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MGB Wiring problem....this should be fun :[

Joe Reed

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Well, I installed my new horns, reinstalled the grill and bumper.......then decided I should check the lights. They worked properly before. Not now. Obviously I disturbed something (or some things) while playing around under the slam panel.

Now when the parking lights are switched on:
-RF parking lamp is bright, LF parking lamp is dim.
-LR is fine, but RR both the turn signal lamp and the brake lamp are lit.

With the headlamps on everything is the same as above - except that the LF headlamp is also dim (RF is fine). Turn signals don't work.

With the lights off, the turn signals work - but the right side is dim (both F & R)

Hazards work fine.

Looks like I'll be pulling the bumper and grille off again to recheck all the connections - especially any grounds. Shoulda checked then before I reinstalled those (although it's only a few minutes to yank them off)...
 

Mickey Richaud

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My money's on ground connections.
 
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Joe Reed

Joe Reed

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Yeah...that's the most likely. It's easy to disturb old wiring and connections when you've got limited access to the area.
 
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Joe Reed

Joe Reed

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Well that was quick and easy! Didn't even have to break out the old multimeter :smile: First thing found was an unplugged ground wire on the left side. That fixed the dim headlamp and parking lamp on that side. Second was a suspect connection at the right front parking lamp. Fixed that and now everything works perfectly!

It always amazes me how a bad connection on one end of the car can create havoc at the lamps on the other end :smile:
 
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