hello, I'd test the wiring circuits at the relay, when the problem occurs. The red wire is voltage for high-speed, should be hot all the time. The right side of diagram is the load side, carries voltage to the motor. The left side of diagram is control for the coil side of relay, those squiggle lines. When the relay is energized, that arm on the load side will switch to the red wire terminal. If the relay just plugs into a socket, you probably can't see the wiring colors, usually the relay has a wiring diagram on top.
Saturday, July 25th, 2009 AT 2:37 PM