AC failure diag help. The saga continues.

[Bdc101]

Hi all,



Thanks for all the help you guys have given me so far (clavurion, overboost, andrewwynn, upallnight, etc)



Last week I found that the AC is not turning on because the DME is registering an aux fan fault.



I was able to find a used but good aux fan, plugged it in, and it did not operate. I cleared the fault, and it came back.



I checked for voltage at the aux fan connector:



https://www.newtis.info/tisv2/a/en/e...ic-fan/o65COqX


Terminal 4 (big wire, red w/ blue stripe) should have battery voltage but has nothing. It comes directly from fuse F61 in the glove compartment fuse box. I checked the fuse and it is good. I also checked it with a DMM and it has continuity. Then I turned the car on and confirmed that it does have 12 volts on both sides of the fuse. Still, nothing at the connector in the engine bay.



Newtis shows this connector X10455 as having the red/blue wire in question, but the only wires coming out of it are red. The one next to it (X10454) has one red/blue wire. All four of the wires coming out of it have 12 volts.



https://www.newtis.info/tisv2/a/en/e...0i-sav/UnTx4fi


The first wiring diagram above shows a continuous wire going straight from fuse F61 to my connector. But clearly that is not the case. It's not the same color wire. But even if it was mislabeled and it was actually on X10454, I don't get continuity to any of the four wires shown on the two connectors in this diagram.



I'm super confused now. How can I have no blown fuse, power at the wire on the glove box side, and nothing on the connector side? If it had a short it would have blown the fuse. There is maybe 5 feet of wire total, and the only place I can't inspect it is where it goes through the firewall.



One other thing to note is that the red/blue 12v wire to the fan is indeed skinned at one bend. It doesn't show any signs of arcing or burning, and it looks like it's been that way for a while. I can't see why that would cause the problem though, because the fuse is not blown.



Is there ANY reason why I wouldn't get 12 volts at that connector?



I did find at least one other aux fan issue just like this while searching, but no resolution.



Where could I possibly look next? The only thing I can think of is running a new wire from that fuse to the fan.