Technical headscratchin headlamp problem.

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Technical headscratchin headlamp problem.

Joined
Nov 18, 2005
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Guildford, Surrey
Hey.

Noticed Friday night that when I put my dipped beams on, that it seems to be spliting the power into the main beam on both sides.
The problem appears to be coming from the drivers side as the passenger side is working just fine. Rather annoyingly, when you turn the lights off they stay on (permanently live). On the dash, the main beam warning light is very faint. Checked all the fuses and they are OK. Could it be a sticky relay, or the classic switch problem i've read about?
I've attached a picture, but it doesn't show it that well...

Any help would be appreciated!
 

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My first guess is that your ground has failed on the right unit, it is grounding itself via the main beam trough the main beam power wires, in which the indicator is one part thats connected to ground.
You could take a piece of wire and touch it on the reflector ground and somewhere on body, if it works with that, its grounding on the cluster.

If switch had failed it should affect both sides. And as sidelight has its own groundwire, it is not affected.
 
ok I tried your remedy and it worked. I also took the whole unit out and tried it on the passenger side too and it worked, so i'm assuming the cluster is ok? I'm thinking that there is a problem with the earth maybe, but I couldnt see any immediate breaks or split in the cable bundle that goes to the earth point underneath the lamp.
Any more help would be great as i'm not that grand with electrics lol.
 
Check with multimeter the ground works at the plug (0 resistance beween reflector and groundpin on plug. Do same on the connector and body.
If its the plug ground, just cut the wire near connector and check the part you left is good, then just rewire it to ground.
If it is the wires inside the unit, remove the connectors from bulbs and relectors, the pry the connector part with flathead screwdriver and it should pop out. Replace broken wires/connectors (solder is good) and pop it back.
The plug has a rubber ring between the housing and plug so dont abuse it too much with the screwdriver.

Quick way is just to drill a hole and attach wire to reflector and then screw it to body ground, if you do this, put some silicone on the hole to seal it.
 
All seems to be sorted guys! The problem was the ground on the front drivers side being completely knackered and old. I undone the bolt, and as I was doing so every single earth wire came out the end of the metal connector! :bang:
Just a task of filing out all the crap, stripping down the wires, soldering them back in and fixing them in to so they dont come out. Rubbed down the bodywork amd GND point, put some copper grease on them both and fixed it all back together. All electrics working in harmony again!!! :D
Took about an hour to do.
 
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