75 corvette tach
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,852
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
There is a ton of tach info on my sight and if you do a search here you'll find tons more.
For you.. I would:
A) By-pass the filter and see if the tach works. If it works replace the filter.
B) Test continuity from the tach connector to the tach inside the car. From A to B.
C) Verify you have power and ground to the tach by checking the terminals.
D) If you have power, ground and continuity then you're probably going to need a tach board.
If you decide to remove the tach take a hard look at removing the lh dash pad made easy... it will walk you through the process.
http://willcoxcorvette.com/repairand...lp.php?hID=318
Corvette Left Hand Dash Pad Removal Made Easy 1968-1977
Willcox
http://willcoxcorvette.com/repairand...lp.php?hID=290
Corvette Tachometer Testing, Removal, Board Installation, Video Link 1975-1982
http://willcoxcorvette.com/repairand...lp.php?hID=314
Corvette Tach Filter Installation Instruction Sheet Revised 3-11
1975-1977
For you.. I would:
A) By-pass the filter and see if the tach works. If it works replace the filter.
B) Test continuity from the tach connector to the tach inside the car. From A to B.
C) Verify you have power and ground to the tach by checking the terminals.
D) If you have power, ground and continuity then you're probably going to need a tach board.
If you decide to remove the tach take a hard look at removing the lh dash pad made easy... it will walk you through the process.
http://willcoxcorvette.com/repairand...lp.php?hID=318
Corvette Left Hand Dash Pad Removal Made Easy 1968-1977
Willcox
http://willcoxcorvette.com/repairand...lp.php?hID=290
Corvette Tachometer Testing, Removal, Board Installation, Video Link 1975-1982
http://willcoxcorvette.com/repairand...lp.php?hID=314
Corvette Tach Filter Installation Instruction Sheet Revised 3-11
1975-1977
Last edited by Willcox Corvette; Dec 1, 2013 at 05:58 PM.
