Technical Fiat Ducato x250, 2015, 3.0, Minibus, no side lights issue

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Hi Guys, I have a Ducato, 2015, x250, 3.0. It is a Mellor Minibus, I have an issue with no front and rear side lights, this also has the marker lights fitted to the sides (also not working as side lights). When I turn lights on from the stalk, the relay clicks in then out within 2 seconds, the dash light indicator remains lit showing lights are on but they're not. The lights all come one with the relay for the 2 seconds then out.

A couple of times the lights worked as they should yesterday but refuse to work again. The rears on this vehicle are LED type (what looks like Land Rover Defender type).

Any help would be appreciated and I will post when I find the fix to log it on forum.

Thanks

 

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To update, I discovered rotten wiring at rear and bodged conversion from bulbs to LED's, got it going for now and have ordered some parts to fix it properly!