I thought I had the lights working OK on my car, but when I was working on it
Saturday I noticed that the side, tail, license plate, and reverse lights come
on with the ignition switch in the "On" position. I didn't notice that the
last time, but it could have been the case. I swapped my ignition switch
harness with one from a parts car, but the same thing happens. I've
disconnected the main light switch that should control most of these functions,
but it doesn't change the result. I tried testing the switch, and I think it
is working correctly:
Switch W WG WR S
position
Off 0 0 0 1
I 0 1 0 1
II 1 1 0 0
III 1 0 1 0
I believe that the S line goes to the anti-run-on valve, the WG to the radio,
WR to the starter, and W to the normal "ignition on" circuits.
The strange thing is that I checked the connector where the switch plugs into
the main harness for continuity between pins, and the N, W, and WR pins showed
a connection.
Does any of this make sense? I've traced the circuits in my Bentley manual but
I can't see where the problem might be. I'm guessing there's a short somewhere
- any suggestions on tracking it down?
Thanks.
--Steve (1980 MGB)
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