On 11/12/2015 17:37, JD wrote:
"Dave Plowman (News)" wrote in
:

In article ,
JD wrote:
The car has no daytime running lights. There is a relay labeled "main"
being an 80A relay. Would that mean 'main beam'?

Dunno.

If there is no relay for the low beam bulbs, this means that the full
current for both low-beam bulbs goes through a single headlight switch
contact, yes?

Not if there is a relay for the headlights somewhere. It would be the dip
switch that then handles the full current.


I cannot find a relay for the low beam bulbs at all. I just made a new
discovery though: the positive side of the low-beam fuse sockets are live,
even when the lights are switched off. I guess this means the power from
the battery goes directly to the fuse box, and then after going through a
fuse, the feed goes to the headlight switch before going on to the light
bulb. This means it could be the headlight switch that's caput, doesn't it?
That's assuming that there is two separate contacts inside the headlight
switch - one for each bulb. If there is only one contact, then the break in
the circuit must be elsewhere.

JD



If you are using a digital meter the voltage you are seeing may not be
'power' as such, but a back feed from another circuit. See if the
'power' you are seeing will actually light a bulb.