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  1. #1
    Join Date
    Jun 2003
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    East Sussex, UK
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    Wiring the rear lights

    The rear lights have a rubber sleeve that they sit in. Do I have to pass the bare wires through this sleeve before soldering on the brass bullets? Surely this makes the light difficult to remove in the future...

    If someone could also tell me which wires go where, I will be most grateful.


    Robin

    GD427 Euro in progress.
    LS1/T56/P45
    http://www.creffield.com/cobra/index.html
    Reverend Robin
    GD427 Euro

    He who dies with the most tools wins

  2. #2
    Join Date
    May 2004
    Location
    Manchester, Lancs, UK.
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    RE: Wiring the rear lights

    Hi Robin,
    Erm, Yes but it's not so much of a problem.

    What I did was to cut off one of the "nipples" on the rubber boot, then feed the 6mm plastic sleeving through it so hiding the individual wires. See pic:
    http://www.cobraclub.com/crcforum/user_files/4605.jpg

    Note how I put the fog and reverse wires on to a 4-way connector. I did this at the drivers side too, but later moved the connector back to below the boot latch, to be more convenient for the position of the actual lamps. The passenger side connector is unused.
    You might choose to do this differently.

    Wiring colours:
    Red/black or Red/white is tail light (depends which side)
    Green/purple is brake light
    Red/yellow is fog light (note provision for one each side)
    Green/brown is reverse light (note provision for one each side)
    Black is earth in all cases.


    Simon.
    GD427 Euro, 350 Chevy, Tremec 3550
    MSD, Megasquirt Fuel Injection (TBI)

  3. #3
    Join Date
    Jun 2003
    Location
    East Sussex, UK
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    RE: Wiring the rear lights

    Here is an outstandingly basic question:

    What is the best way to solder the brass bullets onto the ends of the wires? Being hollow, the solder tends to run down the bullet. I have been using a small torch but the plastic insulation on the wires keeps melting.

    Robin

    GD427 Euro in progress.
    LS1/T56/P45
    http://www.creffield.com/cobra/index.html
    Reverend Robin
    GD427 Euro

    He who dies with the most tools wins

  4. #4
    Join Date
    May 2003
    Location
    Bridgnorth, Shropshire.
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    2,989

    RE: Wiring the rear lights

    Have you tried a soldering iron - They localise the heat and you won't melt anything

    Steve
    GDEuro/LS6/T56 in progress
    sgullick@waverider.co.uk
    Steve
    DAX 383 ci SBC 440hp...SOLD
    GD Euro mk4, 427 C.I. LS7, 540 hp...SOLD
    Project Tango "Old School" GD, 440 hp LS3 ....SOLD
    460 HP LS Griff "a gentlemens cobra"....SOLD
    630 HP LS7 TVR Tamora

  5. #5
    Join Date
    Jun 2003
    Location
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    RE: Wiring the rear lights

    I'll give it a whirl... just got to stop the solder dripping out of the end...



    Robin

    GD427 Euro in progress.
    LS1/T56/P45
    http://www.creffield.com/cobra/index.html
    Reverend Robin
    GD427 Euro

    He who dies with the most tools wins

  6. #6
    Join Date
    May 2004
    Location
    Manchester, Lancs, UK.
    Posts
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    RE: Wiring the rear lights

    Robin,
    Sorry if I'm teaching you to suck eggs on this one....

    "Tin" the ends of the wires first - the solder will stick better then. Ensure you have flux-cored electrical solder.
    You only need a moderate sized soldering iron, about 25 Watt.
    Just bend the wire a few degrees upwards, then slip the bullet on.
    Apply the soldering iron from underneath, feed the solder in down the "back" of the bullet, where the wire goes in. It will wick up inside the bullet. When it drips out you have more than enough in!
    Remove the soldering iron but do not move the soldered joint for about 20 seconds to ensure the solder has solidified.

    Simon.
    GD427 Euro, 350 Chevy, Tremec 3550
    MSD, Megasquirt Fuel Injection (TBI)

  7. #7
    Join Date
    Jun 2003
    Location
    East Sussex, UK
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    RE: Wiring the rear lights

    I'll try that method - I don't even dare publish how I've been doing it so far.

    A problem:

    For each wire cluster there are 7 wires, including 2 earth (black) wires, to go to more than 7 terminals (there are three lights, each with an earth). Can you confirm that some of the black wires have to be split to go to several sources (if you see what I mean?). The loom instructions don't seem to shed any light on the idea.

    And fitting those damn rubber bits!!! I'm going to get some bolts to fix the lights in with... I hate the cracking noises I'm getting from the self tappers....



    Robin

    GD427 Euro in progress.
    LS1/T56/P45
    http://www.creffield.com/cobra/index.html
    Reverend Robin
    GD427 Euro

    He who dies with the most tools wins

  8. #8
    Join Date
    May 2004
    Location
    Manchester, Lancs, UK.
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    1,015

    RE: Wiring the rear lights

    Trying to think back to what I did.....

    I used one of the earths to go to the fog/reverse lights, then ran the other to the indicator and looped it around to go to the stop/tail lamp. That way there were 3 wires in the sleeving to each lamp unit.

    Where you have the 2 wires on the earth bullet for the indicator, twist them together and tin them before soldering in to the bullet.

    I was a little bothered about the lights sharing earths and didn't want "Ford Escort Mk3 Rear Light Cluster Syndrome".
    In practice, all the earth wires come together in the boot anyway, and go to the front of the loom on one large wire.
    There is negligible effect on one light by the operation of another.

    Handy hint: if you DO ever get this problem, the place to look is on the loom multi-plug just behind the dash where the rear loom connects to the front loom.

    If you are going to use bolts, M3x16 is the size you need.
    I used M3x12 and they were JUST long enough to get the nylock on to the end of the thread.

    Simon.
    GD427 Euro, 350 Chevy, Tremec 3550
    MSD, Megasquirt Fuel Injection (TBI)

  9. #9
    Join Date
    Jun 2003
    Location
    East Sussex, UK
    Posts
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    RE: Wiring the rear lights

    I've ordered a load of M4x25... I'd use M12 if I could...

    I will get hold of some wire from somewhere to do the loop thing - thought that might be what I have to do...


    Robin

    GD427 Euro in progress.
    LS1/T56/P45
    http://www.creffield.com/cobra/index.html
    Reverend Robin
    GD427 Euro

    He who dies with the most tools wins

  10. #10
    Join Date
    Jun 2003
    Location
    East Sussex, UK
    Posts
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    RE: Wiring the rear lights - growing more confused

    I have soldered a loop wire into the earth for the rear indicator, ready to be plugged into the stop/rear light. I notice that there are two live connections on the stop/rear light, as you would expect, and the bulb has a double filament. No problems there.

    How do I know which feed to put into which live connection? The bulb filaments appear to be different thicknesses (I expect the thicker one is for the brake light) but there are no markings showing where to put each feed - is it guesswork or am I missing something?

    Secondly, the fog light has three wires coming out of it... a red, a black, and a green... the red I can cope with, the black I can cope with, but not sure about the green... any pointers?



    Robin

    GD427 Euro in progress.
    LS1/T56/P45
    http://www.creffield.com/cobra/index.html
    Reverend Robin
    GD427 Euro

    He who dies with the most tools wins

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