1977 High Speed Wipers
Thread Starter
3rd Gear
Joined: Jun 2012
Posts: 3
Likes: 0
From: Brisbane Queensland
1977 High Speed Wipers
I'm just finishing a ground up rebuild on a 1977 c3 that was in a 1000 pieces when I bought it.
I have low speed wipers working ok by turning the indicator stalk 1 click forward. And when I push the stalk in the washer pump works.
How do I get high speed wipers??
I have tested the wiper motor and it can do high speed ok.
I have low speed wipers working ok by turning the indicator stalk 1 click forward. And when I push the stalk in the washer pump works.
How do I get high speed wipers??
I have tested the wiper motor and it can do high speed ok.
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
My guess is that you have an issue with the dreaded 77 wiper switch. The reason I say this is for the motor to run on low, both the black and light blue wires must be grounded. When you remove the black ground, the motor should run on high speed.
I would maybe go to the switch connector and make sure all the terminals are making good contact!
The switch ground is good because none of the functions would work if it wasn't. It's probably the switch as bad as I hate to say it... Test the wires and see what is happening at the switch connector.
Here is a simplified schematic I just made... It was the only one I didn't have completed yet so I went ahead and finished it this morning.
I would maybe go to the switch connector and make sure all the terminals are making good contact!
The switch ground is good because none of the functions would work if it wasn't. It's probably the switch as bad as I hate to say it... Test the wires and see what is happening at the switch connector.
Here is a simplified schematic I just made... It was the only one I didn't have completed yet so I went ahead and finished it this morning.
Last edited by Willcox Corvette; Jun 18, 2013 at 12:57 PM.
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Joined: Apr 2013
Posts: 83
Likes: 0
From: Sequim Wa
I'm just finishing a ground up rebuild on a 1977 c3 that was in a 1000 pieces when I bought it.
I have low speed wipers working ok by turning the indicator stalk 1 click forward. And when I push the stalk in the washer pump works.
How do I get high speed wipers??
I have tested the wiper motor and it can do high speed ok.
I have low speed wipers working ok by turning the indicator stalk 1 click forward. And when I push the stalk in the washer pump works.
How do I get high speed wipers??
I have tested the wiper motor and it can do high speed ok.
Thread Starter
3rd Gear
Joined: Jun 2012
Posts: 3
Likes: 0
From: Brisbane Queensland
Thanks for the info but can you tell me what I need to do with the wiper switch to turn on high speed wipers?
The switch only feels like it only wants to turn forward one click. Should it turn further for high speed?
The switch only feels like it only wants to turn forward one click. Should it turn further for high speed?
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Yes the switch should click forward another click for high speed.... You didn't say in your first post you only had one click.
There is nothing I can do for you except tell you to tear apart the column and remove the switch to see what is causing the issue and that is not an easy project.
Willcox
Thread Starter
3rd Gear
Joined: Jun 2012
Posts: 3
Likes: 0
From: Brisbane Queensland
I had a quick look at my column this morning before work and I think my problem is the cheap re-po lever I have installed.
It looks like I have the same problem as found earlier by these guys http://forums.corvetteforum.com/1579967350-post7.html
The drive pins in the lever are positioned incorrectly and therefore stop the lever turn to the second position.
Thank for your help much appreciated.
It looks like I have the same problem as found earlier by these guys http://forums.corvetteforum.com/1579967350-post7.html
The drive pins in the lever are positioned incorrectly and therefore stop the lever turn to the second position.
Thank for your help much appreciated.
