ok... I know I'm not the only one with this issue... My windsheild wipers turn on all by them selves and I don't want to replace the whole system... so if anyone knows from experiance, it will be appreciated.

is it the wiper circuit board, the switch in the stearing column or a short in the motor?

Thanks.

im also having some phantom wiper issues, however i in no way have answers.
i recently put a new steering column in my car and now they wipe as soon as i start the car and that never happened before!

I looked at the electrical diagrams and those seem to be the only parts in the circuit... but each one is about $70-$90 and I don't want to end up going through all 3. If it was the column... yours is probably a short in the switch....

25 yrs experience says its the circuit board.......of course 35 years experience says it could be sometyhing else......LOL

Just kidding.......should be the circuit board

Phil

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87 FIERO GT 2.8 5spd
0-60 in 6.8 seconds!
If you found my advice helpful, please take the time to give me a positive rating. Thanks

Anyone have a link to the windshield wiper motor circuit? Haynes doesn't seem to have it.

If it wipes on bumps, turn signal applications, or whacking the steering wheel, then most likely it's a bad switch in the column. At least, that was the case with mine.

JazzMan

Do they turn on when you use your turn signals? Mine did that, I replaced the multifuntion stock hoping that would cure it, but it the wipers still wiped when I used my turn signals. I recently replaced the expensive (over $100) windshield wiper switch inside the steering collumn. The windshield wipers now only wipe when I want them to, no more ghost wipers!

-Jeff

There is some info at Oliver's site

http://www.fieros.de/en/articles/wiper.html

quote Originally posted by spark1: There is some info at Oliver's site http://www.fieros.de/en/articles/wiper.html

Thanks!

Mine does the same, it turns on when I turn my key to the on position. Don't mind, it only does 1 wipe.

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Olorin Beta: 1986 Pontiac Fiero
4 cyl 2.5L Stock
5 Speed Manual Transmission
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Here's another site. Look for "Ghost Wipers".
http://chuck.kichline.com/fiero/fiero.htm

Had the same problem on my '85. It turned out to be the "park" switch, in the wiper motor proper, was pitted and oxidized. Took a point file to it, cleaned it up and no more problems.

The hardest part was getting the motor apart (drove the rivets through) to get to the switch.

Whew! All these instructions are a lot of work when all you have to do is change the circuit board on the wiper motor that is located under the hood. Good call, GTDude!

Were is a good place to buy a circut board?

Found the source of “phantom” wiper operation on my 88 Fiero. Knew it was the circuit board causing the problem but was curious about which component was faulty. Turned out to be a large diode labeled “CR1". The diode was conducting in the reverse direction causing the timing capacitor (C2) to slowly charge enough to trigger one operation of the wiper every ten minutes or so.

Like everyone else I couldn’t find a drawing of the wiper circuit so I cut and pasted one together as shown here:
http://members.cox.net/2dry4u/fiero/wipers/delaywiper.html

[This message has been edited by spark1 (edited 05-05-2004).]

Here’s a schematic of a 1988 Fiero wiper control board associated with the wiring diagram posted earlier. The board assembly number is 22062693, revision “1" so it may only be found on the 88's or maybe only on some of the 88's. I think GM redesigned the control board many times during the eleven years it was used (1984-1994). Another board I have, (from a 1993 Sonoma) assembly number 22093948, revision “B” is designed differently. But, the boards are interchangeable.
http://members.cox.net/2dry4u/fiero/wipers/cktbdschm.html

[This message has been edited by spark1 (edited 05-05-2004).]

I replaced the wiper switch and the module under the hood using parts off eBay for less than $30. I see the delay motors, (which include the circuit) there all the time for $10. The wiper switch couldn't have been more than $20.

Be careful of used wiper switches from anything other than a Fiero. Many cars use the same wiper motor and control board but the wiring harnesses are different and the switch functions come out on different pins.

[This message has been edited by spark1 (edited 11-29-2003).]

S10 parts are a direct fit, easy to come by too. The only differance is that the wires to the switch are a couple inches longer. Motor and delay board are identical.

I had this happen once, my wipers would come
on when I turned the car over.

I had to wash out the inside of the front
compartment and got the large connector next
to the heater blower motor housing and the
brake housing, wet. The one on the fire wall,
right above the A/C orifice valve. I tried
to dry it out with a hair drier, but
couldn't get it to work. I just had to wait
a few days for it to dry out. So I
disconnected the motor for those few days.

The point is that you may try to play with
that connector a bit a see if there is a
short/resistive connection being made to
another wire. There is a screw that holds it
together and has about 40 wires it connects.