Jayridium
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- Pedronapper (Peterhead)
So, I've just finished this little project, I had the headlining down to wire in a new roof mounted amplified antenna in the original position, so took the opportunity to run some more wiring tothe front of the headlining between the sun roofs and the top of the windscreen for additional forward lighting in the cabin. This wiring is connected to the original Central courtesy lamp wiring and runs along the centre of the roof, to the top of the right hand B pillar, then along the top of the right hand door frame. The original wiring runs down the Right hand A pillar, and goes behind the dashboard, my new wiring turns left and continues along the underside of the roof then aloing the thin section between the sunroofs and windscreen.
On the courtesy lamps there are two wires, the Courtesy lamp earths through its body, the Purple wire is a constant live, and the Purple and White wire is a switched live controlled by the CCU. The switches this purple / white to earth when the door switch activates, and the CCU pulses this line using PWM to do the dimming of the courtesy lights. By variating the voltage on thepurple/white lines the CCU creates a potential difference across the purple and purple/white lines, its this differing, reducing, voltage that dims the brightness of the courtesy light. The voltages re modulated something like this:
So I started with dropping the headlining, and cutting chunks out of it to allow the new lamp assembly room to go into it, I also cut some of the clips off the back of the lamp to save me having to cut slots in the headlining for them. Eventually the fitted into each other:
After that I fitted a couple of rivnuts to the headlining to secure the lamp to, and I noticed a problem, the original "sunglasses pocket" was going to interfere with the lamp:
Cue some "plastic surgery" with a hack saw:
And the little Aluminium plate on the left was cut to the profile of the pocket with aviation snips.
This was then quickly wrapped in carbon vinyl & bonded to the back of the "pocket":
So those parts are now ready for reassembly, but I'm not done yet...
On the courtesy lamps there are two wires, the Courtesy lamp earths through its body, the Purple wire is a constant live, and the Purple and White wire is a switched live controlled by the CCU. The switches this purple / white to earth when the door switch activates, and the CCU pulses this line using PWM to do the dimming of the courtesy lights. By variating the voltage on thepurple/white lines the CCU creates a potential difference across the purple and purple/white lines, its this differing, reducing, voltage that dims the brightness of the courtesy light. The voltages re modulated something like this:
So I started with dropping the headlining, and cutting chunks out of it to allow the new lamp assembly room to go into it, I also cut some of the clips off the back of the lamp to save me having to cut slots in the headlining for them. Eventually the fitted into each other:
After that I fitted a couple of rivnuts to the headlining to secure the lamp to, and I noticed a problem, the original "sunglasses pocket" was going to interfere with the lamp:
Cue some "plastic surgery" with a hack saw:
And the little Aluminium plate on the left was cut to the profile of the pocket with aviation snips.
This was then quickly wrapped in carbon vinyl & bonded to the back of the "pocket":
So those parts are now ready for reassembly, but I'm not done yet...