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MG MGB Technical - LIGHTS GO OUT WHEN ON FULL BEAM

hope someone can help. Just bought a 1966 mgb gt. Im not to hot on the tech side. I cant understand why i push the main beam switch with my foot the lights go off.Any ideas or am i being thick!.tony
TONY

Hi Tony.

There is a bullet connector at the front of the car that splits the blue / white wire from the dip switch to a blue / white to each headlamp, this connector sometimes gives trouble.

Does your blue main beam warning light come on ?.

Don
Don

hi don, the blue light does go on and off.
tony

Hi again.

It sounds like the connector, assuming that both main beam filaments haven't blown.

Don
Don

Tony,

Make sure the wires on the foot dip switch have not been knocked off. It's easy to kick them loose and, easy to fix! Good luck.

Paul
Paul Hanley

Tony,

Could also be the contacts in the foot switch. To test just pull the wires away from the foot switch (3) Use a short jumper wire with male spade terminals at either end and jumper from the "hot" lead into the other two (high and low beams). If the problem is in the switch you will have bypassed it...if the problem is elsewhere it will persist.

Cliff
Cliff Maddox

Had exactly the same problem, switch to high beam and although the dash indicator comes on, the lights don't. In behind the dash, floating nowhere in particular in the loom is a bullet connector that connects your headlight main beam wire. This connector is in the middle of the wire and has come apart.
In my case this conection was roughly in the space behind the speedo, but as mine is a RHD to LHD conversion this might be elsewhere for you.
Peter

thanks everyone for your help.tony
tony

Tony,
So how did it work out?! Problem fixed?
Robert Dougherty

Had no time to look yet.Quicking checked connections on foot switch they seem fine. I will have good look at the weekend. thanks for your interest
tony

just had a quick look.Problem solved. as suggested by Don problem traced to rusty conection on a bullet connector where the wiring splits at the front of the car for the two lights.
Thanks again guys
tony

This thread was discussed between 15/03/2004 and 16/03/2004

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