Back Brake Light

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Cyril
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Back Brake Light

Post by Cyril »

Hi
My new brake light has just a red and blue wire.
The old one that I am replacing has a red, black and light purple wire.
How do I connect the new to the old?
I assumed it would be red to red and blue to black leaving the purple redundant?
Many Thanks
Mark[frame]Image[/frame][frame]Image[/frame]
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andy.pointeer
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Re: Back Brake Light

Post by andy.pointeer »

I think you old light would have been a combined rear and brake light that why it had three wires. Look at the bulbs to confirm, the old one would have two connections on the bottom and the new one only one.
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Cyril
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Re: Back Brake Light

Post by Cyril »

Both new and old bulbs have two connectors.
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Cyril
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Re: Back Brake Light

Post by Cyril »

Its ok I have just replaced the rubber, chrome, red reflector dome and kept the original wiring which is working fine :D
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Cyril
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Re: Back Brake Light

Post by Cyril »

Its done now, new cover same old electrics.[frame]Image[/frame]
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bmcecosse
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Re: Back Brake Light

Post by bmcecosse »

Hmm - that is a side/brake light - so will have 3 wires...... Better with the proper Lucas bee-hive lenses really if you can find them.
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mike.perry
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Re: Back Brake Light

Post by mike.perry »

Red - Side/tail, Black - Earth, Other - Brake Light
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Cyril
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Re: Back Brake Light

Post by Cyril »

Hard to find the original Lucas dome. Its better than what was there anyway, some flimsy oversized plastic dome with no rubber seal hanging off by one screw LOL.
As for the electrics in my car, would find more sense in the Bermuda Triangle! Still haven't got my interior light and Horn working :( :o :-?
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andy.pointeer
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Re: Back Brake Light

Post by andy.pointeer »

Good to see the light is now working.

There has been a number of posts about horns and interior lights not working
search for Horn Stopped Working and Wiring interior courtesy light. These may give you a starting point
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bmcecosse
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Re: Back Brake Light

Post by bmcecosse »

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mike.perry
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Re: Back Brake Light

Post by mike.perry »

The clue is the interior light and horn are both on the same fuse
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autolycus
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Re: Back Brake Light

Post by autolycus »

The other common factor between horn and interior lights is that they are both switched on the return (earth) side, unlike anything else on the car. This can be puzzling at first for anyone who isn't aware, and hasn't had a look at the circuit diagram, and these people probably keep fuse makers in business when they fault-find.

Kevin
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Re: Back Brake Light

Post by bmcecosse »

" unlike anything else on the car " - the wipers are also earth switched........
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Cyril
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Re: Back Brake Light

Post by Cyril »

Thanks, got my original Lucas lens and also two new rubber sockets from the David Manners group.
Sorry but I am still non the wiser :o with horn/light.
Lets start with this question
Where is the fuse for horn and interior light?
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mogbob
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Re: Back Brake Light

Post by mogbob »

Assuming a standard loom... main fuse block.
Input/ power is a Brown wire ( from Control box )....... feed to Horn and Interior and Door / Courtesy lights Is a Purple wire.

Put your Multi meter ( 20 volts DC range ) on the Brown wire and a good earth... to establish that 12 volts is getting to the fuse first of all.
Disconnect the battery and then remove the fuse, clean it up with sand paper / emery paper and test it Multi meter on Ohms this time to establish that the fuse is good.Clean the fuse holder clips and remove any rust / dirt.
With 12volts present and a good fuse to these components you will be on the right tracks. Re connect battery and test horn and lights.We'll see how you get on.
Bob
Cyril
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Re: Back Brake Light

Post by Cyril »

Hi
Thursday night 9pm and my car wouldn't start in the works car park. I called RAC and after 30 mins of waiting they informed me I had a flat battery. They jump started it and it got me home.
Put new battery in and low and behold the horn is now working, so is the interior light but the only problem with the light is that I cannot switch it off so I have simply removed the bulb until I can work out why.
Horn is ok :D it now turns "On and Off" at the touch of a switch. :D
Cheers
Mark
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Cyril
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Re: Back Brake Light

Post by Cyril »

Light works but stays on even when car is off.
I removed the bulb.
Is this wired correctly?[frame]Image[/frame]
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drivewasher
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Re: Back Brake Light

Post by drivewasher »

is the metal plate (switch contact) between the brown/black wire & the black wire touchung both if it is thats why lights on.

Cyril
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Re: Back Brake Light

Post by Cyril »

No its stays on even when the slide plate is not touching the brown connection.
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drivewasher
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Re: Back Brake Light

Post by drivewasher »

Then I would look at the door pillar switches. Pull them out and make shure they're not touching earth then check if light goes out.

OR remove the brown/black wire if light goes out it's a door pillar switch or the wire has come off the pillar switch and is touching the body
Last edited by drivewasher on Sat Nov 02, 2013 6:12 pm, edited 1 time in total.

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