Say I was wondering I'm back working on my 92 Z28 Camaro 5.7 TPI and the tachometer stopped working well the needle has been moving up and down while driving and today it stopped working and the speedometer has not worked sense I've gotten the car and I was wondering could the small plug in circuit board on the tach and speedo has gone bad.

 

 

 

Cool thanks for the info guys.

 

Well I when and checked the white wire on the coil they look ok I even checked the wire plugs to make sure they weren't lose on the coil and then cranked the car up and the tach is working now I think it still jumps a little but time will tell . Well thanks again for the info. Say W.E.G dose wc- autoparts have a speedo circuit board .

 

One thing that comes to mind is following that wire up the harness to make sure it’s not grounding out on something and/or open since you mention it flickers only sometimes.

 

Good point maks10 I will check it out. Thanks

 

WC Autoparts is Greg. He's on this board. Send him a message. Guy seems like he knows about all there is to know about third gen gauges.
Link to his user profile: https://www.thirdgen.org/forums/member.php?u=120121

 

Cool thanks W.E.G