On to the next little problem - oil pressure warning light always on. I
fitted a new pressure switch a while ago, which made no difference so
checked today, and found that the light is on (with ignition) even when
the wire to the sender is disconnected. Inspected the loom, with no
obvious damage, which suggests a short to earth somewhere in the rat's
nest behind the speedo. Bugger.

Being a late (68) model, there are two yellow oil warning lights, one
for low pressure and the other showing clogged filter. I have never
seen the clogged filter one lit in 22 years, so tested it by shorting
the connection to earth, and it works.

Oh well, out with the speedo.
--
Graeme