It is a dual function light.

On with a door open & it can be switched on with the doors closed.

They get sourced by ground door switches on a yellow wire. This wire must be plugged on some provision around on underdash harness

Well, the pink wire is connected because it turns on with the switch, just not with doors.

Wrong. The Pink is hot all the time. Yellow is the switched to ground to complete the circuit. The map light has one other wire I think black that is a fixed ground to the map light can work independently from the door switches.

That's what I'm saying. He is getting troubles with the door jam wir ground circuit, because since he is able to turn it on with the switch with the chassis ground, it means the pink wire IS connected.

Sure I know pink wire is batt positive!

I never said the pink wire goes to the switch, I meant the pink wire is conected because the map light is working with the switch. Where I'm saying the pink wire goes to the switch or the switch handles positive ? is working because the switch to feed the chassis ground is able to turn on the bulb since the positive is arriving... too! Never specified where is arriving positive, just that the system is working because both poles are arriving... somehow. Just the ground from door is not, hence the reason why doesn't turn on when opening doors.

If both poles weren't arriving, the map light wouldn't work, no matter where arrives + and -. Then that also means there is nothing to check at fuse box, because + is present at map light.

many ways to say the same.