I installed a remote start module in the truck. Everything works but the alternator is not charging the battery yet was just tested as good. the "dummy" battery light does not come on at any point including keys in on position with the car not running. This leads me to believe the brown single wire to the alternator telling it to "energize" and also connected to (via the basic universal Haynes wiring diagram for the full spectrum of gmt400 trucks) the battery dummy light is not receiving signal when the ignition is in the on position. Seems to me in the wiring diagram if the battery light doesn't have power then the brown wire from that to the alternator does not have power and the alternator is not being told to energize. I switched the battery bulb with a light I know works in the dash. the working light continues to work and the battery light does not. Are you supposed to see the battery indicator before cranking? If so do I just need to somehow chase the brown wire that is behind the dash plugging into the back of the instrument panel?