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Scratching my head - Headlamp issue.
Posted: Sat Sep 08, 2012 5:50 am
by ProofNZ
I am a little confused on this one - it must be something simple - but beyond me.
Low beam on the drivers headlight doesn't go.
Other side is fine, both side high beam is fine.
Replaced lamp - still not going.
Got the multimeter out - shows 12volts where it should. Tried 2 different lamps on it.
The only thing I can think, is that at some point when I have had the dash out - I have accidentally shifted around the cabling at the back of the switch - but if that was the case - why is the passenger side going?
I am a little lost - any ideas - directions to look?
Many thanks.
Re: Scratching my head - Headlamp issue.
Posted: Sat Sep 08, 2012 10:30 am
by Geoff
The wire carrying current to your dipped beams has to split somewhere near the front of the engine bay between the two lamps - find the connector block and check the connections there.
Re: Scratching my head - Headlamp issue.
Posted: Sat Sep 08, 2012 8:20 pm
by ProofNZ
To clarify - I have measured 12volts at the connector - I will check anyway though - becase I realise that 12 volts but no light doesnt make a lot of sense.
Re: Scratching my head - Headlamp issue.
Posted: Mon Sep 10, 2012 9:13 pm
by hans
Try it with the bulb from the working side so you are sure the lamp is correct.
Re: Scratching my head - Headlamp issue.
Posted: Tue Sep 11, 2012 8:22 am
by Mrs Bingham
Volt drop on the supply cable caused most likely by a dodgy connector block. Unlikely to be the earth as the main beam works ok. Despite low beam voltage being present once a significant load is applied it is enough to cause the problem. Mulitimeters have a habbit of missing this point as they don't load the circuit
Chances are the connector block on the inner wing is the issue.
Re: Scratching my head - Headlamp issue.
Posted: Tue Sep 11, 2012 11:03 pm
by ProofNZ
hans wrote:Try it with the bulb from the working side so you are sure the lamp is correct.
Tried a second lamp with the same issue.
Mrs Bingham wrote:Volt drop on the supply cable caused most likely by a dodgy connector block. Unlikely to be the earth as the main beam works ok. Despite low beam voltage being present once a significant load is applied it is enough to cause the problem. Mulitimeters have a habbit of missing this point as they don't load the circuit
Chances are the connector block on the inner wing is the issue.
Exactly the type of suggestion I was after, and something I wouldn't have figured out myself. Many thanks!
Re: Scratching my head - Headlamp issue.
Posted: Sat Sep 15, 2012 8:06 am
by ProofNZ
Had a much around with the connections in the engine bay today - and viola - lamps back on.
Will replace the connections.
Many thanks!