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Gal Dove

Member Since: 22 Jan 2022
Location: South Wales
Posts: 71

2014 Defender 110 Puma 2.2 USW Corris Grey

Side lights coming on brake depressed

Hi everyone.

Really hoping that I can get some help with this issue.
2014 110 Utility, 24k miles, very well maintained & looked after.

My side lights have started illuminating when I press the brake pedal. The green side light indicator light on the dashboard, plus the back lighting for the clocks on the dashboard all come on when the brake is pressed, and extinguish when I release the brake. This seems to be intermittent and it doesn't happen every time I press the brake. I naturally assumed that one of the light fittings (most likely one of the brake light fittings) would be full of water - but unfortunately not.

The car has the original light fittings - not LED. I've removed all of the lights and inspected them - paying particular attention to the brake lights. There appears to be some slight deformation in the plastic of the brake light bulb holder on the N/S due to heat. I was able to remove the bulb (which is working) but the plastic bulb seating is slightly melted, making it difficult to remove the bulb. There is also some very slight burning around one of the (male) electric connections at the back of the light housing.

The only recent changes I've made are that I've recently started towing a trailer - so I've been using the electric hook-up for that, and I've had to replace one of the front side light bulbs.

I've inspected the wiring loom as best I can as it rises to the rear lighting clusters and all of the wires appear to be sound with no signs of degrading or tears, etc.

I've owned the car for five years now and have considered converting over to the LED's (as I have with my 90) but I've not had any major issues with these and would like to keep it stock, if possible.

I'd be very grateful for any help.

7th Nov 2023 11:48am

LR Nuts

Member Since: 10 Aug 2022
Location: UK
Posts: 1140

check the earth wire.

7th Nov 2023 11:50am

Gal Dove

Member Since: 22 Jan 2022
Location: South Wales
Posts: 71

Thanks. Can you point me at that?

7th Nov 2023 11:55am

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6610

2015 Defender 90 Puma 2.2 XS CSW Montalcino Red

I think you've probably found the problem in the NS stop/tail bulb holder.

Likely this is shorting between brake and side. Part number to replace this is XBP100190.

Also change the bulb in this side anyway, it may be faulty and the cause of the overheat.

1988 90 Td5 NAS soft top

2015 D90 XS SW

7th Nov 2023 12:36pm

Linds Hanson

Member Since: 16 Jan 2021
Location: Cornwall
Posts: 486

Incorrect bulb or bulb not fitted correctlt shorting the stop and tail contacts togeather.

7th Nov 2023 12:48pm

Gal Dove

Member Since: 22 Jan 2022
Location: South Wales
Posts: 71

Thanks to all for your help and advice - it looks like the issue might have been caused by one of the two stop and tail bulbs. I changed both of them for new ones and the issue seems to have been resolved. It's early days but fingers crossed!

Thanks again - I'll update this if there are any further issues.

8th Nov 2023 8:27pm

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