You could have had an Opus 45DE4 equipped car, or a CEI 45DM4 equipped car,
and the wiring to the ignition is very different for each. However both
originally had a 6v coil with a ballast wire in the loom, which exits at the
coil as a pair of white/light-greens. To run a 25D4 (or a 45D4) this is the
only wire you need from the loom to the coil, plus the white/blacks from the
coil to the tach and distributor. What are you trying to do? Restore it?
Or just tidying things up? Purple wires are fused but always hot, around
the column they are for the headlight flasher and horns (later models only).
----- Original Message -----
From: "Robert Guinness" <rjglaw@swbell.net>
To: "MG listserv" <mgs@autox.team.net>
Sent: Friday, May 30, 2003 11:20 PM
Subject: 77 MGB wiring
> Please take pity on my poor ignorant, DPO inflicted soul. Can anyone
> with a "correct" 77 MGB send me digital photos showing in very close
> detail, the wiring from and to the coil, distributor, and fuse block.
> I have no clue where to begin unravelling the mystery of what wires the
> DPO cut off to install a 25D distributor. There is not even a wire
> feeding the coil. There is an obviously DPO "installed" red wire
> threaded through the heater cable outlet in the firewall. It goes to
> the proximity of the steering column. By the way, were does that purple
> wire with the flange "thingy" dangling from the ignition switch supposed
> to go?
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