Tach died

[bertha66]

The tach on my 93 ATX is not working, knowing that the tach reads from the cam sensor; I changed it out, but the tach is still not working. Also the overdrive button is not working and the clock reset. All of this happened at the same time. What ties all these things together?

 

[tompumped]

My tach recently died. At first it was only reading after 2500 rpms.

FYI you can just pull the tach out of the cluster to replace it, but it sounds like you blew a fuse. Check the fuses and go from there.

 

[bertha66]

Thanks, but I did check all the fuses, under the hood and the dash.

 

[rubydist]

if you already changed the cam sensor, and already checked the fuses, then you have at least one wiring issue. I think you have more than one though.

I would pull out the gauge cluster, probe the tach drive wiring to see if there is continuity.

I would pull the handle off the shifter lever to see if the o/d button wiring has come loose or gotten pinched off (the most common o/d failure).

I would probe the continuous power to the clock to see if you have a bad wire or connector there.

 

[bertha66]

I pulled the console and fond a broken wire under the sifter and repaired it. OD button worked for a couple days before this problem came up. I did go back and check that repair; it was still good. Have have no more problems with the clock, just the OD button and the tach.
Read a old post that talked about the VSS causing the OD not to work, something I should be looking into?

 

[AREA 91]

The last tach issue I diagnosed, was a broken wire. It was a few inches from the cam sensor plug, where the wiring harness does a hard bend.

 

[bertha66]

The last tach issue I diagnosed, was a broken wire. It was a few inches from the cam sensor plug, where the wiring harness does a hard bend.

I will look at that, thanks