D2 TD5 Firing before in crank position

After doing the head on my d2, (it has sat for about7 months) I fired it up and it has developed a fault where it will fire before I get the key to the crank position, So when it is on accessory live it fires up.

I have had the BCU out and that's dry as and looks absolutely fine inside.

The fuse board below the drivers side did look a little funky, so took that out and cleaned it up.

The problem is, if I leave the car a few days and then try, it doesn't do it and fires as it should in the crank position (the windows also work as they should...)

Once its ran for a bit if I turn it off and return and try again, the problem has returned. The windows also refuse to operate when this problem appears.
before I change the fuseboard has anyone got any suggestions?

I have been running a commercial dehumidifier in the car for a bout 4 weeks now to remove any moisture in side as the sun roof is a little leaky. The car is now dry as can be inside

Could the ignition switch be faulty?
It would be a good idea to stop water leaks getting in.

Anaconda said:

Could the ignition switch be faulty?
It would be a good idea to stop water leaks getting in.

Click to expand...

Plus 1^
Easy enough to dismantle and test the wires and connections to it.

If the cranking symptom comes together with windows misbehaviour it's most probably the IDM fusebox hurt by corrosion, no other way to rule it out than replacing it with known good one which comes from same modell(facelift ot not)