Tach question, 1981
Thread Starter
Racer
Joined: Oct 2007
Posts: 270
Likes: 0
From: Chapel Hill NC
Tach question, 1981
Many thanks in advance! 
My tach has just stopped responding. Does not do anything... just dead.
(What info do we need to know, like the distributer type, or the engine was rebuilt, etc.?)
So my question is: What is the first logical steps to troubleshooting this issue?
I have searched the forums... but would like a clean, plain and simple approach.
"So, your tach stopped working? OK.. the first thing(s) you need to check is..."
My tach has just stopped responding. Does not do anything... just dead.
(What info do we need to know, like the distributer type, or the engine was rebuilt, etc.?)
So my question is: What is the first logical steps to troubleshooting this issue?
I have searched the forums... but would like a clean, plain and simple approach.
"So, your tach stopped working? OK.. the first thing(s) you need to check is..."
Race Director
Joined: Oct 2000
Posts: 11,891
Likes: 3
From: Kansas City, MO ...I'd like to go fishing and catch a fishstick. That'd be convenient. - Mitch Hedberg
Safety Car
Joined: Jun 2004
Posts: 4,354
Likes: 214
From: Beecher Illinois
At the rear of the intake manifold there is a tach "filter". Silver capaciter looking thing with wires going to the distributer. You can unplug the wires from this and bypass it. See if that makes any difference. If not, probably the tach board mounted to the back of the tach itself.
All the vendors sell these. Installation is easy on 78-82s.
In the main gauge cluster you will see 3 pairs of screws at the top. Remove the 3 screws that hold just the clear lens and the 2 on the sides for the lens. Remove the lens. Remove the 6 allen screws holding the bezel(these are real, unlike the cosmetic ones elsewhere).
3 screws hold the tach face in place, remove them and carefully pull the tach out. Replace the board on the back making sure the insulaters are placed correctly.
All the vendors sell these. Installation is easy on 78-82s.
In the main gauge cluster you will see 3 pairs of screws at the top. Remove the 3 screws that hold just the clear lens and the 2 on the sides for the lens. Remove the lens. Remove the 6 allen screws holding the bezel(these are real, unlike the cosmetic ones elsewhere).
3 screws hold the tach face in place, remove them and carefully pull the tach out. Replace the board on the back making sure the insulaters are placed correctly.
