I Just bought this car and the speedometer don't work or the gas and the heat digital display are also not on? a wiring diagram would help but don't know where to look?

 

Do all the other gauges and lights work?

 

Yea all others do the tach works just not the speedometer

 

I would pull out the gauge clusters. I have a '96 and have done that before, it takes all of 30min. Check the plugs. The clusters are all connected via a single dash harness; however the harness has multiple plugs for everything.

Since you just bought the car, you cannot confirm what has been done. Honestly, I hope you carfaxed it. Cause that reeks of someone removing and swapping the clusters as a low-tech odometer rollback, then forgetting or not bothering to plug it all back in.

 

Slap the dash above the gauge cluster. If it jumps when you slap it its most likely a bad connection to the cluster. I would pull the plug and use a dab of dielectric grease and see if that doesn't help. I know it's hard beating on the car like that but it works

 

You first say the speedometer, gas, and temp gauge don't work now you say they work except for the speedometer. If that is the only gauge not working I'd check your VSS and the gauge itself.

 

My bad man but yea the gas and the heat display don't light up and the speedometer just stays down no matter the throttle position

 

Found the problem