nfratto

I have an 2003 C5 Coupe. I have full lights in all of the gauges and heads up display but recently the Tach will cycle on when the car is started (goes all the way up and then goes to 0). All other gauges are working perfectly. I check grounds and all plug assemblies under the hood no corrosion. Once and awhile the tach will seem to get a signal and move for a second or so then it just goes back to no reading. The heads up display is also reading 0. Any ideas?

nfratto

ttt

ASarsano

have u looked at you're ECU harness i'm pretty sure the Tac is run off the ECU

jd86L98

Did you ever fix this, I am having the same problem?

Poobahh

same

Any luck? Same issue here

feeder82

Here's a thread with the issue and fix
https://www.corvetteforum.com/forums...-pls-help.html