Defender 110 Rear Light Wiring Madness!*

Please can someone help me? My wiring is driving me mad!* I am a complete novice so it may be a simple solution where my inexperience has got the better of me – I certainly hope so J

Ok here is the problem:

When the driving lights are TURNED OFF, upon breaking, the near side the break light illuminates but only through a single filament (the off side light illuminates through both filaments)

When the driving lights are TURNED OFF, the near side light illuminates until I press the break.* While the break is pressed, rather than the second filament turning on the near side light just goes out completely.* Note that under these circumstances, breaking with the driving lights turned on, both filaments in the off side light are illuminated.

I have had the unit replaced and it is wired up as per the instructions.*

Our defender has been modified to be an overland vehicle by the previous owner and when this was done it was given a recreational battery for interior/exterior lighting and 12 volt plugs all over the place so I am assuming that the somewhere along the line, the original wiring has been tinkered with.* *

So in order for me to fix this problem I could really do with some help from someone who might know what is causing these symptoms.

Any help will be gratefully received thanks J

Check your earths as it sounds as though the offside one is earthing through the tail light filament.

That is the main cause for this type of problem.

Hope this helps.

As above, check the earth in each bulb holder. Also check that the bulbs are in correctly. It is possible to put the dual filament bulbs into the worn holders incorrectly causing the lights to work incorrectly.

May be nothing, but are both rear brake/indicator bulbs double filament? I put in a single filament bulb and when I braked with the lights off, the voltage goes back through to the side lights.!

Side/stop light are double filament. The indicators are single filament.

You can tell as the double filament has two silvery bits at the end and thwe single one has one in the middle at the end.