83 radiator fan...one more question.

[Del Gue]

I've posted about this a couple of times in the past few months, and am still trying to get my radiator fan to work. I jumped the radiator fan and it works just fine. I replaced the thermoswitch with a brand new one.

 

HERE'S THE NEW CLUE: I checked the fuse and it was blown, so I replaced it with a new 20a. A couple of days later with the fan still not working, I decided to check the fuse again, and it had blown too.

 

Here's the question: Could the new thermoswitch be the wrong one, causing the fuse to blow, or what could be the cause? I'm not good at all on electrical stuff.

 

Thanks for all the help.

[hatchsub]

A fuse will blow if there is a short in the circuit somewhere. Your thermoswitch is fine. What i would do is start tracing the wire from the thermoswitch and the fan and see if any of it is frayed or touching metal (ie the car body) where it is not supposed to be touching.

[daeron]

do you have a multimeter?

 

If so, unplug the fuse, and check for continuity between the fan side of the fuse plug, and chassis ground. Something tells me your going to find some continuity there.

 

If you DO find continuity, then run under the hood, and unplug the fan. Not the thermoswitch, the thermoswitch only deals with grounding the fan. Once the fan is unplugged, go back to the fuse panel and check for continuity between the fan side of the fuse plug and ground again. If you get infinite resistance, replace the fan; if you still have continuity then somewhere between the fuse box and the fan plug, the hot wire for the fan is frayed and shorting out somewhere.