I dont know why they bypassed it. But i took the fuse out and it is corroded badly. Scraped what i can off tested the fuse and its good. Retested the connector and it has 12.49 volts to all pins when i turn it from low then to medium then high and with out the resistor pack in the fan turned on. Turned the key off put the resistor pack in and the fan comes on with all settings.

 

I hear and seen pics of a xj being burned down from the heater side. What is the main things to keep a eye on. I know the blower motor over time the bushings and such go bad and causes resistance which causes heated wires and the heater resistor only thing i know is when its stuck in a single speed.

 

Add a ground to the blower motor.

 

That will be this weekend for sure cruiser54.

 

And always remember RCBRC

 

Ok never heard of that.

 

Refresh*Connections*Before*Replacing*Components

 

Thanks for all the help i really appreciate it. Been a long time working on a jeep.

 

White Hawk,

Check your other fuses. It might be best, considering the low cost of new fuses, to replace them all if they similarly are in such condition. If you have a standard transmission, the clutch master cylinder leaks and the brake fluid gets into the terminals on the inside of the firewall. This would be my concern. Don't shove anything in the brass terminals themselves that is thicker than the blade of a fuse to clean them- they are very delicate. If the corrosion is simply due to age, you can apply a very light coating of an electrical antioxidant compound:
As a Master Electrician, that one is my favorite, and I buy them from one of my suppliers locally. A 4oz bottle will last you forever unless you do what I do. But, if you buy it online, the larger bottle is probably cheaper depending on where you find it.

Good luck, and I am glad your heater works again. Sometimes, the satisfaction of fixing it yourself is worth the frustrations of finding the problem.

 

I'm getting more paranoid as time goes by. I have mounted a fire extinguisher within reach of the driver using a quick release pin in my vehicles. Might not have time to stop, jump out, go around back, fumble with the keys in panic, ......