Coolant Fan Not Working

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Coolant Fan Not Working

Postby rodeo64 » Fri May 19, 2017 7:15 am

How can I test whether the large electric fan attached to the radiator is working? Is it controlled by a fuse or circuit breaker?
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Re: Coolant Fan Not Working

Postby itsmehb » Fri May 19, 2017 11:31 am

What model and year and engine size. I know on the 2000 Amigo I had, it had a single 2 speed fan. It always came on with the air conditioner, and when the a/c wasn't on it only came on when the temp sensor told the ecm the engine was getting hot. At that time the ecm would tell the fan to come on, usually by providing a ground for the fan relay. Mine was protected by a fuse. Different years and models operate differently, but I believe they all run when the a/c is on.
1990 Amigo, 2.3 5 speed (sold)
1991 Pick up (long gone)
2000 Amigo, 2.2 5 speed(sold)
1985 Trooper 1.9 4 speed (sent back to KS)
1989 Trooper RS 2.6 5 spd. Red

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Re: Coolant Fan Not Working

Postby rodeo64 » Fri May 19, 2017 12:05 pm

2002 Rodeo LS, 2WD, auto with AC, 3.2 L V6. Mine has never ran since I got the vehicle a month ago.
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Re: Coolant Fan Not Working

Postby Buster28 » Fri May 19, 2017 2:33 pm

The engine coolant fan on a 02 Rodeo 3.2L V6 is driven by the serpentine belt. The electric fan cools the Air Conditioning (AC) condenser coils. The condenser fan is controlled by the condenser fan relay which is controlled the AC triple pressure switch (Auto transmission) or AC dual pressure switch (Manual trans). The condenser fan will operate when the AC high side pressure reaches a pressure of approximately 1471 Kpa.
02 Rodeo Sport 4X4 3.2L V6
01 Rodeo Sport 4X4 3.2L V6
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Re: Coolant Fan Not Working

Postby rodeo64 » Fri May 19, 2017 3:57 pm

For my vehicle, I have checked the condenser fan relay by switching it out with the headlight relay since they are identical. The fan did not come on. Where is the AC triple pressure switch located?
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Re: Coolant Fan Not Working

Postby Buster28 » Fri May 19, 2017 5:56 pm

Triple Pressure Switch
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02 Rodeo Sport 4X4 3.2L V6
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