I noticed off and on on WUD that my fan on light some times stayed on when the fan actually turned off. Sometimes it would say its on and not turn on. The other day I finally got to drive car to due some tuning. Now the fan always came on when up to temp. After driving the fan now will only turn on with the AC switch. I checked the relays and fuses and they are fine. The sensor in the side of the head is only a couple months old but not ruling that out. I know the EBL is set to disable the fan @ 40mph. Could I have a glitch in my EBL as it disabled my fan and now won't turn it back on. Not saying it does have a glitch just would like opinions before I look at it more and if any one has had a similar issue like this.

I won't get to look at it till sometime this weekend maybe. But if the sensor in the side of head is not working. I believe there is a way to make EBL turn on fan at a certain temp where exactly do I find this if it can be done.

 

With the stock f-body L03 the fan is not ECM controlled. To control it via the EBL Flash ECM need to run a wire from ECM pin C2 to the same wire that is on the head temperature switch.

RBob.

 

Okay, this confirms that it is either the temp sensor in the head or the wire going to it. Kinda hope its not the sensor as its fairly new. If so that don't say much for Hypertech.