Latest update…….. Tried all the kind suggestions made - Thank you.
Disconnecting battery for couple of hours had no effect. I “think” I can hear the strange “squeak” when the bike powers up along with the fuel pump priming. Checked the blue wire from the grey multi pin plug under the rear of the seat to the J3 pin of the BCM plug and there is continuity there.
Then decided to use my multimeter to measure voltage across the blue and black wires of each rear light unit and the light unit in the tour pack and, to my great surprise, I have just under 5 volts at each of the light cluster and tour pack plugs. So do the LED’s in each of the driving rear lights need 5V to operate? And if one LED bulb has gone or is faulty would that cause them all to not work? I am assuming that there are NOT separate LED’s for rear driving lights and rear brake lights?
Bob