UpdateIts all of 'column' 4.
No broken wires - I looked real hard.
No shorts ( that I can see ) - that would be 2 parts of one of the switches touching each other that otherwise are not meant to OR another component (like a Gi bulb holder etc ) touching one of the switches in the column / components of the switch - correct?
Fuses checked - seemed good but replaced just in case.
SURELY this cant be the result of me placing 2 x '89' style LED flashers in place of standard '89' style globes ( which I have done with success before )
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