'70 Vette wipers not working
Thread Starter
Melting Slicks
Joined: Oct 2012
Posts: 2,156
Likes: 273
From: Dunedin NZ.
'70 Vette wipers not working
Hi, up until recently the wipers were working fine but no longer. I have tested a number of things, the wiper motor is working fine when I jumped power to it with another battery. The vacuum system is okay and the wiper door opens correctly allowing the safety limit switch to close but at this limit switch I'm only getting about 5 Volts, tracing back to the under dash override switch there is only about 5 Volts as well. My question is where does this switch get fed from? Is there a common connection on the light switch? The headlights are working fine as are all the other controls.
Le Mans Master
Joined: May 2003
Posts: 8,877
Likes: 3,556
From: Fernandina Beach FL
2023 Restomod of the Year finalist
2020 C3 of the Year Winner - Modified
It is crimped in the harness-inside the passenger cabin near the headlight switch.
Been awhile since I took a harness apart- so i don't have any pics
Been awhile since I took a harness apart- so i don't have any pics
Team Owner
Joined: Jun 2001
Posts: 23,376
Likes: 1,067
From: Virginia USA
If 71 is the same as 72 there is a relay under the center console. It' been a while since I looked at the circuit so I can't remember what it does. I'll look when I get home from work unless someone else chimes in.
Thread Starter
Melting Slicks
Joined: Oct 2012
Posts: 2,156
Likes: 273
From: Dunedin NZ.
Thanks, I was hoping it might be somewhere easy to get to but no such luck, so drop the steering column and pull the dash panel back and dive in
FWIW I had to do this back in March so I could lube the speedometer cable so maybe something in the wiring was disturbed? They were definitely working after that though
FWIW I had to do this back in March so I could lube the speedometer cable so maybe something in the wiring was disturbed? They were definitely working after that though
Last edited by Haggisbash; Aug 8, 2025 at 03:20 PM.
Thread Starter
Melting Slicks
Joined: Oct 2012
Posts: 2,156
Likes: 273
From: Dunedin NZ.
Hi,I think that relay is switching the grounds on the wiper motor and is controlled by the wiper switch so I'm thinking its unlikely to be the cause of my problem but Its still on the list.
Thread Starter
Melting Slicks
Joined: Oct 2012
Posts: 2,156
Likes: 273
From: Dunedin NZ.
Le Mans Master
Joined: May 2003
Posts: 8,877
Likes: 3,556
From: Fernandina Beach FL
2023 Restomod of the Year finalist
2020 C3 of the Year Winner - Modified
Well - found the pics- this is how GM did it back in the day!
Thread Starter
Melting Slicks
Joined: Oct 2012
Posts: 2,156
Likes: 273
From: Dunedin NZ.
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