Like the title says, my wipers only work on high and stay where they are when I shut them off. I called the dealership and the ("new and improved part, original was discontinued") lists at $330.

Also the blower moter only works on high.

Any ideas? 1992, intermitent wipers, no A/C.

Thanks,
Joe.

 

Did both problems start at the same time? Usually when the blower motor only works on high it's the blower motor resistor.

 

Check the multifunction switch operation

Check the blower motor resistor and or connector

 

Forgot about the connector... they have a bad habit of getting hot and melting!

 

I bought the truck about three weeks ago. It came to me with these issues. I figured I would just get a new wiper switch, but the stupid thing costs an arm and a leg ($330 from Ford). I've been to a few bone yards but none of them have any 92s or older. Could it be as simple as a relay and can the switch be pulled apart and cleaned, or do you have to replace them when they give you trouble.

I pulled the heater resistor out and it's pretty corroded, so I'm gonna guess that's it. However, the connector is stuck together so that is another issue. I've never owned anything this new, so all this electrical diagnosing stupidity is somewhat new to me, wires going everywhere and whatnot.

I bought a Haynes manual, cause I was at Autozone instead of NAPA. The Haynes manual gives very little info about the 1992, (wiring diagrams and what-not), as well as very little info about the 3.0L engine.

Thanks,
Joe.

 

Get the parts from RockAuto... much, much cheaper than the dealer, even Motorcraft branded parts there are cheaper there as well. All of the brands they stock are good ones, so all you really gotta do is find what you need, and pick what you prefer.

The connector won't come apart easily because the terminals are rusted together... mine was melted badly as well. It took a lot to get that thing disconnected.

What I did is seal the back of the new connector with RTV to keep **** from getting into there... one place where a GM Weathertight connector would be very beneficial, as it is pointing the back of the connector towards the front of the truck, open to receive water, dirt, and crap like that. Unfortunately, they gave us the open back connector...

As for the wipers, I have a weird issue with them as well... when they are switched on, they will wipe consistently for a bit, then not wipe at all for a little bit. (not talking about the delay... it'll go wipe, pause, wipe, pause, wipe, pause, pause, pause, wipe, pause, wipe...)

It'll do it unless you have it on the full speed 'wipe the hell outta the windshield' settings. Also, the wiper arms are a little loose. Gotta tighten that up.

Well folks, out I go to fix that exhaust leak behind the cats, and inspect them as well. If they are starting to plug up or are plugged, off they come... (gotta love Michigan!)

 

Before you buy a new wiper control module, I'd try and find a used multifunction switch. Ref Click Link

Blower Motor resistor and connector Click Link