LED front headlamps high beam on dip ??

Deano1976! · Jul 15, 2023

Help (again).. inherited a Defender with halo LED front headlamps however the wiring appears to be back to front as main beam is on the first dip switch position and then low beam is on the second main switch position.

The connectors are plug and play in the back of the lamps so the problem should be at the switch end and I can’t understand how this can have happened (except it does have a roof mounted light bar tapped into the high beam)…

Anyone have any similar problems please ??

tottot · Jul 15, 2023

So starting on main beam, then low beam, then main flash in that order?

mystery · Jul 15, 2023

what year ,does it have the dim/dip relay and has that been linked out by the PO

300bhp/ton · Jul 15, 2023

Doubt the switch is wired in wrong, not impossible of course, but would be much harder to accomplish. Much more likely the headlight units. Many LED lights are cheap nasty things that aren't actually legal. Even if someone paid a fortune for them. So they made not be plug & play at all.

miktdish · Jul 15, 2023

Deano1976! said:
Help (again).. inherited a Defender with halo LED front headlamps

What type of Defender 19j, 200, 300, TD5, 2.2, 2,4 ?
What year was it first registered ?

Deano1976! said:
I can’t understand how this can have happened (except it does have a roof mounted light bar tapped into the high beam)…

How is the roof light 'tapped in' ?

Deano1976! · Jul 15, 2023

tottot said:
So starting on main beam, then low beam, then main flash in that order?

first position forward is main beam, then second position is side lights (halo) - so when you then push forward the main beam stalk it comes on directly from side lights rather than main beam...

Deano1976! · Jul 15, 2023

mystery said:
what year ,does it have the dim/dip relay and has that been linked out by the PO

its a 2000 td5 and I'm struggling to find a wiring diagram the same on line - is one of these the dim/dip do you know ?

Deano1976! · Jul 15, 2023

300bhp/ton said:
Doubt the switch is wired in wrong, not impossible of course, but would be much harder to accomplish. Much more likely the headlight units. Many LED lights are cheap nasty things that aren't actually legal. Even if someone paid a fortune for them. So they made not be plug & play at all.

bugger, thanks - nothing ever straightforward eh..

Deano1976! · Jul 15, 2023

miktdish said:
What type of Defender 19j, 200, 300, TD5, 2.2, 2,4 ?
What year was it first registered ?

How is the roof light 'tapped in' ?

hi, its a 2000 td5. The roof bar is tapped into the switch wire off the switch - struggling to work out if its right or wrong..

Deano1976! · Jul 15, 2023

mystery said:
what year ,does it have the dim/dip relay and has that been linked out by the PO

Yes it’s got the relay

miktdish · Jul 15, 2023

Deano1976! said:
its a 2000 td5 and I'm struggling to find a wiring diagram the same on line - is one of these the dim/dip do you know ?View attachment 292968

No. The dim/dip relay is pink and is behind the speedo on the right.

tottot · Jul 15, 2023

Deano1976! said:
first position forward is main beam, then second position is side lights (halo) - so when you then push forward the main beam stalk it comes on directly from side lights rather than main beam...

Right, so it is the on off switch we are talking about not the stalk.
Off is towards steering wheel, middle is side lamps only and forward is side and headlamps. So yours is wired wrong.

miktdish · Jul 15, 2023

Deano1976! said:
hi, its a 2000 td5. The roof bar is tapped into the switch wire off the switch - struggling to work out if its right or wrong..

Thats not really right.
There are a number of reasons.

The switch carries all the current of the lights, adding more current can overload the switch and it fails/starts doing odd things.

The light switch.
The small one on the left of the steering column.
As @tottot says it has three positions,
All the way up is off
1 click down is side lights.
2nd click down is side and headlights (only when the ignition is on).

On the back of the switch are 3 connections and 3 wires.
Brown, Red and Blue

Brown is always live (12V)
Red becomes live on the first click and turn on the side lights.
Blue becomes live on the second click. When the ignition is on this blue cable energised the 3rd (middle) yellow relay on the fuse board and send a voltage to the stalk on the right side of the steering wheel.
Depending on the position of that switch (up towards the driver or down) the headlights come on, either dipped or high
beam.

The red fuses above the brown relay in your pic are for the dipped and mainbeam headlamp bulbs.
If you open the bonnet. Looking at the engine with the heater on the right, on the side of the heater are two grey connectors, the big one has the wires for the lights and indicators on the nearside, the offsife connector is opposite by the brake pedal box.
The bhlack wires on that connector are earth.
The switches send 12 volts to the lamps.
You can chase all of these voltages around using a voltmeter and you should be able to find the 'fault'.

mystery · Jul 15, 2023

which switch ,and the relay in your pict is wiper relay.
any images of switch in question and image of the headlight connections

Deano1976! · Jul 24, 2023

Update - upon test the larger indicator/high beam stalk switch was all over the place with lots of play and those worn ****ty contacts and I was not happy with how the roof bar was wired. Having now fitted a new stalk switch and removed the high beam wires and its working perfectly !! Thank you all.. Just now not sure whether or how to connect the roof bar back in properly...

miktdish · Jul 24, 2023

Deano1976! said:
Thank you all.. Just now not sure whether or how to connect the roof bar back in properly...

You use a relay ... standard 4 pin, with fuse and bas ....
Like this one ...

Pardon our interruption...

Connect P85 to ground, P86 to the 12V source that switches on the light bar.
P30 from the AUX feed and P87 to the '+' on the lightbar

Change the fuse to 15A or 10A if you lightbar is LED

KISSMYAURA · Jul 24, 2023

tottot said:
Right, so it is the on off switch we are talking about not the stalk.
Off is towards steering wheel, middle is side lamps only and forward is side and headlamps. So yours is wired wrong.

Yer switch is wired wrong, sounds like Johnny Crimpset has been in there!

KISSMYAURA · Jul 24, 2023

miktdish said:
You use a relay ... standard 4 pin, with fuse and bas ....
Like this one ...

Pardon our interruption...

Connect P85 to ground, P86 to the 12V source that switches on the light bar.
P30 from the AUX feed and P87 to the '+' on the lightbar

Change the fuse to 15A or 10A if you lightbar is LED

What @miktdish said..... REEEEELAY, you can either activate via seperate switch of hive control feed from main beam....

miktdish · Jul 24, 2023

KISSMYAURA said:
What @miktdish said..... REEEEELAY, you can either activate via seperate switch of hive control feed from main beam....

I use a live feed from my main beam through a switch, which I turn off (so the lights don't work), when i go for the MOT

LED front headlamps high beam on dip ??

Member

Well-Known Member

Well-Known Member

Well-Known Member

Guns n Chainsaws

Member

Member

Member

Member

Member

Attachments

Guns n Chainsaws

Well-Known Member

Guns n Chainsaws

Well-Known Member

Attachments

Member

Guns n Chainsaws

Well-Known Member

Well-Known Member

Guns n Chainsaws

Similar threads