I just finished rewiring my 1965 1550 gas when I got the tractor the wiring was a mess and nun of it was original so I decided to rewire the tractor all parts are new. alternator,regulator starter, switches, wiring, battery, cables, etc. when I started tractor for the first time after finishing wiring it did not charge so I put a jumper on the alternator and it charged 15 volts I put a jumper across the regulator and it started charging I can pull cover off regulator on push contactor and it starts charging until I cut the tractor off and restart it and it doesn't charge again. I used the wiring diagram in my owners manual to make the new harness. does it sound like I have it wired wrong or did I buy a bad regulator. I haven't been able to locate a service manual yet. thanks