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What is voltage for RAD fan High Speed....

18894 Views 32 Replies 6 Participants Last post by  TaxiGirl
Control #2 circuit board TIPM that goes to K175 High Speed Relay on pin 86 when tipm is turning the fan to high speed?

Is it a low voltage like 3 volts or something like that for signal or is it 12 vdc power?

Thank you.
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I would really try to find and fix the root cause first. If you try to add a manually-controlled switch to the cooling fan relay, you will likely be driving around with the 'ck eng' light on.
This is something that should be under PCM control. The PCM may call on the TIPM to actuate the relay. A skilled diagnostician should be able to find and fix the real problem here.
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