So my 2012 jeep jk dash has been giving me problems lately. I will start off by explaining what is going on and then what I have done to the jeep electrically since I have owned it. I will be driving down the road when all of a sudden my speedometer will die and then return to normal. At the same time my E brake light will turn on as well as my ABS light and traction control light. Sometimes my head unit will also turn off and on but that is usually rare. It is very intermittent that it does this and is usually occurs during a rain storm or high humidity but not always. Now on to what I have done with the electrical system. I have not done anything really recently that could cause this to occur so I don't know if what I have done to my jeep could cause any of this. I use a fuse tap on one of the fuses for my off-road lights but I use a fuse slot that is not in use and had no fuse in it. I also have a winch and replaced the factory head unit with another factory head unit. The only recent thing that I did was reprogrammed my speedometer for my 35" tires using the AEV procal. Could this have caused the issues that I am having? Any thoughts?

 

Have you checked for codes with a code reader, (not the self read feature)?


Look in your ProCal instructions under the tire size paragraph. It talks about strange behavior after re-programming the tire size.

Also look for any loose grounds and battery connections.

 

Check your ground on the battery. There is a few posts on this and people have change a lot of parts for this problem just to find out it was a loose ground on the battery.

We had the same problem and I moved all my accessories connected to the battery to an empty bolt on the battery and no more problems after that.

 

Read through this thread.

https://www.jk-forum.com/forums/modi...havior-274648/

 

Thanks guys for all the great info!

 

It was the battery terminals, thanks for all the help everyone!