Radiator fan connection plug - JeepForum.com
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post #1 of 6 Old 09-18-2020, 11:21 AM Thread Starter
Banditware
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Radiator fan connection plug

My radiator fan stopped working. Fan still works. Took it out and tested. Also tested PWM connections. Everything is fine there. It is the plug tho, it fried as in burnt.

Can i just cut the plug out of the picture and just splice together? Probably solved?!
Or I can do that and just add a manual switch if this problem solved is actually not solved lol

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post #2 of 6 Old 09-18-2020, 12:55 PM
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the manual switch will likely cause codes and the PCM may have 'action taken' settings, ie AC may not work etc.

This is a 4.0L what year WJ?
IIRC wells automotive elec connector 1P1493 check with local NAPA.

What is the issue?
FYI there are codes for fan relay/module circuit issues.
Also fan does not come on till @220Deg F.

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #3 of 6 Old 09-19-2020, 06:58 PM
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look at the size of the wires going into the fan motor, then look at the size of the pins in the connector. i personally feel the design is flawed. a motor that can pull high amps, small connector plugs, a relay located in a spot where it can overheat, etc. i'm soldering up a new harness with ring terminals, terminal block, and dedicated ground to the relay, fan motor and battery ground, to see if it can be made reliable. i like electric fans, but this design seems more like an afterthought, than something that was engineered from page one.

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post #4 of 6 Old 09-19-2020, 08:41 PM
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Just keep in mind that 12v DC voltage does not require the same size wire gauge as AC voltage. 3' of #16 ga wire will handle 50 amps. That's not very big wire.
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post #5 of 6 Old 09-20-2020, 11:56 AM
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those numbers dont match the guides for 12v wires i've seen. 6 gauge wire is the 50 amp choice for less than 20 feet. 16 gauge is rated for only 10 amps at that length.


12 volt wire amps/gauge chart below.
Attached Thumbnails
WireSelectionChart111111.jpg  
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post #6 of 6 Old 09-21-2020, 09:17 PM Thread Starter
Banditware
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I just put a manual switch in. Problem solved and no check engine light either.
Thanks all!
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