OK - I am not a Jeep owner, but yet a customer of mine is and he is having some issues with his Cherokee. He is getting a MIL (P1491 - Rad fan control relay circuit). I have gone though this website -
Which I got off these forums. Everything has been EXTREMLY Helpful, with 1 exception. I have made it though all the trouble shooting steps and got to this step:
Check for battery voltage at terminal 2 of the fan relay connector (Fig. 43). If battery voltage is not present replace the fan diode assembly.
There is no voltage at this terminal - I started to cheer! Then went to find the Fan Diode Assembly and about 2 hours later, and alot of web searchs I can not find anything that points me in the right direction. I did find a Diode like device right next to the fuse box under the hood on the passenger side of the vehicle. Just not sure if this is the correct one or if this is for something else. There is 3 wires going into this Diode like plug. So I am not sure if this is correct or not. So I am reaching out to see if anyone out here can help me out here.
Vehicle Information -
1999 Jeep Cherokee Sport
4.0L - AUTO
Look forward to the responses!