Similar issue to the other sttng thread I have half the backbox lighting out on, shadow, powered from J120 I have 2 strings (yellow 3&9 and green 5&10) these run the power to the backbox.. Connectors looked dodgy so first port of call was to replace them which I have done, tested continuity and all good from connectors to sockets, testing power on both sets of pins are good when not connected but when connectors on no volts on yellow set of pins (3&9) remove the connector and solid 6.14v on the pins. Scratching my, head with this one where should I look next? Swapping 3&9 with 5&10 results in bottom half working fine and top half out so bulbs and connections are all good.
