Linking headlights to interior light

[geraintthomas]

Any news on the testing side?

[Meir]

Originally Posted by geraintthomas

Any news on the testing side?

Didn't get a chance to look at it this past weekend.
Hopefully later this week, as I have to do some other electrical projects on the car.
I already have an OEM relay holder, and just got these today
https://www.amazon.com/gp/product/B01G7KKBYG/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1
So I can replace the wires with thicker ones.
Also have this on the way
https://www.amazon.com/gp/product/B00ZYXHR6S/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1
To remove the existing pins from the relay holder.
The idea is to use the correct wire gauge and locate the relay on the relay carrier above the fuse box.

[Meir]

so i spend some time today going over the diagrams, and looking at the fog light circuit.
it looks like the lights should be isolated from the switch before power is directed to them. otherwise, the light switch will be probably damage.
not a big problem, will just have to use a 5 legs relay.
i also tested the wire that comes from the BCM, and basically going to trigger the relay.
wanted to confirm that the relay will not chatter when the power gradually drops, and the lights are dimming out.
i made a short video of the process.
https://youtu.be/jPfQFOOu45c
after filming the video, i thought it will be a good idea to add a timer to the setup, so i will be able to control the length of the "On time" after locking the car.
so i will probably get something like that, and also use it as the relay.



might even go pro and add a Photoelectric Switch :dance:
Zing Ear SNR100A Photo-Electric-Resistor-Cell Light Detector Sensor Switch 25W | eBay

[Meir]

just because i don't like threads that don't end
i just got today the parts i order from fleebay (under a month from china is not bad).



the big board is the timer, that has a NO/NC 30Amp relay.
so i can connect it directly to the fog light wires.
the small board is the photoelectric sensor that will control the timer.
so basically it is going to be connected to the interior lights, and will trigger the timer only when it's dark. the lights will stay on (after i lock the car) for 10 seconds or any other settings i will put in the timer.

so before i start i want to modify the components, and check the power consumption.
if it will be within reasonable values, i will install it.
will keep you posted when i make any progress.