fan clutch, cut wires, repaired
I just thought I would add this information, since I had read some conflicting information about fixing a fan clutch wiring harness.
I had the fan clutch and radiator replaced in the fall, and it worked fine for a while, but then truck shut down for unknown reason; no ECM communication. Turned out to be a blown ECM power fuse. Drove it for a few weeks, and it blew one more time, then no problems for a few months.
Had it in for a check up, and the shop said fan clutch had failed.I checked the wires, and they had been cut by the fan. When I touched the harness end inside the rad shroud, it blew the ECM fuse again, so I unplugged the connector, replaced the fuse and was good to go.
This weekend, I got in there and found that the fan clutch wiring was just hanging down, but not broken off of the metal disk in the center of the fan clutch, so I went to work soldering and lengthening the wire harness by about 4" so it could be spaced away from the fan blades and closer to the radiator.
Since it's cool here, fan doesn't come on, but I don't want to wait until it needs to work to fix it, so here's a pic. Seems to be working, since no more codes.
I found that there were 5 wires used, but 6 inside the plastic insulation. The blue wire was not connected, and seemed to be a nylon thread inside rathert than copper wire ( ?? ). So, I'll update this thread when I have a chance to get the fan to come on.
2006 F250 ext cab, short box, 4x4 auto
ARP studs, BPD EGR cooler, Ford oil cooler, HPOP and turbo line updates (by Bernhausen @ 219K Kms)
BPD billet water pump, AFE CAC pipe
Eng. strategy VXCF9H7; TW Extreme tune
4" SS Magnaflow turbo back w/ muff & hi flow cat.
Edge CTS monitor w/ EGT
CAT EC-1 coolant w/ bypass filter
stock air intake w/ shielded Zoodad
3.73 axles, 275/70R18 BFG A/Ts
To do: injectors, Snow Stage 2 water injection, blue spring, fuel press sensor
metric convert here