suffolkpete
Member
The 25 amp fuse supplying the wipers on my 2200SC keeps blowing. I've traced the source to the delay unit. The problem seems to be that when the unit is at rest ie with the plunger fully extended, the moving contact in the unit is held in position by the metal cup on the rear of the vacuum diaphragm. Because the moving contact (terminal 1 on the delay unit is live then the plunger is also live, thus when the motor arm touches the plunger, half way through the sweep, a dead short occurs and the fuse blows. It appears to have been designed this way but that can't be right, am I missing something?