So my dash suddenly is freaking out on me the speedo and tach jump all over an none of the other gauges work. All the lights work though but the check engine light will flash on and off periodically any ideas what it could be?
Not sure if Wranglers are the same, but I had a previous vehicle do the same thing with my speedo and tach and it ended up being that my battery was going bad. I guess that was a sign that I needed to replace it soon.
2004 Sahara TJ 3.73 Gears / 4.0L / 2" Pro Comp Lift / BF Goodrich AT 32x11.50R15 / 15x8 Pro Comp Alloy Series 1059 / 4' Firestik Ant / Midland CB Radio / Roll & Pitch Clinometer / KC & Hella 700FF Driving Lights / Winch / Smittybilt Bumpers (modified)/ Teraflex 9550 SS
Start with the easiest , cheapest remedy. Pull the dash cluster and clean the contacts and apply dielectric grease. Sometimes the erratic gauges are from poor/corroded contacts of the dash cluster. Try pushing on the dash to see if it resolves.
Clean the contacts on the connections as said above, and while you are back there make sure the grounds are properly connected to the body and are free from corrosion or rust. Last, make sure your battery terminal connections are also clean and attached well. Let us know how it goes and we can go from there. Best of luck