Headlight guru required please!

This is only the main beam i'm having the problem with.  

I tracked the main beam wire as being a pale yellow one.  As far as I can see a pair of these come from the fuse box.  Just near the battery one goes off to the passenger side lamp holder and the other goes under and across the front panel  to the drivers side lamp holder. (with a load of other wires for the dip, sidelights, indicators and windscreen wash pump)

Ok with the main beam activated I've got current at both wires (drivers and passenger side). The problem is when i activate the stalk switch to give me full beam, I get a short and the fuel pump primes as if I were turning the ignition on and only the side lights are on.

Can't work out what to do next, any help please anyone. muchos thankos

Hi mate i had simular wierd goings on before with my headlights/switch gear i took off all the earths i could find cleaned them and then put them back and it all worked as it should. Don't exactly know which one was the problem but worth checking all yours out.

cheers steve i will clean up all my earths. where are they mate do you know? cheers

Earth points are

Rosette LH side behind headlamp (LH lights, front washer)
Rosette RH side behind headlamp (RH lights)
Strap from alternator to engine block
Strap to rocker cover (82> models only?)
Earth wire from diagnostic terminal block to battery (>76 models only)
Earth cable from battery to body
Earth strap gearbox LH mount to body
Earth wire from steering rack bracket to body (for horn)
Rosette on back of instrument panel
Rosette on bulkhead near fuse box / steering column bracket
LH front door contact switch (self earthing)
RH front door contact switch (self earthing)
LH rear door contact switch (self earthing, 4-door models)
RH rear door contact switch (self earthing, 4-door models)
Earth wire to interior light bracket
Earth wires to body floor (under rear carpet near bench seat for fuel pump and fuel tank sender)
Earth wire near LH tailgate hinge behind headlining (rear wiper motor)
Earth wire near RH tailgate hinge behind headlining (heated rear window)
Earth wire to rear tailgate slam panel LH side (LH rear lights, number plate lights)
Earth wire to rear tailgate slam panel RH side (RH rear lights, rear washer)



But you have to remember that headlights dip / main beam are switched by the stalk switch ! It could be ?

Cheers ……………