Tinkering - The 1947 - Present Chevrolet & GMC Truck Message Board Network

apstguy · 04-11-2003, 11:39 PM

I was screwing around with the truck today and FINALLY got my wipers off!!! YAY! I used a screwdriver and a hammer. I got my cowl off to clean the vent and lube the wiper linkage.

I decided while I'm under there, I may as well test the washer pump to see if it works. I took it out and wired it directly to the battery and it works. I hook a multimeter up the the power leads and turn on the ignition. -10 volts?!?!?!? Uhh... That isn't right! I switch the leads and it says a good constant 12 volts on when the ignition is on. WTF? The motor doesn't work when hooked up to the harness. Hmm.... so the wiper module is bad or the switch is bad. The more I think about it I think it is the switch. Guy at Smith Cheverolet said alot of 80's S-10s had to have the wiper switches replaced because they had this problem. A diode would fry and kill the switch. I need to replace it anyways - the chrome is wrinkled and bubbled.

I did find my ground strap to the engine. I actually have one - YAY! I also found that ground spade on the e-brake. DUH! It is huge! How did I miss it?

There is a little box on the firewall that has wires and a vacuum line going to it - is this the engine vacuum sensor? Maybe a cruise control thing? I'm just curious . . .

CRRoy71 · 04-11-2003, 11:57 PM

Where is the wiper module, that will be the next thing I try to replace.

apstguy · 04-12-2003, 12:05 AM

Directly under the steering column. Take off the plastic trim and the metal piece that is directly under the column. It looks like a little amp - it has a large silver heatsink on it so you can't miss it!

CRRoy71 · 04-12-2003, 12:08 AM

Cool, I had to move that out of the way while I was changing out my switch. Very easy to get to. Guess I'll try that next.

apstguy · 04-12-2003, 12:11 AM

That is the only thing I think it can be now. New switch didn't work, washer pump works, and the only other thing hooked up to the wiper system is that module. I REALLY hope that is the problem so I can fix mine too!

apstguy · 04-12-2003, 12:18 AM

Hey! I just notice I have 4.2 average posts a day - someone might think I'm a post whore like "other" people on this board. ::cough Dave cough:: Who could get 11??? They must be motor mouths (or in this case fast typers)

Mike76251 · 04-12-2003, 03:48 AM

Tyler,
I hope you can get a better deal than I did for that wiper module if you are going to buy one.
I have the delay wipers and that was out when I bought my truck.
I for one don't like to have something on a vehicle and it not be working....ANYTHING.
I went down to the local Chevy place and got a new module and it was like $65 or so.
I thought that was a little high for a "simple" circuit board with a .03 cent 555 timer on it.

BTW: I have a average of 12.6 posts a day.
Does that mean I should go look for a typing job?

Blue Beard · 04-12-2003, 08:48 AM

It' not that hard to get a lot of post in a day.

By the time you go thru the emails received and new posts it adds up very quickly.

apstguy · 04-12-2003, 03:35 PM

$65 is better than the new wiper/turn/CC switch the local place quoted me for $170!!! Ouch!

Mike76251 · 04-12-2003, 05:16 PM

Quote:

Originally posted by apstguy
$65 is better than the new wiper/turn/CC switch the local place quoted me for $170!!! Ouch!

OOOOOOOOUCH INDEED!!!!!
Get your butt to eBay and get one!!!!!
They are MUUUUCH cheaper there and probably only one company makes them.
I put a '87-9? on my '84 'cause mine did not work when I bought it.
It was a breeze to install and only cost me around $40.
GO NOW!!!!!!!!!!!!!!!!!!! LOLOLOLOL

04-11-2003, 11:39 PM	#1
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,087	Tinkering I was screwing around with the truck today and FINALLY got my wipers off!!! YAY! I used a screwdriver and a hammer. I got my cowl off to clean the vent and lube the wiper linkage. I decided while I'm under there, I may as well test the washer pump to see if it works. I took it out and wired it directly to the battery and it works. I hook a multimeter up the the power leads and turn on the ignition. -10 volts?!?!?!? Uhh... That isn't right! I switch the leads and it says a good constant 12 volts on when the ignition is on. WTF? The motor doesn't work when hooked up to the harness. Hmm.... so the wiper module is bad or the switch is bad. The more I think about it I think it is the switch. Guy at Smith Cheverolet said alot of 80's S-10s had to have the wiper switches replaced because they had this problem. A diode would fry and kill the switch. I need to replace it anyways - the chrome is wrinkled and bubbled. I did find my ground strap to the engine. I actually have one - YAY! I also found that ground spade on the e-brake. DUH! It is huge! How did I miss it? There is a little box on the firewall that has wires and a vacuum line going to it - is this the engine vacuum sensor? Maybe a cruise control thing? I'm just curious . . . __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

04-11-2003, 11:57 PM	#2
CRRoy71 Registered User Join Date: Feb 2003 Location: Mont Belvieu, TX Posts: 852	Where is the wiper module, that will be the next thing I try to replace. __________________ Chris '92 ext. cab s/b 4.3L "Sparky" '04 crew cab 2500 4x4 6.0L

04-12-2003, 12:05 AM	#3
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,087	Directly under the steering column. Take off the plastic trim and the metal piece that is directly under the column. It looks like a little amp - it has a large silver heatsink on it so you can't miss it! __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

04-12-2003, 12:08 AM	#4
CRRoy71 Registered User Join Date: Feb 2003 Location: Mont Belvieu, TX Posts: 852	Cool, I had to move that out of the way while I was changing out my switch. Very easy to get to. Guess I'll try that next. __________________ Chris '92 ext. cab s/b 4.3L "Sparky" '04 crew cab 2500 4x4 6.0L

04-12-2003, 12:11 AM	#5
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,087	That is the only thing I think it can be now. New switch didn't work, washer pump works, and the only other thing hooked up to the wiper system is that module. I REALLY hope that is the problem so I can fix mine too! __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

04-12-2003, 12:18 AM	#6
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,087	Hey! I just notice I have 4.2 average posts a day - someone might think I'm a post whore like "other" people on this board. ::cough Dave cough:: Who could get 11??? They must be motor mouths (or in this case fast typers) __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

04-12-2003, 03:48 AM	#7
Mike76251 Senior Member Join Date: Mar 2003 Posts: 2,499	Tyler, I hope you can get a better deal than I did for that wiper module if you are going to buy one. I have the delay wipers and that was out when I bought my truck. I for one don't like to have something on a vehicle and it not be working....ANYTHING. I went down to the local Chevy place and got a new module and it was like $65 or so. I thought that was a little high for a "simple" circuit board with a .03 cent 555 timer on it. BTW: I have a average of 12.6 posts a day. Does that mean I should go look for a typing job? Last edited by Mike76251; 04-12-2003 at 03:52 AM.

04-12-2003, 08:48 AM	#8
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,831	It' not that hard to get a lot of post in a day. By the time you go thru the emails received and new posts it adds up very quickly. __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

04-12-2003, 03:35 PM	#9
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,087	$65 is better than the new wiper/turn/CC switch the local place quoted me for $170!!! Ouch! __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

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