Neighbor/friend has a 2014 Honda Rancher 4x4 model TRX420-FM2 with a cooling fan problem. Spent 6 weeks at the local Honda shop to repair inoperative fan. EFI workhorse used on an extensive farm starts, idles, runs well, all systems operational except cooling fan. First sign of problem was over temp light and electric steering boost quit (normal for overheating).
Dealer installed O^2 sensor and claimed machine repaired. It was not as it still would illuminate high temp light, power steering light, ps would quit and the fan would not come on. This friend was desparate to use this machine and wanted it either repaired or a fan switch jury rigged so he could actually use the machine. I obliged and inspected the rig for fan motor ability to run, location of temp sensor, location of an EMI filter and location of a fan control unit.
Fan was proved to operate by jumper wires direct to battery. Unable to locate any of the other units thereby unable to continue troubleshoot. Rigged a fused line direct from battery with switch on handle bar.
Service manuals available on line for purchase. Wiring diagram found on line for similar model confirms temp sensor and fan control unit but no identifiable EMI unit (may either be in fan conrol unit or not used).
I assume that a major Honda dealer would have both a relevant service manual and a wiring diagram for every model of Honda product for the last ten years. I also would assume a major Honda dealer would have at least a competent tech/service manager capable of looking for possible causes of an inoperative fan on a very popular four-wheeler model. My assumptions would be incorrect in this case.
This is the kind of dealer incompetence that angers me to no end plus this same dealer blew smoke at my friend about an O^2 sensor which had nothing to do with an otherwise fully operational machine just to cover the thing being in his shop for 6 weeks. This is the only dealer within 40 miles. Others exist at greater distances. This dealer is where the machine was purchased new.
Now, tell me there is no problem.