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Mustang Eurostyle Taillight Installation

 

Page 3

8.  This step requires a lot of wiring.  First of all, reconnect your battery for a second and turn on your turn signal for whichever side you are working on at the time.  Check which of the two brake lights is blinking, the other one won't blink because you cut off the feed and wired it with the center brake light.  Once you figure out which one still works, disconnect the battery.   Then, cut the light that works off, leaving enough wire to work with(around three to four inches from the light assembly.  After you cut the light off, remove some of the insulation from each of the wires, to expose the copper, around 3/4 inch worth. 
    Take the two (of four)  light assemblies that your new taillights came with (one with a major and ground wire, and the other with a major, minor, and ground wire), then remove around 3/4 inch of the insulation to expose the copper wires, like you did with the wire coming out of the tailgate that you cut in half.    Now, splice the major wire on the two new taillight assemblies with the green/orange feed wire coming out of the tailgate.  Then splice the ground wire on the two new taillights assemblies with the black wire coming out of the tailgate.    After that, cap off the brown wire that is connected to one of the two new taillight assemblies and the brown wire coming out of the taillgate to prevent arching, you won't need this (minor) feed anymore, which powered the dim mode of the taillights when you  turn on your headlights- the sole purpose of these two newly wired lights are just to work the turnsignal.   
    After that, cut the other brake light off and remove 3/4 inch of the insulation to expose the copper wire on the wires coming out of the tailgate, the wire on the brake light assembly you just cut off, and the other brake light assembly wires you cut off earlier. Then, splice the major wire on the two brake light assemblies with the green/orange brake feed wire coming out of the tailgate.  Splice the minor wire on the two brake light assemblies with the brown wire coming out of the tailgate.  Then splice the ground wire on the two brake light assemblies with the black ground wire coming out of the tailgate.
    After doing that, repeat for the other taillight assembly, after reconnecting the battery again for a second and finding out which brake light still blinks.  I hope you all got that.

Old dangling lights

All wired

Before (4 lights)

After (6 lights)

 

9.  This step is a bit easier than the last.  After all the lights are wired, now all you need to do is twist the lights back on to the taillight assembly.  Making sure your are putting the correct wire in the correct hole.   It isn't to hard to tell which light goes where.  Just reconnect your battery and activate the different lights.  When you turn on the turn signal you will have two lights blinking since you did wire two lights to it.  You will only be using one of the lights though.  The reason for the second is to add resistance (I believe).   If you don't and turn on the turnsignal.

Extra light bulb

it will blink twice as fast from normal while the hazards will flash normal.  With the second turnsignal wired together it will blink at normal rate again.  All you do with the second light is stuff it behind the taillight assembly when reattaching it to the body.  The only problem is that at night, when you turn on the turnsignal you can see the light blinking through at the bottom of the assembly, so all I did was wrap black electrical tape around the light and haven't had a problem since.


10.  After you twist on all the lights all you have to do is put the assembly back onto the body, tighten the bolts back down, and put the trunk lining back in place.   At this point you are almost there.  The turnsignal will now flash amber only, along with the hazards.  The only problem now is that when you hit the brakes, your amber light will also turn on, but how I wired everything you have only one last thing to do.


11.  You will need to access wires that are located at the left of the drivers well, where you rest your left foot.  Pull   up the long plastic cover that runs the length of the door opening, this covers the wiring harness that goes to the back of the car.  Remove the plastic cover by the door hinge.  This point is where most of the wiring harnesses merge.  After removing the plastic cover use a Torx T15 screwdriver to remove the bracket that holds a brown/black cube shaped object that has lots of wired going into the Top and coming out of the bottom.  This is were the brake and turn signal are merged.

Pull out


12.  Again, the picture pretty much explains it all.   Anyway, at the bottom of the cube, where the wires come out again, there are two red wires with green stripes, one for the main brake lights and the other for the center brake light.  You want to cut the one on the left (inside) side of the cube, then cap the two ends off, you wont need this brake light feed anymore, since the light will now only act as a turnsignal. 

Cut feed

Beware, if you cut the wrong one, you have just cut off ALL of your brake lights, and your turnsignal light will still turn on when you brake.   If you happen to have done this, all you have to do is lengthen the wire like you did earlier at the center brake light harness, then splice the two ends back together.   I know what I am talking about because I was the guinea pig and it happened to me.   Then once it is reconnected you know which is the correct one (the other) and just cut that one and cap the two ends like you would have done before if you did it correctly.


13.  Once you are done with that, just put everything back in place, opposite the way you took it all out.  You are now finished, at least you should be, and it should look like this.......

Finished product


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