Jump to content


Photo
- - - - -

Main Beam Wiring

electrical

  • Please log in to reply
1 reply to this topic

#1 konrod

konrod

    Just On Tickover

  • Noobies
  • Pip
  • 6 posts
  • Location: Huntingdon

Posted 29 June 2016 - 12:58 PM

Hi all, I hope someone can help me with this little poser.

 

I've recently bought a 1989 Mini 30 anniversary model.  It had a number of issues I'm working through but the one I'm struggling with is main beam on the headlights (which I'm embarrassed as having to ask about).

 

The headlights work OK on side and dip beam, although the units themselves are aftermarket and have the side lights as a ring around the outside.  The main bulb is a H4.  The column switch works OK, in that when I flash the dip beam remain on, when I put main beam on they turn off.  I have 12V into the switch on the purple wire (and Brown/green), and 12V appears on the heavy duty Blue/white.  So far so good.

 

On removing the offside headlight there is a piece of "chocolate block" where the wiring has been adapted for the new headlight (to supply to the sidelight ring) but the 12V isn't appearing here.  So somewhere I have a break.

 

My question is about how the loom is set up and where it runs.  Firstly, is there a joint where the single blue/white becomes two, and if so, where physically in the loom is that joint, or does the wiring run into one headlight and then to the other.

 

I have the wiring diagram in the Haynes manual which indicates it's a joint, but is otherwise pretty useless.

 

The other point is that there are four holes in the horizontal panel behind/above the front bumper.  I'm assuming it may have had spot lamps, in which case the main beam may have been diverted.  Does anyone know where the spot lamp wiring usually breaks into the main lighting circuits - I assume it needs a relay with a heavy duty switched live, so wouldn't necessarily be done behind the headlamp unit.

 

Thanks in advance for your help.

 

 



#2 CityEPete

CityEPete

    Up Into Fourth

  • Members
  • PipPipPipPipPipPipPipPipPip
  • 3,920 posts
  • Location: On my soapbox....

Posted 29 June 2016 - 04:55 PM

There is normally a clump of connectors behind the grill where everything joins these give lots of problems.

The flash and regular high beams are from different feeds but who knows what might have been done where. On paper its the stalk if you have dip and flash but no regular main beam.





Also tagged with one or more of these keywords: electrical

1 user(s) are reading this topic

0 members, 1 guests, 0 anonymous users