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Old 03-30-2003, 14:01   #1 (permalink)
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electric fan temp sensor

Somebody help! I have an '89 Mustang LX convertible with a 2.3L, automatic. While I would love to have a 5.0L, this will do for now.

My problem is that while cruising on warm or hot days the engine will start to warm up, as normal. But the electric fan does not kick on when it is supposed to. If I notice that the temperature gauge is getting too high, I kick on the A/C for a few seconds (which is apparently enough time to kick on the electric fan) and the engine cools down as it should. But, the fan will not run by itself when the temp gets high, only when I kick on the A/C.

While I love driving around with the top down, I don't want to always worry about the car overheating. I have taken it to a couple of "mechanics", but they just scratch their heads.

Help please!

Thanks,
Jim
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Old 03-30-2003, 20:26   #2 (permalink)
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Apparently the mechanic's aren't doing there job's. This little engine require's a 50/50 mix of coolant year round is this the case? Has the thermostate function been checked? You say that the fan does kick on when you turn on the a/c so you know that the fan does work. The fan sensor your looking for is located in the head. There are three of them. 1 for the tempature gauge or light. 2 for computer use. 3 fan sensor. The one for the computer has multiple wire's, disreguard this one. The easiest way to locate the one you need is to turn on the key and while someone is watching the the gauge or light pull the wire from one of the sensor's and ground it. If the light come's on or the gauge peg's out on high replace the wire, this let's you know that it's the wire to the gauge or light, and not the one you need. The other single wire sensor is the one that supply's the ground to the fan. If during the first test the fan came on this is the wire to the fan sensor.
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Old 03-31-2003, 09:32   #3 (permalink)
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Thanks for the input! You're right, the mechanics have not been a great source of confidence!

Although I'm traveling this week, I'll try your response this weekend.

Thanks again,
Jim
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