6 cyl gauge cluster to 4 cyl MJ

[Suuperman]

My 4 bngr MJ has the dummy light gauges pod.

 

I got a full cluster from the junkyard yesterday but from a 6 cyl jeep.

 

I have swapped from 6 cyl to 6 cyl with no trouble in the past.

 

What will I need to do to make the gauges work on the 4 cyl MJ? I know it's a 'bolt' in procedure but ovbiously the senders are different as is the 4 cyl vs 6 cyl wiring harness.

 

:D

[Eagle]

If the new cluster is from an '88, '89 or '90, there is a small potentiometer next to the tach on the cluster. Looks like a little plastic car with a '+' in it. The '+' is for a Phillips screwdriver. Use that to calibrate the tach. You probably should have a known-good idle tach to verify the calibration.