Not two white/brown on the starter relay, but one standard gauge white/red
from the ignition switch and one thicker gauge white/brown to the solenoid.
I'm assuming this is for the 76 as MGBs didn't have one until 1970. As such
it could be a plastic relay, which could well have heat damage from poor
connections internally i.e. bad contacts, although this would normally only
affect continuously operated relays which the starter isn't of course. Before
76/77 the relays were metal canned so only show heat damage on the fibre base
that carries the terminals. Of course of the relay has been hanging loose the
brown terminal may have been shorting out, but that is likely to do more
damage to the wiring than the relay case!
Even though putting the battery on another car has proved the battery itself
OK, it could be battery cable connections. Turn the lights on then turn the
key to crank and if they dim right down it is battery or connections, if not
it is the starter circuit.
If not that and you can't even hear the relay click when you turn the key to
crank (you should if you have the door and bonnet open) then it could be there
is no voltage coming from the switch, it isn't getting to the relay on the
white/red, or indeed the relay *is* faulty. You can check the latter by
bridging the brown wire to the white/red terminal. If the relay clicks the
problem is with the switch or the white/red wire. If it doesn't then the
earth to the relay could be bad, you really need a meter to test/lamp to test
with now to check the voltage conditions on all four wires with the key both
operated and released, as there could be more than one problem anyway.
If the relay clicks but no crank connect the brown to the white/brown and that
should cause the solenoid to operate and the motor to crank. If it does then
the relay is faulty, if it still doesn't then either the 12v supply on the
brown is bad, the white/brown to the solenoid is bad, or the solenoid itself
is bad.
PaulH.
----- Original Message -----
Ok, the symptoms are turn they key, no sound (from the starter) at all.
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