I ran a groung wire straight from battery (not running) and got 7 volts at brake wire in trunk. Checked voltage on battery not running and got 12.25 v, got 13.5 volts with motor running at 1500 rpms. Tried to check voltage at alt (3 wires) not sure which wires to touch and a little intimidated. To be honest, I hate to bother bulk head connection if no other problems. Thanks Dave