I finally had some time to work on this problem again. I used a light bulb to test the circuit in a variety of places. The problem was in the converter. Good amperage coming in, inadequate amperage going out. Replaced the two bulb to one convertor and everything is working fine. Have no idea how those converters work but something was awry inside. Thanks for all the help.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13