Tachometer question???
Thread Starter
Racer
Joined: Aug 2011
Posts: 455
Likes: 7
From: Lewes Delaware
Since the car is a 1979 removal is pretty easy and there are other diagnostic test you can perform before you send in the board.
First if you remove the tach / speedo lens cover from the tach / speedo housing and then remove the bezel. Once completed remove the three tach retaining screws... Here, go read this, it will walk you through the entire process.
1978-1982 Corvette Tachometer Testing, Removal, Board Installation
Once you have the tach out you should verify power and ground on the three tach clips.... Use another ground source to test the power terminal, then use the ground clip to test again. This will verify that you have power and ground at the tachometer. Once you have done this then test continuity from the signal clip to the connector that plugs in to the filter (or distributor if by-passed). This will verify the signal wire is good. You pass all three of these test then you do need a board.
Keep in mind a board is not a fix all and as the tach ages so do the internal analog movements so it is possible for you to purchase a board and not get fixed. If you send the tach in to us for the repair we can test the movement before we install a board and know if the issue is the board or movement.
Tach board installation:
1978-1979 Corvette Tach Board:
First if you remove the tach / speedo lens cover from the tach / speedo housing and then remove the bezel. Once completed remove the three tach retaining screws... Here, go read this, it will walk you through the entire process.
1978-1982 Corvette Tachometer Testing, Removal, Board Installation
Once you have the tach out you should verify power and ground on the three tach clips.... Use another ground source to test the power terminal, then use the ground clip to test again. This will verify that you have power and ground at the tachometer. Once you have done this then test continuity from the signal clip to the connector that plugs in to the filter (or distributor if by-passed). This will verify the signal wire is good. You pass all three of these test then you do need a board.
Keep in mind a board is not a fix all and as the tach ages so do the internal analog movements so it is possible for you to purchase a board and not get fixed. If you send the tach in to us for the repair we can test the movement before we install a board and know if the issue is the board or movement.
Tach board installation:
1978-1979 Corvette Tach Board:
Burning Brakes
Joined: Jul 2014
Posts: 831
Likes: 54
From: Arlington TX
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,850
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Also verify you have power and ground once the tach is removed.
Once you pass these test then yes... I'd send in the tach and board. The filter is sold separately.
If you do decide to send the tach to us, please email Sales@Willcoxcorvette.com for a Repair Auth. number.
Wilcox
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,850
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Willcox
