tach cluster problems

[1chrisapple]

So i put a tqch cluster in my car 89 festy L and had to add the yellow green tach wire.tach and speed and all work great except my temp gauge dont seem to run as high and my gas gauge only goes to just above half when full of fuel so anybody have ideas

[TominMO]

Different temp gauges seem to have a personality of their own. If the temp and gas gauges in your old cluster worked fine, I'd take the clear front off the tach cluster and just move the needles a little off from the far left when the ignition is off. See if that then gives you readings more like the old ones.

[1chrisapple]

Thats what i was thinking to do as really thats the only option.just needed lil confidence booster lol hahah thnx tom

[worfdog]

That's the way I set mine several years ago. Filled the tank up, Let the car warm up to normal operating temp and moved the needles on the gauges where they needed to be.

[1chrisapple]

Awesome guys thnx

[needragr]

So i put a tqch cluster in my car 89 festy L and had to add the yellow green tach wire.tach and speed and all work great except my temp gauge dont seem to run as high and my gas gauge only goes to just above half when full of fuel so anybody have ideas

I just pulled the cluster out of my 89L. It was updated by the PO to a tach unit.
The reason I pulled it was it had a seriously screwed speedo and no gas gauge operation (always empty)
What I found was a pair of wires jumperd to screws on the circuit board that routed thru the firewall to the coil. ??
I pulled the R. seat & tested my sender ...good
tested continuity to the connector under the dash...good
So Im replacing the cable which I think will solve my bouncy speedo, but how do I proceed with the gas gauge?
does it also have to be externally wired?
So what is the wire loom differance between the L & LX?

[navdoc101]

Have you tried just cleaning all the pins .
I used a piece of sandpaper & cleaned all the pins re-installed the cluster, & gas gauge worked.
It had not worked for a year, no problems not.
KISS

[needragr]

Yes. first thing done was inspect & maintain (including cleaning all the contacts then testing and replacing bulbs)
What else have you got?

[F3BZ]

did you clean the termination point of the black ground wire off the tank sending unit? there's no difference in the fuel sending diagrams between 89 L or LX. both have yellow wire to gauge and black to ground.

[needragr]

Your right ...to a point.
the wire loom for the body including the tank sending wire(s) are the same, until they connect to the loom section under the dash.
Against conventional wisdom apparently the L & LX DO have a different loom section running behind the dash connecting things like HVAC ctrls, cluster, R window ctrls, AC, pwr mirrors ect.
Perhaps not all, but mine.
The 1st indication that something was amiss was when I went to plug in the pwr mirrors only to find there were no connectors.
Now Im faced with swapping a LX dash loom (which looks to be a MAJOR PITA) or independently wiring all the options not installed on my car.

I just want important indicators like my gas gauge & speedo to WORK!