Low Voltage At One Coil

Information and questions on GL1200 Goldwings (1984-1987)
Post Reply
User avatar
Posts: 24
Joined: Thu Oct 20, 2011 12:40 pm
Location: Whitney,TX
Motorcycle: 1979 GL1000 full dress

Low Voltage At One Coil

Post by pappajim0719 »

Key On voltage measured at the coil connector, using the same Black/White hot wire as Positive

Yellow/Blue voltage is 12.5
Blue/Yellow voltage is 0 also probed wire at the ICM, it was the same.

When cranked, Y/B jumped to 16+
B/Y increased to 6


Ride like everyone on the road is trying to kill you, or one of them will.
User avatar
Site Admin
Posts: 23614
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (sold)
1998 XV250 Virago (sold)
2012 Suzuki Burgman 400 (wife's!)
2007 Aspen Sentry Trailer

Re: Low Voltage At One Coil

Post by WingAdmin »

It's by design. The engineers knew the voltage would be low when the bike was being started, because a lot of power is going into cranking the engine, so they have the bike boost the coil voltage during the start cycle.
Post Reply