Electric fan test?

[ajpthng]

My electric fan on the WJ quit working this weekend, is there a way I can bypass the temp sensor or what ever is on it to see if the fan still works? I think it's the relay but I want to try and trouble shoot this as much as I can before I start spending money to replace parts. I checked the fuse and that is good.

It isn't that big of a deal at the moment because its cold enough to keep the engine at operating temp while driving down the road and can sit for about 10 min before the temp gets too high for my taste. I would like to resolve this before the end of the month so if anyone has any info or can help me trouble shoot this that would be awesome!

Thanks in advance,
Tom

[ARCTIC_EXPRESS]

Stick your tounge on the connector and see if it works



My electric fan on the WJ quit working this weekend, is there a way I can bypass the temp sensor or what ever is on it to see if the fan still works? I think it's the relay but I want to try and trouble shoot this as much as I can before I start spending money to replace parts. I checked the fuse and that is good.

It isn't that big of a deal at the moment because its cold enough to keep the engine at operating temp while driving down the road and can sit for about 10 min before the temp gets too high for my taste. I would like to resolve this before the end of the month so if anyone has any info or can help me trouble shoot this that would be awesome!

Thanks in advance,
Tom

[akdsmer]

I typed up a full page on this and it got lost? 1st. Check the 40A fuse (Fuse 10 in the pwer distribution center)

You can use a scan tool to force the fans on. That would eliminate fan, wiring and relay issues. That only takes a moment.

Otherwise, you can jumper the ASD relay to keep the Fan relays powered, check for power with a testlight on pin #30. If you have power continue forward, if you don't you are going back between the ASD relay, the fuse and the fan relays (high and low).

Jumper each fan relay (from pin #30 to pin #87) If each fan comes on, then you have a control side issue.

If the fans don't spin, leave either relay jumpered and use your test light at the fan connector. The Yellow wire is the high speed and the Dk Green wire is the low speed. The White/Black is the ground. Either check for continuity at thru each wire to ground or use a test light and check for power when each relay is jumpered through the appropriate wire. If the light illuminates brightly, then the motor is bad. If it doesn't check for a bad ground (test light connected from battery positive to ground pin of the connector).

It's a pretty quick test with a power probe, scan tool and wiring diagram. Perhaps you should swing up to my place to "do a little bronco work" while I check it out for you? :)

[ajpthng]

I might have to stop by and have you look at it. I was hoping for a "take the blue wire and put it on the positive terminal and the black wire and put it on the negitive terminal" :D

[akdsmer]

The wiring diagram (along with a overhaul procedure and specs for a 241C) are sitting on my desk. Operators are standing by...

[justimpact]

hey tom if you need some parts I may have some that will work off of the zj that I am using for the project rubicant call 378-3199 or just P.M.me