Fixing wiper delay

[granatl]

When you live in a city with 300+ sunny days a year, wipers aren't all that important.
Even so, I got caught in the rain the other day and noticed that when I chose anything in the wiper delay range, my wipers would stop where they were at, and not ever move. Then if I flipped to low or high, they would work as expected.
So I'm thinking the capacitor for the delay is bad or disconnected. Can anyone tell me what/where to look for it?

 

[stickybones]

When that happened to mine, I replaced the wiper motor cover. P/N 22039684...$45 from URL=http://www.gmpartsdirect.com/]GM Parts Direct[/URL] . There's some gizmo in the motor cover that controls the intermit wiper function.

Mike

 

[Ken Cunningham]

What Stickybones said. I replaced mine with a junkyard part (lots of GM cars used this motor). There are a lot of electronics in the cover. As I recall, another symptom of the motor cover failure: if the washer/wiper doesn't activate the wipers, then the new cover will correct both problems.

 

[chevyII]

ditto

 

[granatl]

Thanks for the info. I'll look there this weekend.
I have no idea if washer motor works or not. The tank was converted to alky a long time ago.

 

[salvageV6]

You need to do a resistance test at the wiper motor connector.

1. Connector disconnected from wiper motor.

2. IGN Switch OFF.

3. Neg. battery cable disconnected.

4. Wiper Switch LO

5. Measure with a good ohm meter between C+D Dark Green and Pink wires. Should be about 24K ohms, that's 24,000.

6. Move wiper switch through the delay range to max. delay position.

7. Measure resistance between C+D again Dark Green and Pink wires. Should be increaed to 1.2 MEG Ohms. 1.2 MILLION.

First test in troubleshooting.

 

[Vendor Defendor]

mine does the same thing, i changed back part of it about 3 times, still dosent work

 

[salvageV6]

See the first troubleshooting test above.

Could be the wiring in the stalk or the switch or the wiring from the dash to the motor.

Not always the wiper motor delay and park stuff in the motor cover.

 

[bd1320]

You need to do a resistance test at the wiper motor connector.

1. Connector disconnected from wiper motor.

2. IGN Switch OFF.

3. Neg. battery cable disconnected.

4. Wiper Switch LO

5. Measure with a good ohm meter between C+D Dark Green and Pink wires. Should be about 24K ohms, that's 24,000.

6. Move wiper switch through the delay range to max. delay position.

7. Measure resistance between C+D again Dark Green and Pink wires. Should be increaed to 1.2 MEG Ohms. 1.2 MILLION.

First test in troubleshooting.

On test number 5. mine is 28K ohms.
On test number 7 mine is 0. OK, now what do you think is wrong or what should I test next?

 

[salvageV6]

At what point does the delay vary from having resistance in the 28K or higher down to the 0 ohms or a short?

As soon as you move the lever to turn it off of minimum delay?

Midpoint in turning it or near the end of travel?

If right off the min. delay it sounds like a bad switch, can still be a shorted wire in there as well.

Resistance should increase while rotating the stalk delay ring. Not drop to a shorted reading.

Do they work in delay when you set the control to the 28K reading postion?

Also double check your test wiring and try it again to make sure the meter leads didn't short to each other or ground etc. during the test.

 

[bd1320]

The ohm reading stays at 0 when rotating the stalk through the delay range. Low speed and high speed work fine I just don't have any delay.