I went out and purchased my first tj a little over a month ago and the oil pressure gauge just started to act up. I put a new sending unit and harness in it and the oil pressure gauge still doesnt work. It will read 40 psi then just randomly drop to 0. I know I have oil pressure because I hooked up a mechanical gauge to check it. So is there a way to disable the beeping and the check gauges light if I disconnect it and put an aftermarket gauge? also is there something that would typically cause this issue?