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SteveK



Member Since: 21 Jan 2015
Location: Bromsgrove
Posts: 336
United Kingdom 2002 Defender 110 Td5 HT Rimini Red
Lights coming on when braking
Hi everyone.

Just recently started to get a problem when braking: a relay clicks and the lights come on.


I’ve changed the rear bulbs, but this had no effect.

Switching the lights on causes the brake lights to come on all the time.


Any suggestions anyone.?


Thanks
Post #1077303 11th Oct 2025 9:16pm
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Mo Murphy



Member Since: 01 Jun 2008
Location: Letchworth Garden City, Herts
Posts: 2414
United Kingdom 1984 Defender 90 BMW M57 3.0 Diesel HT Auto Pennine Grey
Most likely an earthing problem. Check and clean your earth points. Add a smear of vaseline on reassembly to keep the water out in the future.
Mo The Land Rover 90 - Many are called, few are chosen.

50 Shades of Pennine Grey
Post #1077315 12th Oct 2025 6:19am
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MarkBrown



Member Since: 03 Oct 2022
Location: Mid Wales
Posts: 595
Wales 1983 Defender 110 Other HT Auto Keswick Green
I had a similar problem with my old TD 110. When braking, the indicators would come on and red lights on the dash would come on dimly. When the indicator was used the brake light would come on. Eventually I figured out that the wires in the loom must have been shorting out ( causing the dash lights to come on dimly ) and sending power to the wrong things. I traced the wires, brakes and flashers, cut them at both ends and ran new ones. Problem solved. I read on here that the wires can rub through where they sit in the chassis.

Another problem on my current 110 was caused by bad connections in the ( new ) tail light units, causing heat, shorting, melted plastic along with fuse blowing when the brake was applied.. These were replaced with Led units, which solved that. I’ve also had several brake light switches, but not since replacing with LEDs. 1983 110 automatic OM606
Post #1077319 12th Oct 2025 8:57am
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