I got myself a dc clamp after a recommendation to get one from a member off here, forget who, when I first got her just over 2 years ago. Used it for the first time around a month ago to check current draw on the heated front screen as I had 12v at the screen but it didn't work, turns out the clamp on is faulty and out of warranty feckin fecker.
I'm a dab hand at whipping off the tat to get at the glow plugs so a dmm will suffice to check for voltage there but I'll look at voltage in/out the relay first cos that's easy to get at. I'm more pizzed at the matrix issue, dash out! Got to pop my
(cherry) some time I guess.
Wish it had done it when the weather was warmer cos I'll have to do it on the drive.
Going to go audi I think
@TITCH SANDERS has just done it.