Exterior light problem

[R20WLA]

Hi
I have a 2011 BG caddy maxi which I’m busy making into a day van for the family, unfortunately I’m having a few problems with the exterior lighting on the van.
Firstly the front DRL’s aren’t working but when you left the handbrake off the headlights and DRL’s come on even though the switch is switched off.
When you put the side lights on they work fine but switch to dip headlights and they come on but side lights go off.

I have checked all the fuses and all ok as all the lights work but just no in keeping with what your switching on.

I get the following fault codes

Open to short plus bulb for fog lamp left 1496
Open to short plus bulb for fog lamp right 1500
Open to short plus bulb for 3rd brake light 1503 m25
Open or short plus bulb for back up light left 1518 m16
Open or short plus bulb for back up light right 1519 m17
Open or short plus bulb for parking light left front m1
Open circuit Terminal 30 for interior light 00059

Anyhelp would be greatly appreciated

[Bahnstormer]

The DRL's are probably coded to switch off when the handbrake is engaged, I did this on mine because I didn't want the lights on while I was warming the van up in the morning before work.

Sidelights switching off when the headlights are on is normal.