You seem to have the right wiring for a 12v coil, maybe the loom has been
replaced (possible) or someone else has done a conversion (less likely, I
would have thought). For a "second opinion" have a look at the starter
solenoid. Those for 6v coils have an extra spade with the other end of the
white/light-green that is used to raise coil voltage during cranking.
PaulH.
http://freespace.virgin.net/paul.hunt1/
-----Original Message-----
From: Steve Shoyer <steve@shoyer.com>
To: mgs@autox.team.net <mgs@autox.team.net>
Date: 14 March 1999 20:09
Subject: 1980 B getting 12V at coil?
>I replaced my stock coil with the Lucas sport coil, and I wanted to bypass
>the resistive cable to get full voltage at the coil. When I measured the
>voltage at the coil with the car running, I got roughly 12V instead of the
>6-9V I was expecting. Does this make sense? The car is a 1980 B with the
>45DM4 distributor. The wiring diagrams in the Haynes and Bentley manuals
>both show the ballast resistor, resistive cable, and a white/light green
>wire going to the coil. I couldn't find any white/light green wires going
>to the coil, just white on one side and white/black on the other.
>
>The car seemed to start and run OK when I opened the spark plug gap to
>.040", so I think I'm OK, but I don't know why. Any ideas?
>
>--Steve Shoyer (1980 MGB)
>
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