With the cold mornings I've started to find the car reluctant to start again. As I'd replaced the glow plugs last year I didn't think that could be the problem. The indicator lamp only comes on for less than a second and I thought maybe there was a fault in the supply to the plugs so I clipped a test bulb across them. I found, to my surprise, that the supply was actually active for 5 seconds. It turns out that if I turn the ignition on and count to 5 before starting it fires up fine. Try sooner or leave it too long and it struggles.
So the indicator is totally useless as a guide to operating the starter. How stupid is that? I'm seriously wondering whether to wire in a permanent indicator.