Spent a few more hours on the Sprint this morning. When I got the bike the oil light worked but after a few starts it went out but sort of glowed when the motor was running. I didn’t worry to much it didn’t run badly at all, I thought electrical gremlin more than low oil pressure. A gamble I know but that was the choice. Anyway when I changed the clocks I put new bulbs in the idiot lights as there were some cheap LEDs in the old clocks. The oil light never worked again. I checked the oil light bulb again and it was fine. Oil pressure switch is a known weak point I was advised by the Triumph cognoscenti. So replaced that and no joy it made no difference.
I got the manual out and studied the wiring diagram. Traced the wiring runs from joint to joint. All good until I checked the last one between the pressure switch to the first connector behind the battery box. So simple enough to fix, ran a new wire and replaced the connector. Covered everything in dielectric grease reassembled everything and the job was done. All technically simple enough but it took bloody ages tracking the different connections on the loom and making sense of the wiring diagram next to the bike. I got there in the end but what made it more of a ball ache was that some of the wiring colours were different to the illustration in the Triumph workshop manual. Yes I checked I was using the right diagram with the bikes Vin. Must have just been a random week that mine was built in Hinckley
Works perfectly now though. Next job is to sort the low fuel light.