Temp gauge sensor for the gauge is on the drivers side cylinder head rear. Single purple wire. Ground the wire out the gauge pegs high. Fuel gauges are sent a signal from inside the tank from the sending unit. They read 0-95 ohms IIRC. If the gauge is reading hitgh all the time yes it could be a bad sending unit input. Requires tank removal to replace or repair. Or just cut an access hole in the tub over the tank to gain regular access to the pump and sending unit.
Welcome to the forum!!! I just noticed so edited.
89YJ 2.5L TBI, AX-5, NP231 SYE, Ford 8.8, Yukon Grizzly, Tom Woods Shaft, 33" BFG T/As, 4" lift, Warn VR10000s.
AF Jeep Club Tail #184
Last edited by jokerchief462; 03-28-2013 at 12:43 PM..
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