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The Terminator
Engine/Tuning
Help troubleshooting radiator fan not coming on while driving
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<blockquote data-quote="TheFleshRocket" data-source="post: 17035936" data-attributes="member: 48535"><p>I disconnected the fan harness and drove the car for about 10 minutes to get it warmed up. With the coolant over 190F (the temp at which high-speed operation should begin), only the high-speed lead was hot according to my 12V test light. (In my picture above, it's the lead that's at the 1:00 position. The low-speed fan lead is in the 10:00 position.)</p><p></p><p>What this seems to indicate is that everything is working fine up to the fan harness connector. Since the fan comes on if I jumper power to its high-speed circuit directly from the battery, the problem must reside at the connector itself--apparently the lead from the harness is not making a connection to the lead into the fan. </p><p></p><p>Both connectors look good so I'm not sure why they're not making good contact--I'm going to let the car cool off before inspecting any further. But I'm just about positive I have the cause of the problem figured out.</p></blockquote><p></p>
[QUOTE="TheFleshRocket, post: 17035936, member: 48535"] I disconnected the fan harness and drove the car for about 10 minutes to get it warmed up. With the coolant over 190F (the temp at which high-speed operation should begin), only the high-speed lead was hot according to my 12V test light. (In my picture above, it's the lead that's at the 1:00 position. The low-speed fan lead is in the 10:00 position.) What this seems to indicate is that everything is working fine up to the fan harness connector. Since the fan comes on if I jumper power to its high-speed circuit directly from the battery, the problem must reside at the connector itself--apparently the lead from the harness is not making a connection to the lead into the fan. Both connectors look good so I'm not sure why they're not making good contact--I'm going to let the car cool off before inspecting any further. But I'm just about positive I have the cause of the problem figured out. [/QUOTE]
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Help troubleshooting radiator fan not coming on while driving
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