I HAVE CHECKED WIRE CONNECTIONS IN FRONT COVER BATTERY VOLTAGE AT BATTERY 12.43 VOLTAGE AT FRONT COVER 12.38 WHEN I TURN ON BOTH GPS UNITS VOTAGE AT BATTERY 12.39 VOLTS AT FRONT 11.98 WHEN I TURN KEY TO START VOLTS DROP TO 10.04 AT BATTERY AND 9.8 AT FRONT.Last edited by jigfish on November 25th, 2009, 12:44 am, edited 1 time in total.