Wiper Problem

[86Hoopty]

So I screwed around with the wire spaghetti behind the dash in my 86 c1500. Problem is, now my wipers won't work, I'm not sure if I removed something I shouldn't have. I'm just curious if anyone knows what is included in the whole wiper system (switch, motor, etc.) Any help would be appreciated

[Front Range]

What exactly where you doing under the dash, cut anything, splice anything, or unplug anything?

Wires should run from wiper switch to fuseblock to wiper motor. According to the wiring diagram in the Haynes manual the wires coming off the wiper switch should be colored:

Pink
Purple
Black
Gray
Black w Light Blue Stripe

It's possible you disconnected a ground wire or jerked the wiper plug loose. Might want to trace those wires and see what you can find.

[86Hoopty]

Thanks, I'll take a look, I got rid of my cruise control and the little ignition computer. I had heard about a pulse module for the wiper system but had no clue what it was haha

[Front Range]

Might think about checking your fuse panel if you didn't already. It's possible you caused the wiper switch fuse to "pop" when messing with the wiring.

[86Hoopty]

So I've replaced the motor. Still nothing. I checked with a test light, power to all 5 wires connected to the motor when the switch is on, this doesn't seem right.

[ray_mcavoy]

Originally Posted by 86Hoopty

So I've replaced the motor. Still nothing. I checked with a test light, power to all 5 wires connected to the motor when the switch is on, this doesn't seem right.

That could be normal to have power on all the wires like that if the switch were OFF. That's because the switch is on the ground side of the circuit. Power is fed to the motor via the white wire. And the switch grounds either the gray wire for low speed or grounds the purple wire for high speed. The other gray wire & the black w/light blue stripe wire go to the park switch.

Anyway, with the swtich off, the connections to the gray & purple wires are open so you'll see voltage on those wires coming through the motor windings.

Seeing as how this is happening with your switch ON, I suspect you have a break in the wiring somewhere in between the motor & switch. Like Front Range said, check to see if you accidentally pulled the plug loose from the wiper switch. And if your truck has delay wipers, there is a module that is wired inline with the switch (it's usually located right under the steering column). Check to make sure that is still plugged in as well.

[ironroad9c1]

I have something weird too.. when I start the truck, the wipers automatically come on for a couple of wipes and then stop but don't park.