1977L48

so i did what 95% of websites said and replaced the circuit board behind my tach to get it working, the old one did have a black spot on it so i thought i would be good, i put everything back to gether as per required and still nothing, before the tach would stay at 1k and move up to 1500 under full power, now nothing, it just hangs out at 0. any other troubleshooting ideas would be greatful

lvmyvt76

did you check h the wiring coming off the dist. and also the tac filter by the dist.?

1977L48

yes, i tried bypassing the filter and still no joy

0Willcox Corvette

Where did you get the board? If it is the imported board you may have left out the three red washers...

If not.. then go to the connector on the board.. and check the terminals for power and ground.

Then test continuity from the signal connector to the distributor connector with the filter disconnected.

Does the tach do anything when you turn on the key?

There is tons of tach info on my sight and if you do a search here you'll find tons more.

Willcox

http://forums.corvetteforum.com/c3-t...eo-thread.html




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

http://willcoxcorvette.com/repairand...lp.php?hID=318
Corvette Left Hand Dash Pad Removal Made Easy 1968-1977

Corvette Tachometer Board Installation Instructions 1978-1982
http://willcoxcorvette.com/repairand...lp.php?hID=252

Corvette Tachometer Testing, Removal, Board Installation, Video Link 1978-1982
http://willcoxcorvette.com/repairand...lp.php?hID=290


1978-1982


1975-1977