Tach Broke! Options

[turbohcar]

Here's the full story. Way back when, I decided to get a set of white face overlays for my gauge cluster to match the Phantom Autometers on the A-pillar. The white faces didn't work and I actually messed up my needles doing it and eventually the whole thing quit working. Pulled the car in today, replaced the cluster with a good used one from KOU and still no worky work. Pulled fuse, it was burnt, swapped out with a good one and everything BUT the tach works. The speedo, oil press, fuel, temp, and factory boost gauges all work except for the tach. What's the deal? I checked the vfaqs to no success. Can anyone help me?

[KOU In3]

I know Wort's had a tach in the past that was a hodgepodge 90/92 cluster. The 90 tach had been swapped into the '92 cluser of vice versa.

Anyways, if something along those lines had been done to your old tach, it would help explain.

Will the tach from your old cluster function if that cluster is swapped back in?

Other option is that there is a wiring short that blew the old fuse and is still in place.

[turbohcar]

Well, I haven't tried putting the old one in as of yet. I hadn't thought of that just yet. In any case, I still needed a new one because my needles aren't in the right place after I took them off anyway. Since the new fuse has been put in I'll try that when I get home and post the results here. Thanks Travis.

[KOU In3]

I understand that you'd need a new one anyways. But it would help rule out whether the problem went with the gauge cluster you picked up here, the car's cluster, or the wiring within the car.

I'd hate to see you spending time tracking down a phantom problem that was caused by a faulty used cluster from here if that was the case is all.

[turbohcar]

I was thinking much the same thing after I read your post. I hate all this wiring crap. I'm no electrical engineer and at times I wish I was.

[ICGerms]

I didn't think that a '90 cluster would work in a '91-'94 car because of the noise filter deal that the '90s have.

[turbohcar]

It's starting to look like that's the case. The tach on the old cluster works fine, so it must be a problem with just the new tach. Give me a call if you get a chance Travis and we can talk about it. Thanks all.

[turbohcar]

Took apart the old cluster and underneath the overlays was a 0, 10, 20, 30 mph speedo (91+ cluster) which is the same as the one you sold me. SO, what it must be is a 90 cluster with a 91+ speedo overlay in it or, a 91+ cluster with a 90 tachometer instrument in it. Either way, I've got the wrong tach.

[turbohcar]

I talked with Travis and he pulled an old cluster out for me to try. Plugged it in last night and everything works! Thanks KOU Motorsports.