho, try disconnecting the switch connector down by the bottom of the column. There are two flat connectors. The one for the wiper switch has 5 wires in it. With this disconnected if you are still blowing fuses then there is a short between the fuse panel and the connector. If you no longer blow fuses, then check for shorts to ground in the wiring in the column and in the wiring that goes from the column to the wiper.

Jeez long post, hope it helps.

 

Maybe this would help:



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"Let the bodies hit the floor!"
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