2011' Jayco Jayflight - Living Room & Porch Lights

[HappyCamper68]

Hello,
I'm having trouble with my living room & porch lights on my 2011' Jayco Jayflight, they do not work.
I've checked the fuses and they are good. I replaced the light switches and they still are not working.
Any ideas on what to check next?

[RoadrunnerII]

How about the bulbs?
Or are they led fixtures?

RoadrunnerII

[HappyCamper68]

The bulbs are not LED. I did try new bulbs and nothing.
It's the four main lights and the outside porch light that doesn't work with battery power or when the trailer is plugged in.

[RoadrunnerII]

Time to get the multimeter out...
Check for 12 volts at the switches and work it from there.
Those scotch lock connectors are known to get loose

RoadrunnerII