Unit is in RV. Pilot light won't come on & stay on. When put on "automatic" the gas light indicator comes on along with the "check" indicator. Could that be because of a low 12 V circuit? Same description while a charger is hooked to the low battery. The wiring diagram is in a pitifull place -- on the floor --where it catches any incoming water and/or dirt. Can't read it worth a darn !