Six volt horn without a factory relay doesn’t sound? If you use the original 6 volt system, you “cannot” use the gray plastic incased brush and contact that also slips into the steering wheel hub on the 1947-52 First series Chevrolet/GMC Trucks. This is made only for the 12 volt second series 1955-1966 trucks. (Or can be used with 1947-55 with a 12 volt system)
Unfortunately for the 6 volt people this incased brush and contact also fits the 1947-55 steering wheel. It burns out instantly when their horn button is pressed if you have on original 6 volt system! With a complaint to their supplier, the owner may receive a replacement but it is ruined just as fast. NOW both buyer and seller are lost!
ANSWER: The 6 volt brush and contact has a heavy woven wire inside that carries the extra electric flow needed for the original system. It is not incased in plastic as is necessary to protect the single fine gauge internal wire of the 12 unit. The 6 volt brush and contact fits into a non-metal black cylinder which is separately pressed into the steering wheel hub. This cylinder should be found in the hub even without the brush and contact. They are two separate parts. See Photo.
BEWARE: If your supplier tells you the horn brush and contact is the same on 6 and 12 volts during 1947-55 he is a “lost ball in high weeds”. Don’t buy it if you have a 6 volt system!!
The correct replacement is now available from Jim Carter Truck Parts and a few other full stocking dealers. Pricing about $7.50 to $9.50. Our part # EL520.
1947-55 NOTE: Heavy Copper Internal Cable 6 Volt
1955-66 Fine Gauge Wire Incased, for protection 12 Volt(only)