I use a dc power supply putting out around 13v to check everything's working while I'm wiring and not kill a battery
. In the above pic from the section hh in the upper right the battery
shows - to red to earth brown blue to +, while the earlier wiring diagram in section h has - to brown blue red to + earth.
The bike had the Boyer
unit installed and another Boyer
triple ignition in a box possibly older or a spare with the instructions that I using the ignition diagram from. It had no provision for - earth but in a list of tips it said the bit about being fed from.positive. to compound matters there is what looks to be a tympanum Harley reg/rec wired in there. Allegedly the bike ran. Even tho the link failed I'll check the Boyer
website for updated instructions.
Edit: no battery
was hooked up on the bike when I got it and the wiring was pretty messy, I'm just trying to see whether this guy had it hooked up negative ground. Not even near starting it. Just getting the lights horn and stuff straightened out. The fellow took out the light switch and converted it to a Lucas
handlebar switch by using the same switch on both sides, just wading thru the mire.....