2008 Jeep Grand Cherokee Limited. Last night while I was waiting to make a left turn, my car's dash went haywire, all these lights went on, all the "warnings" were cycling through, the turn signal arrow was stuck on (turn signals stopped working), the radio completely went black, the seat warmers shut off, and the speedometer and tachometer and temp gauge stopped working and went to 0.
It stayed this way for the rest of the drive and I was able to go home.
Turned the car off, turned it back on, issue persisted. Couldn't use the key fob to lock the car - it was totally unresponsive.
Turned it off again and got out of the car and watched it for awhile, and the dash illumination stayed on with just the gauges backlit and the one turn signal arrow still on.
Left it overnight and all the panels did shut off. Started the car this morning, all seems back to normal except the check engine light is on.
I took it to the dealer this morning and they want $120 to diagnose it. I decided not to do it today as I have a lot of appointments and if the car's working I need to drive it.
Does anyone have any idea? Did the module freeze? Is this a one off or will this keep happening and should I definitely get it looked at?
Also, I obviously need to get the codes read for the check engine light, but can I just take this to a private place for less $$$?
Not a car tech wizard so any advice would be appreciated
Also, I did replace the battery about 2 months ago by AAA because the old battery left me dead one day. Hadn't had any problems since then though.