...... ), no flow of water (current), max pressure (voltage). Open valve (ign sw on), water flows (current ............ ), pressure drops, (voltage drops). Twelve volts with ign sw on IGN, and ............ flows, as circuit is complete, then lower voltage. It may be true with yours, but a previously ............ R terminal on solenoid to coil + for start voltage. My previously owned '68's had twelve volts from ............ sw START position, but yellow wire was still installed and I ............ charge battery overnight. Next day, check voltage on disconnected yellow wire and disconnected ............ current device and expect a drop of battery voltage, but not lower than nine volts, typically. "Need ......