Chevy Suburban Electrical issues

jakeeatmon

Have a 2002 suburban 5.3L. Everything works except odometer, windshield wipers, fuel gauge, ac/heater, and the battery light stays on. Battery and alternator are good, had them tested. All fuses to relating problems are good. OBII not reading any codes. Not sure what else to check or what another problem could be. Suggestions or solutions are highly appreciated. Thank you. 

Mr_Shiftright

Not much to do here except wild guessing. A pro scan tool to read data in freeze frame and real time might be the only way to track down what's going on--some kind of communication problem seems to me, since these components must all be networked to some module or modules.

Have you tried the ol' "jiggle test" by getting underneath the dash and moving the harnesses around a bit--to see if anything changes?

jakeeatmon

I have not done that. OBII turns on and reads, but just doesn't give me any information. Reads as if all is perfect on it. 

Mr_Shiftright

Well a code reader won't tell you much.