[john Walsh]

Fan / Blower motor works intermittently, A/C or heat. Will not turn on for hours or Will run fours hours non stop down the highway. One day, cycles on and off every two minutes another. Can do the same thing in the driveway. Checked everything on the Ford schematic, relays, fuses, switches, wires. Seams to be tied to the mystery of MH wires for which a schematic hardly exists. Going to check this Relay now, thanks for sharing the info.