Brenooch

Hey everyone,

did a quick search of the forum and didn't quite find anything for my specific situation...

I went to the scrap yard today and grabbed an intrument cluster with a tachometer to install on my truck. It just doesn't feel right driving without one... I like to know what's going on under the hood.

I have a 1992 F-150 XLT Flareside with a 5.0 V8, E4OD tranny. I made sure to grab a cluster from a truck with an identical setup. Installation went smoothly and everything on the new cluster works perfectly, but the tachometer is acting funny. When I turn the truck on the tachometer shoots up and sticks to 3,000 rpms - clearly that is not what the engine is doing. When revving the engine the guage isn't sensitive at all, it takes a real hard rev for the guage to move. It's working... but not correctly.

Any thoughts on what might be the problem? Where should I start to look? I'm wondering if I should just go back to the scrap yard and grab just the tachometer portion of another truck and try plugging that in, since I now have the correct cluster. Could it be something deeper in the electrical system? Any suggestions will be much appreciated! Thanks in advance guys.

1987 F-150 XLT 4x4

If all of the other gauges are working except the tachometer,
it seems as if the tachometer didn't work when you bought it.
Its a Plug-n-Play, nothing special to do, but plug it in.

You could replace just the tachometer if you like the mileage on the cluster you bought at the junk yard or take it back and swap it from another 92 F-Series truck as long as it wasn't a diesel.

The F150, F250 and F350 are the same clusters as long as it is a gas engine.

A manual transmission has a "Blank" installed where the gear shift indicator should be and a C6 transmission has only 3 gears there, it doesn't matter about the transmission.
The gear shift indicator can carefully be swapped out with your 4-speed shift indicator.

Hope this helps!

redlightning93

You have a bad Tachometer. Just make sure you get one from a '92 or '93 model truck.

1987 F-150 XLT 4x4

I just noticed you have a 92.

Yeah, like redlightning93 said; 92-93 F-Series.


Hey redlightning93;
Is that just 92 & 93 only ? or will all 92-96 F-Series clusters fit ?

redlightning93

'92 & '93 are same, '94 & '95 are same. '96 is different again.

mustangGT90210

Your tach is bad. Mine old one stuck at 3400 as long as power was going through the cluster, and would start to move as the truck crested an actual 2000rpm. Just go get another from the junkyard, that's how I did mine, and it's great to have a working one! Real easy on my truck, I'd imagine it is on yours too. Just take off a few trim piece, then the lens to the cluster, pop out the old tachometer and pop in the new one.

Just call me Sean

iTrader: (1)

That is good to know.

Brenooch

Thanks for all of the help guys! I went back to the scrap yard today and grabbed a tach from a '93 - it works! Turns out it was just the tach itself (as everyone has said) and not anything to do with any wiring. Beauty.

mustangGT90210

I thought my whole cluster was completely boned until I found out the gauges just plugged in.


Also, glad you got one at the yard, brand new out of LMC them things are about $200

redlightning93

Thanks for letting us know how it worked out.