gauge problem

[Gavin]

Hey all having problems with temp and fuel gauge, on getting the car rev counter wad sticking but everything else worked took the cluster apart to check for broken solder resistors etc nothing untoward found. Put the lot back together rev counter working again fine looks like a screw wasn't tight enough from prev owner taking the cluster apart but now temp gauge always reads max so does fuel gauge when ignition is turned on checked all fuses non have blown also traced the wires back on the printed membrane nothing broken or loose there.

Bit stumped on this the 3 screws behind each of these gauges are tight been told these pass power only so don't need adjustment they where working prev to this.