Here is whats todays testing revealed.

Engine off, key switch off, master bat on
Bat voltage to bat on reg and at alternator - 12.02 volts

regulator disconnected - continuity between bat tab and main coil, cont between main coil output and field coil

With everything connected 11.75v engine running

Engine running bat voltage to reg and 0 v to field output tab on reg.

edit checked the cont on the VR to ALT gnd - OK field fire - OK cleaned all contacts

Checked for voltage to the field output on VR -0v from bat tab or bat + key swich on motor not running

I will continue when the weather cools
off a little, over 100 outside

Last edited by 62ChevC60; 06/06/2011 1:33 AM.

Rick
62 C-60/Towers Fire Apparatus Fire Engine