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Headlight Issue! Where Do I Start?


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#1 Dandyer1995

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Posted 05 July 2018 - 08:24 PM

Hi All,

Got an issue with my headlights.

When I turn the switch to sidelights I get both side lights on plus the left hand full beam.
When I turn the main beam it stays the same but the right hand main beam doesn’t work. (Tried changing the lamp)
If I use the full beam the left hand goes off and the right hand comes on.

The wiring isn’t very good so I wondered if its worth just ordering a new wiring loom for the lights and starting again?

I have a multimeter but not sure what to test first?

Again very new to minis so apologies for lots of questions 😂

#2 cal844

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Posted 05 July 2018 - 08:49 PM

Test voltage at the switch and stalk. Use a multimeter or power probe.

If there is power on the circuits to the light, check the bulb

What year of mini?

Edited by cal844, 05 July 2018 - 08:50 PM.


#3 Dandyer1995

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Posted 05 July 2018 - 08:52 PM

I’ve swapped the lamp with a new one and still nothing, I’ll test it tomorrow with my multimeter.

It’s a 92 Mayfair

#4 Carlos W

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Posted 05 July 2018 - 08:56 PM

Theres a good upgrade loom through wired by Wilson

#5 Bat

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Posted 05 July 2018 - 08:58 PM

Hi,

Sounds like a bad earth, most likely the clump of bullet connections by the bonnet catch.

Cheers  :proud:



#6 Dandyer1995

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Posted 05 July 2018 - 09:10 PM

Thanks, ideally I’d like to just fix it for now as there’s more pressing issues but a upgraded loom is on the list.

I’ll have another play tomorrow night see if I can find it

#7 WiredbyWilson

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Posted 05 July 2018 - 09:33 PM

Make sure someone hasn't connected things wrong / badly by the bonnet catch.

Sidelights - red
Dipped beam - blue/red
Full beam - blue/white
Earth - black.

The sidelights and headlights share a common earth each side that then merges by the bonnet catch and onto the inner wing.

Therefore if the sidelights work both sides its unlikely an earth issue ;-).

Id bet someone's messed about and mixed up the wires.

[email protected]

#8 Dandyer1995

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Posted 06 July 2018 - 06:37 AM

Make sure someone hasn't connected things wrong / badly by the bonnet catch.

Sidelights - red
Dipped beam - blue/red
Full beam - blue/white
Earth - black.

The sidelights and headlights share a common earth each side that then merges by the bonnet catch and onto the inner wing.

Therefore if the sidelights work both sides its unlikely an earth issue ;-).

Id bet someone's messed about and mixed up the wires.

[email protected]

thanks will have a look tonight :D



#9 Icey

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Posted 06 July 2018 - 11:24 AM

Pop the switch out and look at that too. The connectors have a habit of melting. In general, just run through the wires, lights are very simple.

 

Input:

Brown wire to Switch

 

Sidelights:

Switch to Red wire to Fusebox to Red/Green wire to Sidelights, tail lights and dash illumination

 

Main/Dipped is a little more complicated so break it into a few parts:

Switch to Blue wire to Stalk

Stalk to Blue/Red wire to Dipped lights

Stalk to Blue/White wire to Main beam and dash tell-tale

Stalk to Blue wire to Inline Fuse to Blue/Orange wire to Fog light switch to Blue/Yellow wire to Fog light and tell-tale

 

There is also the purple wire into the stalks which allows Main Beam to be used separately (flash) but that's not part of your problem.


Edited by Icey, 06 July 2018 - 11:25 AM.


#10 Dandyer1995

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Posted 06 July 2018 - 03:04 PM

thanks ICEY. that's really helpful. I will take a picture of the mess under dash when I get home ;D






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