12 volt problems

[baztops]

I have a Bailey Ancona gt65 l recently have been out and the 12v failed so the control panel at the door doesn't work as well as the other 12v systems IE lights ect l checked all the fuses ,the battery and the charger unit which are fine my only other area was the PCB 184 l checked on the rear of this and l only had 1 No 12 supply the rest were dead has any one else had this problem where they were working 1 minute and then for no apparent reason not the next

 

[IanB1485]

I have the same relay/fuse board and the master switch controls RL5 which then brings on the other circuits so either a dry joint, loose connector in the harness from the master switch to the relay /fuse board or faulty relay contacts would cause the issue you having.

 

[baztops]

Thank you for taking the time to reply

 

[Scannyman]

Sounds like a transformer issue to me if issue is still there on 12V and on 240V hook-up

 

[IanB1485]

@Scannyman the OP has checked his charger/PSU (what you call a transformer) and found it to be OK. The fridge control and permanent supply to the radio don't go through the master switch or master relay , he has 12V power to the fuse board but not coming out of it , so either the master switch or the wiring to and from it or the master relay on the fuse PCB is faulty.Given he said the 12V lights work and the water pump , that rules out the master switch wiring as it connects the lights enable and pump enable switches on the control panel, so that leaves the wire back to terminal P4 on the fuse pcb or the relay 5 coil or contacts.