Print Page - b31 alternator help wanted

Title: b31 alternator help wanted
Post by: EDDIE SIMPSON on 24 Jan, 2021, 00:34

hello, can anyone with an alternator b31 help me with correct coil location . a photo would be most welcome.

Title: Re: b31 alternator help wanted
Post by: paulm on 25 Jan, 2021, 21:02

in the tool box top shelf

Title: Re: b31 alternator help wanted
Post by: EDDIE SIMPSON on 28 Jan, 2021, 00:36

thanks paul . i suspected it went there. my next question is what does the black and white wire at the ignition switch connect to on emergency start position?
in can only think of it acting as a return to the earth at the alternator via the prs8 ignition switch. not used with ign on position.

Title: Re: b31 alternator help wanted
Post by: JulianS on 28 Jan, 2021, 09:52

Dont know if this circuit diagram will assist.

Second photo shows schematic of the 6 volt setup for EMG position.

Title: Re: b31 alternator help wanted
Post by: EDDIE SIMPSON on 28 Jan, 2021, 22:10

thanks julian, i did conclude what the last drawing showed; charging the coil - and points + earth return to all 3 coil circuit of the alternator. i have the first drawing but i think its drawn wrong with in reality 15 16 and 17 all connected in emerg start.
however i ve gone 12volt but just had to know what that extra black and wire was for.

BSA Owners' Club Workshop Discussions

The BSA Workshop => Singles => Topic started by: EDDIE SIMPSON on 24 Jan, 2021, 00:34