I have a 1988 Jeep Comanche Sportruck and all of the gas, speed, etc gauges are not working. The lights that lit up the gauges used to work before I recharged my battery, since the jeep was left sitting for a couple months. But ever since I had the truck none of the speed, gas, and all the rest of the gauges have been reading/ working anything at all. What could the problem be and how could I fix this myself before having to go to a repair shop? Thank you for your help I've had this problem for so long and it's just time for me to fix this.
Check fuses, if not a fuse, replace the dashboard gauge circuit board. DISCUSSION: Check the simplest and cheapest things first (fuses). If it is not a fuse problem, the easiest (and possibly the cheapest) step is to replace the dashboard gauges with parts from a junk yard. You might have blown the voltage regulator on the dash board (not the voltage regulator associated with the alternator). The difficulty of getting out the old dashboard gauges, and replacing a single component is slightly more than the difficulty of getting out the old dashboard gauges and replacing the who dashboard gauge circuit board, gauges and all. You might have also blown some gauges, so even if you fix one component, you might have to go back in to fix more. It is better to recharge the battery when it is disconnected from the car (to avoid the possibility of blowing out sensitive electronics such as dash boards).
