Looking for feedback on this issue. Port engine and Starbd.engine will not start unless i have P & S battery switches in the All positions. After starting i can switch to normal P#1 and S#2 but if i turn engines off at key i then get nothing. When they run both run fine but i don't want to leave in parallel. Can battery switches go bad? (Guest 2300A) or should i be looking elsewhere
1986 454's
Port:
Battery load test ok
Grounds at battery and block verified clean and tight
Coil Pertronics Flamethrower II
Electronic Dist. Pertronics ign II
Starbd:
Battery load test ok
Grounds at battery and block verified tight and clean
New starter
Coil and Dist same as Port
1986 454's
Port:
Battery load test ok
Grounds at battery and block verified clean and tight
Coil Pertronics Flamethrower II
Electronic Dist. Pertronics ign II
Starbd:
Battery load test ok
Grounds at battery and block verified tight and clean
New starter
Coil and Dist same as Port