Light issue

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Been toying with torque pro and car gauge pro, no luck getting oil pressure to work, brought up a question....is the oil sender a dummy switch on the 2003 4.8 trucks?  On/ off at X psi?

I'm used to older EFI where the oil reading either shown normal or nothing but this truck the psi fluctuates with RPM and oil temperature, wondering if it's an illusion of function as the sensors a switch or is it actually functional?

Dome light stopped coming on with the door opening again, seems like a bad connection.   Car gauge pro has an option to test the door module, haven't tested it to see if it'll work on this truck.

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Car gauge pro app supposedly checked for codes, door module function, BCM, etc..  said self test No failure on each.

Earlier I opened the door, nothing, so I pushed the cargo light button, door light, dome light came on locks mirror became operational.  Add that to the list of things that override the DDM function or lack thereof upon entry.  Turned dome light off, closed door, minute later, door back to not working.

When the weather first became frigid, the door, dome light, worked as it should for a couple days, then went back to disfunctional.

 

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Went back to basics.

Rolled truck window down.  Waited a minute, opened door, nothing works, no locks, mirror or lights.  Immediately removed door panel, disconnected ddm.  Tested the main four wire connection.  Orange, shown 12v+.  Black, tested from a random point on the actual truck frame (ohm continuity) to the female opening on the connector, tested good.  Also tested small orange wire, shown 12v+.

Read somewhere the brown wire should show a random voltage but with key off, was showing nothing, not sure if it should be tested key on?

But, reconnected the DDM, main four wire connection last, as soon as it clicked, door and dome light came on, locks mirror tested good.  Nothing new, wait a minute and it'll go back to dormant.

Sound like bad DDM or programming?