I did search but only found mostly my own thread despite advance search. I know this topic certainly can't be new so please don't yell at me.

A user named RKW77080 helped me a lot in the past with my LS430, reached out to him via email.

End goal: install exterior puddle lamps into my aimgain side skirts. Talking about likely less than 2-5 amps at most.
Challenges: Utilizing the dome light or mirror light as the ground (PWM) switch/source utilizing a MOSFET as relays aren't the way to go for this set up. I am not too familiar with MOSFET's in general as i used to always use relays but its definitely not smooth due to the PWM.
Question:
1. Anybody know off hand where the dome light ground switch is off hand? It has to run down one of the pillars to a module.
2. Anybody can provide some assistance on the mosfet diagram below?

I've been doing some research and can't always rely on chat GPT as it actually spat out a diagram that had me connect a hot wire to a negative wire LOL. Then it admitted its mistake after I questioned it. Been researching and watching videos but hoping you can shed some light.....

Below is some output from ChatGPT but the diagram it spat out was wrong so I used PAINT program to mock it up.

Does this make sense? Particularly the resistors? The exterior lights are just being used for puddle lamps on the side skirts to mimic the dome light so that it fades in and out via the PWM ground switch from the cars BCM when approaching the car, unlocking the car etc.

Any input would be greatly appreciated



HELP!

 

OK, no luck on this topic huh.

Forget about the MOSFET, there has to be folks tapping into the dome light ground switch for things like this. I know the car is LINBUS method to the BCM/ECU.

I've tapped into the footwell lighting for other things but because those stay on all the time, this isn't a good option.

I've looked at wiring schematics too but its not exactly my forte. Hopefully someone has good input.....

Anyone? Again, looking for a good switched ground source wire, dome light behavior in particular.

 

attached is a higher def PDF.