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The only way of how to get the door sill to light up when the doors are open, is to get electric current to the sills or the plugs.
You will have to tap into the system, and lay a new set of wires to the sill plates or to the plugs at the doors itself.
It is quite tricky, but I can supply you with some instrcutions of the best "do it yourself " way to do it.
1. You will need a installian kit that comes with instructions how to do the installation.
You get the door sills x2 (Left / Right)
Zip ties x6
Wiring with lighting
Alcohol wipes x2
Instructions (Touch and go if you are not confident at this stuff)
2. Undo the battery negetave terminal.
3. The next step is to partially remove the passenger side A Pillar (you don't need to fully remove this). Start at the end furthest away from the dash and just grab it either side and give it a good tug and work your way forward.
4. You should be able to see the cabling hidden behind the pillar, disconnect the wiring plug.
5. Now you will need to separate out the specific cables that you will need when you start to splice in the supplied cabling (Red and Black cables) in the kit. You need to find the (Black/Light Blue) and the (Yellow/Green)
The 2 at the top left!
6. Now comes the tricky part (well not really) - The Wiring! So we need to attach the supplied wires (Red / Black) into the current wiring (Black/Light Blue) and the (Yellow/Green). To do this I used splicing taps which are a little easier than cutting the wire cover off from one wire and soldering the new wire to it.
7. So you will need the Red wire (supplied) to connect to the Black/Blue (in car already) and the Black wire (supplied) to connect to the Yellow/Green:
8. Once happy, use electrical tape to wrap each connection individually, I then used a zip tie to tidy the cables and keep it out of the way. (Unfortunately you cannot tell if there is power running to the cables as the battery is not connected.
9. Connect the cables now to the door plugs or stills.
10. Connect the battery negative terminal.
11. The sill lights should work now.
12. Complete the sill lights installation.
Please give me feed back of the installation process.
Johannes.