One last--I've got a set of Holden Statesman door panels which have a small lamp at the bottom to illuminate ground when a door is open, but there's no harness included, and PPV will have nothing in the doors to supply power for this. Could you research and figure out how it could be done?
Please send a pic of the lamp in the door panel, I am in the middle of doing this mod with aftermarket lights so I would like to see how close I got! Was not even aware the AU cars got them. I saw the cut out for them in our caprice panels so I came up with my own solution.
So to get power into the doors for these I believe there is 2 ways, well maybe even more but here is what I came up with.
The proper way. On he BCM there is a connection called "puddle Lamps" I am not sure if that is for the lamps on the underside of the mirrors of the ones at the bottom of the door panels. The difference between these comes down to as you approach the car and unlock your vehicle you would want the mirror lights to come on but you would not really care if the door panel ones came on since the door is shut anyway. I figure the door latch provides them the ground to light them when the door is open but not sure how they get their power, maybe they share the puddle lamps voltage with the mirror, maybe it is a second source of voltage from the courtesy lamps circuits. Just not sure could not find a diagram for this option since it did not come with the PPV.
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What goes along with this proper solution of course would be that the BCM may need to get programmed to activate the puddle light circuit (if it can be done at all, have not checked with Chris White on that)
PPV limitation on this is that the door harness plug on front doors only has 2 spots available to add new circuits. Ground all time and Ground when door open is already in there if you need to tap into them. Just have to get a positive 12 volts in there for the lights. We have a few circuits to choose from for that.
My way. Not wanting to deal with the BCM I opted to get 12 volts from the courtesy light circuit that is positive when you press the unlock button on your remote and fades out when you start the car, but will energize again if you open the door or press the dome light button. In our cars this is the "Blue Wire" courtesy lamp circuit. The other courtesy lamp circuit is the "orange wire" and it is positive 12 volts all the time but turns off after 20 minutes of car inactivity. To make things confusing there is another 12 volt courtesy lamp circuit that never shuts off and it also uses the orange wires. I believe the Lighted sun-visors use these which is stupid but I digress.
So I sent the blue wire into the doors for 12 volt positive and I used the Brown wire with white stripe coming from the door latch assembly to provide ground to the door lights when the door was open. THis way when the door is closed and you turn your dome light on the doors wont light up, although it's not that bad if that did happen, provide a little but of light at the side of the seats in case you dropped something. In that case you would just use the all the time ground in the door to provide a ground to the door lights. One little flaw I found with this set up: The drivers door ground when open is a separate signal from all the other doors that all share a ground (for the RAP feature I suppose). So if you open any other door besides the drivers door all the other door courtesy lights light up even if the other doors are shut. I am sure there is a way to defeat it with some diodes but not a big enough of a deal to worry about.
Grabbing the blue wire circuit proved to be a challenge. The only place that circuit runs on our stripped down PPV is up to the headliner to our dome light assembly. It comes out of the BCM but Not much room to work down there. I tapped into it where it runs up the A pillar and sent it down into the top of the dash to make it's way around to the doors (and also added courtesey lights to my kick panels)
I plan to write up a post with terminal part numbers and such, but it is so complicated I think a video might be an easier undertaking.
Here is some pics of one of them mounted and the hole needed to be cut. Yiy can see the outline that is already in our door panels.

Lamp assembly info the same as in this thread: Adding Glove Compartment Courtesy Lights


