So, today I decided to upgrade the rear turn signals to LED. That bit went well and both flashed at the required standard rate and that was that; or so I thought. Being thorough, I decided to check the rear light and the tail light. before I buttoned everything up.
Nothing from either!
Checked both elements of the light unit on the bench with a 12v source. Both A1.
Must be a bad earth I thought - Checked the black -12v common at the plug - good
Checked the Brake and the Tail Light terminals at the socket against the -ve at the battery with a multimeter - nothing on either.
This is with ignition on and even tried with the engine running.
Checked lighting fuses - all OK.
Any bright suggestions?