I am not getting any power to my washer pump. It is grounded, and it works if I run a jumper wire to it from the battery. But it doesn't work when I use the switch inside. This is on an 85 Iroc.

I have been looking at the wires, and am confused. The wires that attach to the motor itself don't seem to be the same color as any of the wires that come out of the column. Is there a relay or anything else inline between the switch on the column and the washer motor that could have gone bad? I have searched, but haven't found anything about this particular problem.

 

Take a look at this link...you will need to scroll down to the bottom of the page and pick either the 84 or 86 off site links. You will find colored wiring diagrams at both site for both the pulse and non pulse wipers.

http://www.austinthirdgen.org/index.php?pid=19

Have you checked the wiper fuse in the fuse block????? If the fuse is ok then you might want to get a volt meter, disconnect the connector at the wiper motor and see if you are getting voltage on the various wires when the wiper switch is closed in that position.

Dave

 

I have checked the fuses, and all are fine. I am having problems with the washer pump not turning on, but you mentioned the wiper motor itself. I have also read two other articles on here that talk about the wiper motor. Do the wires from the interior switch all go to the wiper motor, and then a couple down to the washer pump?
If this is the case, is there a relay or anything else on the wiper motor that could go bad and cause the washer motor to not get any current?

 

OK

After rereading your first post, I assume that your washer pump is located in the washer fluid reservoir. It should have a RED and a DR BLUE wires from the motor back to the wiper motor assembly. Disconnect the RED wire at the washer pump connect a voltmeter between the RED wire connector and ground. Have a friend close the washer switch on the turn signal lever in the car. Do you have 12 volts with the switch closed? Likely not as your pump does not work.

OK Now trace the RED wire back to where it connects to the wiper motor assembly and repeat the same test. If you are not getting 12 volts on the RED wire terminal then you likely have a problem inside the wiper motor assembly. You will need to replace it with one for a 1988 or later third gen car.

GM changed the location of the washer pump in 1988. Prior to that it was located inside the wiper motor assembly. After that it was located in the fluid reservoir. Sounds as if a PO redid the wiper and washer pump in your car.

For your setup the washer pump gets it power from the wiper motor assembly. Visit the same link in my first post and look at the body wiring for 1988. ( you need the second figure, body wiring continued) Look down at the bottom of the page and you will see that the washer pump is powered from the wiper motor assembly. You can also look in the Hanyes manual, page 10-22.

Hope this helps you fix your problem.

Dave

 

This info will help, but let me describe the system a little more. The Washer bottle is a stand alone, with no pump in it. There is only a tube that goes into it with a filter on the end of it. The washer pump is attached to the inner fender. It has two wires going to it. One is immediatly grounded, and the other wire should send power to it.

From what you have said, it sounds like the power wire that goes to this comes from the wiper motor, and there is some type of central board on there that controls this and sends the power to the pump. I will begin tracing wires and looking for 12V upline from the pump. I will post my results.

Is there anything different I should be aware of knowing that I don't have an in-tank pump? Also, I don't know if it matters, but I have a delayed wiper system.

 

maybe a bad connection somewhere?
or a bad wire. i would just clean up the wires and see what happens.
it says it doesnt work when you try the switch inside. maybe the switch thingy isnt getting connction. or the switch is hooped.

 

Yes, the other wire should supply power to the pump. I expect it will be connected to the wiper motor ASSEMBLY, not necessarily the motor itself. You will need to trace it and see where it goes and what it is connected to.

Delayed wiper system will not effect the operation of the washer pump motor, it just complicates the control electronics inside the wiper motor assembly. You should be aware that you do not have a factory installation with the inline washer pump motor. Some one modified the installation. What is not clear is what wiper motor assembly is in you car. The 1987 and earlier (with a washer pump included) or a 1988 and later with the washer pump located in the fluid reservoir.

So trace the power wire and make sure all the connections and terminals are solid and clean, and connected. No telling what you may find from a proper terminal lug connection to tow wires twisted together with out any tape or heat shrink around them.

Let us know what you find.

Dave

 

I had an 86 Iroc Parts car that was just like my 85. I have a tank with no pump in it. The washer pump on both vehicles was mounted to the inside of the drivers fender. The pump on both cars was held in place by a bracket that bolted to the fender. I am pretty sure this was factory, unless both cars were modded the same. I will let you know what I find with the wires.

 

Well they could be factory original, I don't know for sure. All of the wiring diagrams I have seen on line for the 85's and 86's show the washer pump inside the wiper motor assembly.

I could well be that GM changed the parts and how they were installed and the wiring diagrams were not updated to match.

Yes, let us know what you find.

Dave

 

Well, I finally had time to work on it and figure it out...no wonder I wasn't getting any power to my washer pump when I used the lever, I was testing the wrong washer pump.

The washer pump I had on the inner fender is the one for the rear washer, which has been deleted. I found the front washer pump up inside of the wiper motor housing cover. I tested it, and it was dead. I repaced it and I now have washers! Thanks for all of your help.

 

I never even considered a rear washer pump Yes I was an option but I don't think it was very popular...

Good to hear that you were able to spend a little time looking at your problem and getting it fixed...

Dave

 

I just replaced the washer pump in mine and I still don't have washer fluid shooting out. I'm wondering how to proceed myself.

 

I'm having the same problem with my 87 IROC. The wipers work but no fluid coming out whenever I engage it. I wonder if this is what this connector is unplugged for?? Some said this hooks up to the plenum.. whereas I checked and it already has one plugged into it.