On vehicles with intermittent windshield wipers, the wiper motor circuit board may fail and cause the wipers to stop working at times. Replacing the circuit board should resolve the issue. Some vehicles were recalled for this problem and some were not. You will need to check with your local dealer to find out if a specific vehicle was included.Google+
Car Problem Reports
Isuzu Hombre Failed Wiper Motor Circuit Board May Cause Intermittent Wipers to Stop Working
Isuzu Hombre Problem
Visitor, 1997 Isuzu Hombre
Intermittent Wiper and I have found out that the PCB broken connecting the motor terminals, i just clean the pcb solder it with jumper to have a stronger connection. it is now 3yrs since and still working.
Visitor, 1996 Isuzu Hombre, 152,700 mi
Replaced motor and still have same problem. Going to locate the circuit board to replace.