How to fit the facelift clear rear lights to a pre-facelift car (with the red lights).
1) Remove your original lights and bulb holders.
2) Before cutting any wires look at the loom at comes with the new lights, there are 4 wires and the original car has 5. You should see a wire running from the orange bulb holder to the white one on the new loom, this is the earth wire to the white holder, cut this wire closer to the orange one.
3) Cut the original indicator plug off the car’s loom (2 wires).
4) Cut the remaining wires to the orange holder, make sure they are cut to a different length to the one cut in number 2 (this way you know which wire is the common earth).
5) Using a multi meter on continuity find the other earth wire, connect this to the black wire on the car’s original loom.
6) Connect the other wire (cut in no 4) to the other wire from the car’s loom.
7) Check the indicator works (make sure all wiring joints are insulated).
8 ) You will notice you have a “spare” earth wire that used to go to the tail light holder – cut in 2). You can use this it to provide an earth if you fit LEDS in the indicator part of the light, if not insulate its end (see separate guide).
9) Cut the black wire on the cars tail light loom and connect it to the earth wire.
10) The remaining two wires on the car’s loom are the brake and tail light feed, as looms may vary you will need to check which is which using your multi meter.
11) Connect them to the remaining 2 wires on the new loom and test that your bulb lights with a single dim element for tail light and a bright one for the brakes). Once you have them correct insulate all joins. Remember the wire for the tail light as you’ll need to use it if you fit the LEDs in the indicator part of the light.
How to fit LEDs in to the indicator light (to replicate the facelift ST and RS lights)
1) You’ll need to buy some LEDs on strips like these and wire them (+&-) as shown, use thin wire, speaker cable is too thick and not pliable enough, make the negative wire shorter so you know which is which.
I’d recommend 3 LEDs no more otherwise the indicator will not be visible enough.
2) Drill a small hole under where the indicator bulb holder fits and remove an debris that gets in to the light.
Feed the wires through from the inside.
3) Tuck the LEDs inside the light vertically down from the indicator bulb, once happy with the fit take off the sticky paper and stick down (trial fitting allows you to bend the wire in to shape first, you’ll need to pull the LED strip out before taking off the stick backing paper).
4) Connect the negative wire to the spare earth wire on the indicator bulb holder (point 8 in the light fitting guide above).
5) Connect the positive wire to the tail light wire on the tail light bulb holder (point 11 in the light fitting guide above).
6) Turn your rear lights on and the LEDs also light up, they remain illuminated with the indicators too, as so the Ford lights on the facelift ST and RS.
Ensure that all wiring connectors are fully insulated and be careful when you test connections.
Don’t cut, test or connect wires with the lights turned on.
Use a multi meter, don’t mix up earth and power wires.
When you cut the plugs off the car’s loom leave enough wire on them to reconnect them if you want to refit the original lights.
Make sure all wires are tidy when you refit the lights to avoid nipping a wire by accident.
By following these guides you take responsibility for the correct and safe modification of the car and your personal safety. You also take responsibility for the legality of the modification, saying someone told you to is no excuse in the eyes of the law.