Footwell lights - triggered by dome but remain on while truck is on

Wondering if this is even possible.
Looking to wire a set of footwell lights that are triggered by the dome but then remain on as long as the engine is on. Would use the dome wire in the a pillar to trigger but keeping it on or switching power sources when the engine starts is the question.

Any help would be greatly appreciated.
Thanks

 

You will need a SPDT relay to do it. Also will need to grab each individual door trigger and diode isolate them to turn on the relay.

Pin 85 - 12v constant
Pin 86 - negative in from door triggers
Pin 87 - 12v constant
Pin 87a - 12v Igniton or accessory
Pin 30 - 12v out to footwell lights

You will need to ground footwell lights as well. And make sure you fuse 12v leads to relay

 

Thanks
If I tap the dome trigger wire in the A pillar can I put a diode on there instead of each individual door trigger? Or am I missing the point here?
Would it be easier if I used DSIMs rock light module?

 

Got it. So I would just need to add the relay and tap the purple wire coming off the deck light switch assembly?

 

Yes

 

Sweet. Let you know how it goes.
Thanks

 

Always HOT/BATTERY:

Sunroof is a good one. Seat heater also..unless you use it up at
Haleakalā

 

OP when you do this, take pics. I'm looking to do the same thing but all the electrical jargon is over my head honestly. Good luck!

 

The DIY trim

 

Not a stupid question.
No 3rd gen trim levels have this feature.

 

Another "way"...

 

Sorry for the delay in progress. Worked perfectly using the first wiring diagram tapping the purple wire on the cargo light switch. Thank you @caribe makaira

 

No pics of the install?

 

No sorry. Mounted relay in the engine bay on rago relay mount then ran wires inside the cab to fuse panel and the purple wire. Leds were little 5 led bars 3m taped to bottom of the dash.