check the fuse and relay for the stock e-fan, im willing to bet that your problem is one of those

 

If all else checks out, it is possible the fan itself may have gone bad.

 

Looks like I have a dual trouble. The Rad Fan relay was actually bad. That was the first thing I replaced, but managed to swap it with the engine relay on accident. I hate that upside down legend. Once I replaced the proper relay, I again had 12 volts switching the relay on. The fan on the other hand, I had 1 time been able to get the fan to turn on, but didn't leave it running, just assumed it was good. Its almost like it tripped something in the fan. I don't know how a two speed fan is wired, but the odd thing, when it should be running, I have the high side wired right now, I can measure 12 volts on the low side, which isn't connected. Could be normal I guess. I measure 1 ohm between the high and low speed wires. Whether or not that means anything I don't know, but it looks like a new fan is in my future.

 

If you can give me until tomorrow I can measure the resistance between the two sides on mine. I'd do it now, but I'm not feeling that well right now and don't want to go outside.

 

Whenever you can get around to it would be great. Thanks a bunch.

 

Ok, I went outside a measured the resistance between the high and low wires to the fan and got 1ohm of resistance. So that along with seeing the 12v on the low side when running the high side should be normal. Thinking about it, it makes sense because the fan only has one motor and apparently the two speeds must share the same windings in it too since there is such little resistance. The fan must have some sort of internal mechanism to switch the speeds based on which wire has voltage. Anyway your fan should be fine.

 

Thanks for checking. It doesn't make sense for the fan to be bad, but I cannot get it to engage, even when powering it directly from the battery. I'm going to keep tinkering with it.

 

I did now know our E-Fan's has two speeds? My Efan only runs on High speed or single speed only?

 

They don't, we're talking about the taurus fans that we swapped in

 

Mystery continues..