power problems with my door jamb switches.

So, my 2003 Tacoma's curtesy lights and dome lights will not come on unless the truck is running, I have checked all fuses that I can think of the blubs are good but replaced for good measure.
I also check the door jamb switches for continuity, and they are both working well. when I check the dome light to make sure it is getting voltage with the truck off, and the dome light switch set to the on position I get 3 to 4 volts with the truck off but with the truck is running, I get 12 volts. When I check the door switches and the power going to them it is also only 4 to 5 volts. so, I'm assuming that it is supposed to be 12 volts there also instead of 4 to 5 volts. but I am at a loss for what to check next I can't find a diagram or anything. any and all help is appreciated guy and girls' thanks in advance.

 

Did you happen to put LEDs in the interior lights?

 

Yes, but…..

https://www.tacomaworld.com/threads/please-help-with-light-problem.795535/

 

What was wrong with the first thread??

Not the answer that was wanted??

 

tiring to post in different threads to get the highest amount of reply's and potential help that's all.