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The Terminator
Engine/Tuning
Help troubleshooting radiator fan not coming on while driving
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<blockquote data-quote="01yellercobra" data-source="post: 17035560" data-attributes="member: 35549"><p>I don't remember details, but the low speed signal is reversed. Meaning it applies a signal to the low speed relay to turn it off. Ford does this so that if something happens to the circuit the fan will default to on. The reason the fan comes on during the flash is the signal to turn off the fan is not there.</p><p></p><p>If you have a hand held I wonder if you can set the fan temps to something really low, like 50 degrees, so they come on? You can set them both to the same temp and check power at the same time.</p></blockquote><p></p>
[QUOTE="01yellercobra, post: 17035560, member: 35549"] I don't remember details, but the low speed signal is reversed. Meaning it applies a signal to the low speed relay to turn it off. Ford does this so that if something happens to the circuit the fan will default to on. The reason the fan comes on during the flash is the signal to turn off the fan is not there. If you have a hand held I wonder if you can set the fan temps to something really low, like 50 degrees, so they come on? You can set them both to the same temp and check power at the same time. [/QUOTE]
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Help troubleshooting radiator fan not coming on while driving
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