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chadjizz

Member Since: 25 Apr 2012
Location: sussex
Posts: 559

2013 Defender 130 Puma 2.2 HCPU Orkney Grey

Electrics - brake lights wont work when lights are on?

morning all

please could i have some advice on this one!

yesterday afternoon i fitted WIPAC LED plug in units to the 90, along with number plate light unit (everything apart from reverse and fog lights).

got to the end, everything worked apart from when side lights or more are on the fog wanted to show on the dash board, press the button for it to turn on and it wouldn't work at all (dash light shone brighter though as if it was on)... i had not touched this! so i thought it might be the wiring on the number plate light so i disconnected it but the fog continued to show!

in a moment of stupidity i put the bullet connectors for the wiring of the number plate the wrong way round......

now i still have the fog issue BUT also the rear brake lights wont work when the lights are on, lights off and they are fine. the number plate light wont work at all and neither will the 3rd brake light in the door... everything else works fine!

i have check every fuse related to lights and they are all fine!
they only thing that doesn't look fine is this 30a big fuse (or should it look like that) -

Click image to enlarge
its a 60 plate 90 xs.

cheers
chad

27th Dec 2014 9:40am

K9F

Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey

Obvious question perhaps....Was it all working before you messed with it? If you have a multimeter check for a voltage either side of the 30 amp fuse.

It is almost certainly an earthing issue.

If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!

27th Dec 2014 10:02am

Fifth Horseman

Member Since: 08 Mar 2011
Location: Lanarkshire
Posts: 322

2011 Defender 110 Puma 2.4 XS CSW Santorini Black

Agree that its most likely an earth fault. It is possible that the symptoms were present but to a lesser degree with filament bulbs fitted to the rear lights.
Has the vehicle had any work done to it that required the transfer box removed?
The first place I would check is the earth connection on the right hand side of the transfer box - see this http://www.defender2.net/forum/topic31859.html thread.

The led number plate may have been killed by connecting it the wrong way round.

27th Dec 2014 1:05pm

munch90

Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

its a fault that's been introduced to it , ok could still be a earth fault but could not have been like it before as a earth fault will some a lot more with filament bulbs due to high load on the earth

my advise would be work backwards and check wiring if that oks ok then refit each old light and test the lights as you go to find where the problem is

you may find its something like in one new light plug the pins are in wrong place etc

yes check that fuse , doesn't look right inside

27th Dec 2014 1:18pm

mk1collector

Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769

Try unplugging the tow bar electrics under the drivers side rear arch

27th Dec 2014 2:25pm

SGH

Member Since: 27 Sep 2010
Location: Hellingly-Sussex
Posts: 1527

Seems that it had been in at dealers for work and they forgot to put earth lead back onto gearbox

I'll name and shame them......Caffyns Land Rover Lewes East Sussex

All sorted.

27th Dec 2014 4:56pm

chadjizz

Member Since: 25 Apr 2012
Location: sussex
Posts: 559

guys thank you for all the reply's. this is why i love this forum.

k9f it was an earthing issue. The main earth was fine. it was the small one on the passenger side.

massive thanks to SGH for the help.

27th Dec 2014 5:49pm

chadjizz

Member Since: 25 Apr 2012
Location: sussex
Posts: 559

the timing of when it came lose and fitting the new LED lights was priceless!!!

27th Dec 2014 5:51pm

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