1977 Vette Tach Issues...
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8th Gear
Joined: Jun 2009
Posts: 8
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1977 Vette Tach Issues...
Hello I am new to the forum... My uncle owns a 77 vette and the tach started to run backwards??? Then it quit... Any Ideas? I dont know much about vettes I have never been able to buy one.. I wish I could afford one to restore with my son I believe the corvette is truly an american Icon.... Sorry to ramble ant Ideas on the tach?
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,851
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
It sounds to me like the tach board is bad and will need to be replaced.
The tach only has three wires running to it, a power, ground and signal wire.
With power and ground hooked up and no signal wire the tach would go to zero. Basically you can create this by just turning the key to the on position and not starting the car.
For the tach to run backwards there is good chance the board is shorted out.
Here is how you change the board! This is for a 78-82 but it is almost the same install except you do not have to transfer the studs from the old board! A real Pain in the rear to get out of the car, easy to install the board!
http://www.youtube.com/watch?v=1yc16CgTekA
If he needs to board, here is the link: http://willcoxcorvette.com/product_i...ducts_id=25779
If he needs help getting the dash out of the car there are instructions for this listed here: http://willcoxcorvette.com/repairand...lp.php?hID=105
Willcox Inc.
The tach only has three wires running to it, a power, ground and signal wire.
With power and ground hooked up and no signal wire the tach would go to zero. Basically you can create this by just turning the key to the on position and not starting the car.
For the tach to run backwards there is good chance the board is shorted out.
Here is how you change the board! This is for a 78-82 but it is almost the same install except you do not have to transfer the studs from the old board! A real Pain in the rear to get out of the car, easy to install the board!
http://www.youtube.com/watch?v=1yc16CgTekA
If he needs to board, here is the link: http://willcoxcorvette.com/product_i...ducts_id=25779
If he needs help getting the dash out of the car there are instructions for this listed here: http://willcoxcorvette.com/repairand...lp.php?hID=105
Willcox Inc.
Last edited by Willcox Corvette; Jun 3, 2009 at 09:14 PM.
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,851
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
If you need help, you can always email me direct at WillcoxCustomerService@Willcoxcorvette.c om.
Willcox Inc.
Willcox Inc.
