IML: AC in 6VDC Cars

[Joe Strickland <jwstrick426@xxxxxxxxxxxx>]

I agree with Dick Benjamin.  6VDC cars are capable of operating heavy 
current accessories well as long as the generator and voltage regulator 
are working properly and the battery/generator system has a good ground 
and source cables.  Mane sure the cables to/from the battery, generator, 
starter and accessory feeds are adequate wire gauge (no. 10 AWG 
suggested) and that all the connections are clean, shiny and free from 
corrosion.  Be sure to check the ground strap from engine block to 
chassis and from the battery ground terminal to chassis.  If any of them 
need to be cleaned do that and when re-connecting make sure mating 
surfaces are also clean.  Use some plumber's silicone grease on the 
connectors to help assure that air is kept away from the contact 
surfaces and they should work well for years.

I would suggest using an adequate circuit breaker in the feed to the 
6VDC blower motors of the AC unit (30 amp. should be adequate, per '55 
factory installation)..  Install it ahead of the blower motor switch if 
not using the Chrysler switch.  The Chrysler switch may include a 
circuit breaker built in (check the '54 and '55 service manuals).   That 
way you can avoid nuisance fuse blowing.  Most of the 6VDC cars used 
them for window lift and power seat motor circuits.  If there is a heavy 
duty generator that was available in '54-'55 models, try to get one and 
use it.  Cars equipped at the factory with AC usually came with a high 
output generator.

Joe

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