It's on a bobcat z that we have in the shop. spec is a 67531 for the motor. Checked ac at staor and got 28 even. checked at b+ on regulator with unit runnign ang got 13.5 or 6 but when checked at battery only get 12.7 or 8 and when clutch is engaged battery shows 12.3 or 4. I tried another regulator i had at the shop and identical readings. I did a continuity test from purple wire at b+ on regulator to positive of battery and there is continuity, with the key in the on position. Any thoughts? I know i should be in the mid 13's when no pto and high 12's when it's on.