After having 2 standard "3 to 2" or "5 to 4" Tail Light Converter go bad on me over 2 years, I finally decided to try something different. Because I didn't want to install relays and run all the associated wiring, I purchased 2 BA15 18 High Power LED Tower bulbs (Red 1157-R18-T) from Super Bright LEDs
which only draw a fraction of the current that regular 1157 bulbs draw. I installed these in the independent Toad Tail Light enclosure replacing the 1157s. In addition I purchased another new "3 to 2" Converter (Curt Mfg. Part #56130). After the installation I tested all lights and they worked normally except for the turn signals which worked fine but "flickered". I presumed this was likely a function of the Vanesco multiplexed electrical system.
Later, I happened to visit the Curt Manufacturing
website and found that they actually had a Tail Light Converter
for a Multiplexed (Vanesco) system. The only drawback to using one of these converters is cost. The standard converter cost about $17, and the converter for a Multiplexed system (PWM) is about $80. Ouch! I was glad I tried the upgraded LED lights and the standard converter, but if that fails I now know what the correct converter should be. I think that Curt Mfg is the only manufacturer at this time that sells a converter for a Vanesco system.