Thats strange, I've seen a couple of gauge panels that do that as part of the POST, none that I've ever owned and I don't remember what cars they were but I've never seen that on a jeep. I also know that on some models you can do the key trick, thinking about it there is a gauge test I remember reading about in either my 97TJ or 98XJ FSM, I think it's the 98 as it does not do the error code readout. I've always had a OBDII scanner so I've never tried it. Now you have me curious.
Yup, 98XJ FSM, section 8E-11 Instrument panel systems, actuator test, depress trip odometer button, turn to ON position but don't start, release button. There is a chart on the next page, seems it moves the gauges and instrument lights in 2 second increments. Spedometer from 0-120 then 120-0, gas from E-F then F-E.
well after searching around i found out that you hold the odometer reset button, turn the key to on and then release the reset button and it should start doing this thing. I found out that this is the test to check if all the gauges and all the lights are working.
flowmaster40,hpd30 with aussie locker,currie upper joints,4.88's, lca skids,chromo shafts,vanco brakes,d35 with super 35 and arb locker,re 4.5" springs,currie arms,re front uppers,Re shocks in back,walkerevens shocks up front, Re track bars with currie jj joints,anti rock,ss brake lines,re rear sway bar links,jks 1.25" bl and mml,bfg 35x12.5 km2's,craiger soft 8's,ome steering stabilizer,currie hd steering,rockmen front bumper,emp tank skid,lots more too.
lol yeah but i wasn't expecting Wranglers to be that advanced. After all ac in this thing is a very big luxury and if you find one with a premium stereo that reads more than 10-15 cds, you've got something special on your hands .