charging on the super A eh!!!!

Any Original switch with 3 positions (ODB) has no connection to charging it is done by the Voltage regulator only.
Any switch with 4 positions (LHDB) controls charge in all positions. L is low charge, H is high charge, D is high charge and dim lights, B is high charge and Bright lights. Jim
 
Systems with a cut out had the 4 position light switch. Systems with voltage regulator had the 3 position light switch, and the 3 way switch had nothing to do with the charging. The voltage regulator did that part on its own. Not sure when IH made the change on the letter series.
 
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