sorry for taking so long to reply.

with battery connected and key off

s terminal is at 12.34 (as expected)

L terminal  at .01 (as expected)

with battery connected and key on

at L terminal .01 (not expected, battery voltage)

 

I am including some images of me using meter with results. Also a couple of connections. 

Not sure where to go from here. If i had to "guess" i would say i likely messed up the 

alternator conversion plug somehow

 

20 minutes ago, Wally said:

sorry for taking so long to reply.

with battery connected and key off

s terminal is at 12.34 (as expected)

L terminal  at .01 (as expected)

with battery connected and key on

at L terminal .01 (not expected, battery voltage)

 

I am including some images of me using meter with results. Also a couple of connections. 

Not sure where to go from here. If i had to "guess" i would say i likely messed up the 

alternator conversion plug somehow

If I were to hazard a guess, I would say you have your diode backwards on the L terminal circuit. The other alternative is that there is a bad connection in the circuit.

To elaborate, the black/white wire should be on the anode side of the diode, and the white/black wire should be on the cathode side.