Many thanks gents. Purchased Hawkeye, smart tool, compressor fooked.
swapped and all is good, happy days only 800 sqid with oil and filters, just need to service gearbox now
No evidence of damp in wheel well or in side compartments. Compressor doesn't smell burnt. Conections on multi plug all clean and no power on any cable.
On arriving home too the single chime from the dash and the massage air sup inactive. And no lights on the ride hight .
Had alook at the fuses all look ok. Thats me done now need ideas from some of the best brains in Britain. Many thanks