Start with the two greens (these are MGB colours, can't be sure how close
they are to yours) on the hazard switch. With the hazards off and the
ignition on both these should have 12v.
If only on one green and not both either the switch is on, wired
incorrectly, or faulty.
If on neither check the green wires at the fusebox all have 12v. If not the
problem is with the ignition or fusebox, if so then probably one of the
several connectors linking green wires behind the dash is corroded or pulled
apart.
If both greens in the first test have 12v move on to the turn flasher, the
green and light-green/brown there should also both have 12v. If neither
then there is a break in the green between the hazard switch and the turn
flasher, but that is unlikely as it should be a direct wire. If on the
green but not the light-green/brown the turn flasher unit is faulty.
If on both move on to the turn switch. If not on the light-green/brown at
the turn switch there is a break in that wire between there and the turn
flasher, which is quite possibly in one of the connectors joining the main
harness to the switch harness, which may be multi-way plugs. Even when
pushed fully together individual pins can get pushed out the back of one of
the plastic mouldings, or otherwise not be making good contact, test both
sides of the connection.
If on the light-green/brown at the turn switch operate it first one way and
then the other and check that 12v appears on the green/red and green/white
wires at the switch. If not the switch is faulty. If so, but the corners
still don't light, check these wires in the steering column connectors as
above. From there out to the lights the circuit *should* be the same as for
the hazards.
If they still don't work, go through the sequence of tests above again, but
this time operating the turn switch on and off which you are measuring the
voltage. If the terminal shows 12v with the turn switch off, but drops with
the turn switch on, there is a bad connection back towards the fusebox. If
you find two points where on one the voltage does drop and on the other it
doesn't, then the fault is between those two points.
PaulH.
----- Original Message -----
> ... No turn signals at all...not even the glow, but the hazards
> light up.
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