c17loadmaster

Ok, so I have 54,000 miles on my heavily modified JK. It is a 2009 JKU. Just today (as in NEVER before) when I locked my jeep the overheat light above the temp gauge began blinking and wont stop. The JK wasn't overheating, and I only just drove it 15 miles. When I unlock it, it stops blinking. When I turn it on, the temp gauge reads a normal temperature. I checked the oil, and trans fluid and they are fine. Also the coolant is at a normal level. I service all fluids regularly. I have an aftermarket KARR alarm, that has a separate system and separate blinking light. This overheat light has never come on before now. I really have no clue what the hell is going on. Please help!

JK-Ford

You may have a stuck thermostat?

c17loadmaster

Apparently it is the security light. The computer is not throwing any codes. Guess after 54k miles it finally started to work. So either it didn't work for 2 years or my system is going to crap the bed. Weird that it never came on until now. Oh well.

JKlad

You may need to be careful, as if it flashes & then stays on the system can disable the ignition & stop the Jeep from starting. Happened to a forum member here a while back; light began blinking & was doing so for a couple of days & he thought nothing of it, but then one evening it remained lit & his Jeep refused to start. From memory he disconnected the battery for 15 mins & it seemed to do the trick.

SiliconTi

x2

Disconnect the battery for a bit to reset the computer.

c17loadmaster

Thanks for the info guys. I will disconnect the battery today for a solid 30 mins and see if it comes back.

JKlad

So how did things turn out in the end; problem solved?