electric radiator fan


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Old 06-08-2019, 12:37 PM   #1
vernons
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Default electric radiator fan

i have been asking questions on the other forum. decided to ask on this one.
been reading allot.
on my 95 i cannot get my radiator fan to come on.
it works if i hook it to the battery.
is their a way to jump it through the power dis. center to see if it will come on?
it want come on with the defroster on and the ac has never worked.

also unplugged the temp. sensor on the t stat housing and got nothing
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Old 06-08-2019, 07:21 PM   #2
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The 2000 turns the fan on automatically. You could put it on a switch?
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Old 06-08-2019, 07:45 PM   #3
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Check out my write-up on a alternator relocation and a taurus fan install. I has links to install a toggle switch on the factory fan. good reading!
Alt relocation and Taurus fan install/
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Old 06-08-2019, 09:08 PM   #4
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thanks guys, but i always appreciate the advice. however for some strange reason i want to keep it as close to stock as possible when it comes to things like this. i want to dig around and see what is wrong and if i can find the problem.
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Old 06-09-2019, 07:53 AM   #5
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The link i posted defines the locations of the circuits for the fan and the wire colors in the PDC. You can check these for power and continuity. Also, The temp sensor at the t-stat housing is what the ECM uses to turn the fan on and off. The rear temp sensor is just for the gauge.

I lost my CD for 95 wiring diagrams, But I got a buddy looking for me another one. Anyhow, when I get it, I will post up the diagrams for the 95 fan wiring.
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Old 06-09-2019, 12:08 PM   #6
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Quote:
Originally Posted by Gluckmysock View Post
The link i posted defines the locations of the circuits for the fan and the wire colors in the PDC. You can check these for power and continuity. Also, The temp sensor at the t-stat housing is what the ECM uses to turn the fan on and off. The rear temp sensor is just for the gauge.

I lost my CD for 95 wiring diagrams, But I got a buddy looking for me another one. Anyhow, when I get it, I will post up the diagrams for the 95 fan wiring.
as always thanks for your time. i print off the diagrams so i can take them outside. it always hellps.

i dug around and found a broken wire. spliced it back together and it will run if i unplug he sensor in the t stat housing. this was a test i read about on another forum.

i the got to thinking about seeing if it was getting power from the power dist. center.

first no dice. i took a jumper wire with a fuse in between them. i never jump something without a fuse.

so i got to thinking. the way i understand a relay, the relay has to have power to activate a switch inside the relay. then once it makes a connection then poser will flow through the other terminal.

so i used my jumper wire with a fuse to connect power in the power dist. box.
then in made another fused jumper to connect the other two terminals. the fan came on.

i dont know a way to see if i have a signal to the power disp box to turn the fan on, but i do know that i am good from the power dist. box to the fan.

the fan will not come on with the defroster on. and the engine never reaches 200 when hot.

as as far as i know i am good. i have to at this point assume the fan will come on should it start to over heat. with no ac and all the water system new with the exception of a heater core, it runs very cool
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Old 06-10-2019, 07:39 PM   #7
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Here you go:




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Old 06-10-2019, 11:21 PM   #8
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Thanks buddy. What allot of people don’t realize is that their are allot more to the electrical system than the power distribution center and the fuse box under the dash.

Back in the winter the fan blower for the heater on my 99 Cherokee stopped working.
So I started checking things out. First the selector switch was about shot. Replaced that but still nothing. However I could hear a clicking sound behind the glove box.
Pulled that and I found a relay. It I twisted the relay the fan would work. So I pulled the relay and bent the little tabs a little Now it works as new.
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Old 06-11-2019, 02:27 AM   #9
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i am interested in finding the power control module that is located on the left side of the jeep. this is something that i have not noticed.
i did see a ballast relay on my old 93 that i parted out. did not see a power control module
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Old 06-11-2019, 03:44 AM   #10
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ask and yee shall receive


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Old 06-11-2019, 09:40 AM   #11
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Interesting thanks
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Old 06-11-2019, 02:22 PM   #12
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i was looking at your of the wiring diagram and matching it with my jeep. looks like this is the computer with the ac cycling switch sensor in on the top of the computer? i am guessing
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Old 06-15-2019, 06:37 PM   #13
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left fender side shield. i have been looking and all i see on the left fender side shield is the computer. this has me puzzled
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Old 06-15-2019, 07:29 PM   #14
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Quote:
Originally Posted by vernons View Post
left fender side shield. i have been looking and all i see on the left fender side shield is the computer. this has me puzzled
I think that is the only thing over there, PM me your email and I will send you the diagrams of all the connector locations. Its over 20 pages.
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Old 06-16-2019, 08:30 AM   #15
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Ok. Thanks.
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