sorry not been on here much but been very busy getting a mates car ready for a sprint at goodwood tomorrow.
to hopefully answer all the above questions.
1, I too had a brake light fitted inside the window but every time it started to get hot ( i mean sunshine) it fell off and i was getting fed up with trying to find sticky stuff to restick it.
2, The baby walker spoiler is not hollow as i found out when i started to cut the hole out it is full of expanded polyeurothane foam.
3, I did put the wiring through the spoiler by making up a
600mm drill from a peice of
10mm diameter pipe and cutting teeth on one end to drill from the hole for the brake light to the right hand end ( spoiler removed) Checking the length against the spoiler so as not to drill too far and break through the outer skin.(
wear a mask it is pretty nasty stuff)
I then drilled up the end just forward of where the stud comes out until i joined up with the hole from the middle.
Getting the wiring through to theouter end of the spoiler was a pain in the proverbial.
filing out the hole was the tricky bit as it has to be a very presice fit so that took a bit of time.
4, The wiring goes through a hole drilled in the front corner of the original kick tail which is on all BX tailgates just forward of where the stud hole is so all wiring is hidden when the spoiler is refitted.
5, I took the extra precaution of sealing that side with some silicone sealer when i refitted the spoiler.
the wiring is then run up the tailgate with the existing loom and through the rubber tube into the cavity above the head lining, it is then run down to the right hand rear light and connected to the appropriate wires.
If i can i will try and do some drawings to show the full fitting sequence and post them on here.
The size and shape of hole will depend on what the donor brake light is as you will have to strip out the LED parts and the lens from the donor.
You will also need some araldite or other epoxy glue to fit the gubbins into the spoiler.
Regards Kermit
PS Doc we were down your neck of the woods last friday at a place called Mech Motorsport in cheltenham having my mates car maped.
219 bhp and
168 lb/ft of torque from 2.0 litre FIAT twin cam with a 16 valve head and twin
45 webbers fitted in a Morgan plus 4