Quick note on the fuel gauge, it's most likely the sending unit and you do not have to drop the tank. If you look at the tank from behind your right rear tire you'll see the sending unit. Real easy to break off some of the retaining screws if rust is involved. I bought my Trooper after it had sat for a long time (blown engine) and the sending unit was rusted in one position.
I'll add if you do pull the sending unit take that opportunity to look in the tank. Mine didn't leak but the entire inside of it was fuzzy rust.
I'll have to look a bit but know I checked the gauge by either grounding a wire at the sending unit connector or applying power to it, right now don't remember but a simple check without disassembling anything. My gauge sat at empty, applying power (I think) made the gauge go to full so that eliminated the gauge as the problem.
I know one wire is low fuel light, one is gauge.
I'll add if you do pull the sending unit take that opportunity to look in the tank. Mine didn't leak but the entire inside of it was fuzzy rust.
I'll have to look a bit but know I checked the gauge by either grounding a wire at the sending unit connector or applying power to it, right now don't remember but a simple check without disassembling anything. My gauge sat at empty, applying power (I think) made the gauge go to full so that eliminated the gauge as the problem.
I know one wire is low fuel light, one is gauge.