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Wales
by Joske Vermeule, September 1
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Forums39
Topics49,861
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Most Online1,063 Jun 14th, 2026
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Joined: May 2021
Posts: 44
Just Getting Started
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OP
Just Getting Started
Joined: May 2021
Posts: 44 |
Can anyone advise under which wing will I find existing wires for spotlights- will they be wrapped in the loom? Many thanks
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Joined: Feb 2016
Posts: 8,675 Likes: 411
Needs to Get Out More!
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Needs to Get Out More!
Joined: Feb 2016
Posts: 8,675 Likes: 411 |
You haven't said what year/model but recent Classics have blue/yellow cables tucked away under each front wing with connector to optional switch behind dash. This switch takes its feed from BCU if your car has one, which inhibits power to lamps unless headlights are on.
Ground connection for lamps you can pick up locally. Look for or provide double female bullet connector fed by black wire.
Note there may be two blue/yellow cables under r/h wing one providing power and the other looping across to l/h hand side. The wiring diagram suggests these two need to be joined together, typically with double female bullet so you have power to both sides. This may have already been done by factory.
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone
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Joined: May 2021
Posts: 44
Just Getting Started
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OP
Just Getting Started
Joined: May 2021
Posts: 44 |
Thanks Richard it’s a 2005 Plus4 and I want them to come on with the main beam. Will the blue and yellow wires be on their own or wrapped within the harness? Thank you
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Joined: Feb 2016
Posts: 8,675 Likes: 411
Needs to Get Out More!
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Needs to Get Out More!
Joined: Feb 2016
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Separate as they emerge from the loom and adjacent to headlamp cabling Gilberto. Take off front wheels and you should see cables tied to inner wings once you have rinsed off dirt. There may be other unused cables such as those for optional wing top side lamps.
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone
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Joined: May 2021
Posts: 44
Just Getting Started
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OP
Just Getting Started
Joined: May 2021
Posts: 44 |
Many thanks Richard will investigate as I have sidelights. You have been really helpful!
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Joined: Jul 2007
Posts: 40
Just Getting Started
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Just Getting Started
Joined: Jul 2007
Posts: 40 |
did mine with a relay under the dash, no need to furtle at the wings. Spots only come on with main beam. I think I ran a wire from the main beam feed to the relay to activate the switch, turning off the spotlight switch kills the spots. So spots only on with main beam and don't have to have them on.
G Walker 1983 +8, 1933 singer 9 2022 MG ZS (electric)
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Joined: Feb 2016
Posts: 8,675 Likes: 411
Needs to Get Out More!
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Needs to Get Out More!
Joined: Feb 2016
Posts: 8,675 Likes: 411 |
Yes I agree a relay would be needed for spot lamps. In fairness MMC provide the otherwise redundant wiring from switch cabling behind dash to under wings as mentioned, but for front fog lights! The power supply appears to be taken from sidelight switch therefore.
A shame not to use this existing cabling though and just add a relay close to r/h side headlamp where supply and trigger can be readily found.
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone
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