Temp and Tach guage quick working????

[87supraguy]

this morning did everything like normal, when out side turned the car on before leaving to warm it up. about 5-10 mins later i hop in and take off to work. on the way there (no spirited driving) the temp and tach guage just goes dead all of a sudden. cluster still lights up, oil press still works... WTF is going on?

any one have ideas what would cause both of the guages to die all randomly?

i have an extra cluster that i can quickly swap out but curious if anyone else has had a similar problem. i haven't had much time to trouble shoot since i was on my way to work and currently at work.


EDIT:

car details 89, 1jz, big single, 5 spd swap... ran perfectly since the swap was completed

 

[CyFi6]

Are those the only two things on the entire cluster not working? There's nothing really in common between the water temp and tachometer looking at the diagrams. First thing I would do is make sure all the connections behind the cluster are clipped in all the way and tight.

 

[jmcboost]

Well I know that on a lot of engine swaps in the MK3 the ground wiring on the cluster harness (M1 harness i think its by the ECU harness) never gets grounded when the swap gets done. Maybe check the wiring on the gauge cluster harness.

 

[87supraguy]

Are those the only two things on the entire cluster not working? There's nothing really in common between the water temp and tachometer looking at the diagrams. First thing I would do is make sure all the connections behind the cluster are clipped in all the way and tight.

Well I know that on a lot of engine swaps in the MK3 the ground wiring on the cluster harness (M1 harness i think its by the ECU harness) never gets grounded when the swap gets done. Maybe check the wiring on the gauge cluster harness.

so you guys are both right i knew its something small. haven't actually fixed yet as i haven't had time but as i turned it on yesterday after work to go home, the guages weren't working. after warming up a few minutes i hoped in and started driving and the guages all of a sudden came alive!!!

this morning the same thing happened while driving to work around the same spot the guages died. probably a bad ground somewhere. should be pretty easy to fix now. thanks guys