1948 AC B wiring

BIGJOE

New User
is a 1948 Allis Chalmers B positive ground or negative ground? I am finishing a restoration started by my grandpa and have no clue if its a negative or positive. Thanks for your time.
 
Yep till the late 50s, early 60s almost all tractors where + ground if they where 6 volts.
 
1947 b only pops and some smoke, but will not start. the F mark and #1 are right. need all the help i can get. thanks,tom
 
Mag or distributor?? Hard to help with out more info. If its a mag drop me an e-mail and I'll send you the manual for that mag.
 
IT IS A DISTRIBUTOR, ALSO IT IS A C NOT A B. IT IS STILL 6 VOLT,BUT IT HAS POS. GROUND. I DONT THINK THAT IS RIGHT. THANK'S. TOM
 
+ ground is as it should be and it was that way when new. Now as far as spark you could have a simple bad switch, bad wires, bad coil, dirty points, cracked cap bad rotor or the insulator going in the side of the distributor could be bad
 

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