I've got a problem when I connect the battery back up after performing a repair the rpm gauge doesn't work and the speedometer just jiggles up and down on zero. I had originally turned the key ignition to "on" position but not start for 4 minutes to reprogram sunroof,windows,a/c...ect. I then turned the key to the off position and then started it up and that's when I realized the speedo & rpm gauges where not working. So I shut the car off and turn the ignition back to "on" and waited 4 min. again, and this time with out turning key off I turned key to start and the engine started up and rpm gauge started up and speedometer was steady(not jiggling). So today I start it up and no rpm's and speedo just sits on zero jiggling again. I performed a 4 min. key in "on" position and then to start but it didn't fix it

I have a 98' Cadillac catera but its actually a Opel Omega, can someone help me figure out the source of this problem

It does it just about every time the battery gets disconnected for a good period of time, but it eventually starts back to working again sometimes not until you drive it around for a few days. I thinking maybe its time to figure it out before it completely stops working