Author Topic: Wiper issues  (Read 14436 times)

Offline 1967KaiserM715

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Wiper issues
« on: October 28, 2017, 04:08:06 PM »
Done a few searches, not really finding what I think I need to find, so here it goes-

Truck is a 1985 GMC K1500 6.5 TurboDiesel, original harness for most part, any extra wiring is tapped into separate circuits.

My problem currently lies with the wiper system, it has the delay wipers in the stalk on steering wheel. They did work all right at the beginning, but with the past few heavy rains, sometimes they work, sometimes they don't (like not moving in any setting.) And now the off don't work, to get them in the "down" position I have to play with the mist setting, as turning to off does not work at all.

Delay setting seems to have completely stopped working, seems to only really have the low setting in delay. And when they work, low and high seem fine.

I have looked at power at motor, seems to be fine there, but of course when I'm testing the wipers "work" and don't randomly stop.

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Current Vehicles:1985 GMC K10(Daily) 1991 GMC K2500(Daily) 1975 Beetle(not running) 1985 Mercedes 300D(not running) 1952 M35    1967 M715(not running)
 1986 Chevy K30(under repair)

Offline VileZambonie

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Re: Wiper issues
« Reply #1 on: October 28, 2017, 05:56:03 PM »
So take the delay module out of the equation, simply disconnect it and connect the two connectors together. Does low and high speed work normal after you do this?
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline 1967KaiserM715

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Re: Wiper issues
« Reply #2 on: November 07, 2017, 06:13:18 AM »
So take the delay module out of the equation, simply disconnect it and connect the two connectors together. Does low and high speed work normal after you do this?
Been very busy, but disconnecting delay module, low and high still work.

There seems to be no "park" setting for the wiper, which typically means a bad board on the motor.

Plus I'm not sure how mist is supposed to work, I have to hold it in mist and guess when it's close to down before releasing, otherwise it will stop anywhere.

With the way things are somewhat working, I'm guessing I have at least 2 separate issues I need to address.

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Current Vehicles:1985 GMC K10(Daily) 1991 GMC K2500(Daily) 1975 Beetle(not running) 1985 Mercedes 300D(not running) 1952 M35    1967 M715(not running)
 1986 Chevy K30(under repair)

Offline big_al273

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Re: Wiper issues
« Reply #3 on: November 07, 2017, 07:03:25 AM »
this sounds almost exactly like the symptoms my 88 had, i stated having to use mist to shut off the wipers and deal with a randomly failing delay but lo and hi worked fine, i got a replacement wiper delay module and no more issues. Mist when operating properly should give you a single sweep (or continuous as long as the switch is held) of the wiper blades and then park them back where they started, i know there is a park switch/sensor in the wiper motor that controls where the wipers park but i don't really know much about that. As for bypassing the delay module i did not know you could just plug those two connectors together without the delay module
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Offline VileZambonie

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Re: Wiper issues
« Reply #4 on: November 07, 2017, 04:11:34 PM »
You have the correct wiper motor and the washer pump in the jug?

Clean the connections at the motor, also pop apart the module and clean the connections. If the motor still won't park, replace the motor.

Quote
As for bypassing the delay module i did not know you could just plug those two connectors together without the delay module

That's all there is to it
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline 1967KaiserM715

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Re: Wiper issues
« Reply #5 on: November 08, 2017, 07:39:53 AM »
Yes, everything is correct, it worked fine the first few times, then got steadily worse, cleaning connections was actually my first step.

I'll pop the covers off and clean internal connections next. Snow is starting to fly, although I picked up a '91 K2500 as a winter beater, just finished rebuilding the 4l80e in that.

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Current Vehicles:1985 GMC K10(Daily) 1991 GMC K2500(Daily) 1975 Beetle(not running) 1985 Mercedes 300D(not running) 1952 M35    1967 M715(not running)
 1986 Chevy K30(under repair)

Offline VileZambonie

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Re: Wiper issues
« Reply #6 on: November 08, 2017, 12:49:24 PM »
The terminals have a tendency to be loose in the connectors at the motor so push the wires in snugly as well. I just had one with extremely high resistance at all of the terminals on the lower connector. I don't believe they make that pigtail so I just put new wires and terminals. Made a big difference.

PS The older I get, the more I hate snow and the winter. Please don't send the snow down to me.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Big Chip

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Re: Wiper issues
« Reply #7 on: November 08, 2017, 01:21:41 PM »
I used to have a similar issue with my 86 GMC. Mine would break the wires in the column because of the tilt wheel. Sometimes it was just the wipers, sometimes the cruise control and sometimes they took turns not working. I would replace the turn signal stalk and it would work fine for a while.


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Offline VileZambonie

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Re: Wiper issues
« Reply #8 on: November 08, 2017, 02:19:32 PM »
The only wires in the stalk are for the cruise control is equipped.
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Offline Big Chip

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Re: Wiper issues
« Reply #9 on: November 08, 2017, 02:37:56 PM »
It’s all on the same stall on that truck.


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Offline Big Chip

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Re: Wiper issues
« Reply #10 on: November 08, 2017, 02:47:30 PM »
My memory could be failing me but I changed the stalk for both reasons and fixed my problem. It’s been a long time so maybe my memory isn’t completely accurate?


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Offline VileZambonie

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Re: Wiper issues
« Reply #11 on: November 08, 2017, 02:59:59 PM »
Unless it has cruise, no other wires are in the stalk.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Big Chip

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Re: Wiper issues
« Reply #12 on: November 08, 2017, 03:21:06 PM »
Right on.


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Offline big_al273

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Re: Wiper issues
« Reply #13 on: November 10, 2017, 11:28:16 AM »
Unless it has cruise, no other wires are in the stalk.
Yup just tightened the tilt column in my 84 and the signal switch is attached to the stalk by a little metal arm and screw inside the upper tilting part of the column
91 Chevy R3500 Crewcab future project
89 GMC R3500 Cab & Chassis Tool truck project
88 Chevy V30 Crewcab Ex-firetruck
87 Chevy R20 Crewcab future project
84 GMC K1500 winter beater

Offline 1967KaiserM715

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Re: Wiper issues
« Reply #14 on: November 27, 2017, 06:13:33 PM »
Back at this, don't know how I got the deal, but got an AC-DELCO wiper delay module for cheap- 25 bucks free shipping through Amazon, it must have been one of their lightening deals, or a warehouse buy, cause I couldn't find it after. That did not solve it, nor did cleaning contacts.

To refresh, there is no delay of wipers, as soon as you enter delay it wipes with the same speed as low, low and high do work. There is no off and park function. Mist mode does not work, you need to hold the stalk, moving stalk to mist will move the wipers, but letting go stops wipers immediately, I have to move into mist and hold until the wipers are low on the windshield before I let go to stop the wipers.

I may have some time to actually work on this, as I lost my rear driveshaft on the way to work, no apparent cause, but slip yoke is seized to output shaft, broken ear on that, both straps on axle, but missing one u joint cap.....but anyways, back to wipers.

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Current Vehicles:1985 GMC K10(Daily) 1991 GMC K2500(Daily) 1975 Beetle(not running) 1985 Mercedes 300D(not running) 1952 M35    1967 M715(not running)
 1986 Chevy K30(under repair)