![]() If you do NOT have INPA/ISTA or something that can "Activate" the E-Fan, about all you can do is test as follows:ġ) With engine running, turn on A/C Compressor. See the attached ISTA ScreenPrints showing the Fan Wiring Diagram, Power supply, Lines ID, & X1797 Connector View. If the fan electronics are NOT alreadyĭamaged, you would likely damage them by applying 12V+ to Pin #4 (the small wire). ![]() HOWEVER, you CANNOT get the Fan to run by applyingġ2V+ & Ground to the two large wires, Red/Blue at Pin#2 & Brown at Pin #1. Signal via the Black/Blue wire to Pin #4 of Connector X1797. If you had INPA/ISTA, you could "Activate" the fan by sending a speed The E-Fan has a built-in Electronic Control. The short answer to your question is: "You DON'T". ![]() My radiator fan will not turn on I just want to see if it's the fan or something else. ![]()
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