Strange problem on a 93' 300 TD non turbo.
Sometimes, engine cold or warm, after starting the engine, 5 - 10 seconds later, the glow plug light lights up again and goes out when the GP relais cuts out. I mesured the glow plug resistance at the plug on the relais.
The values were from .45 Ohms for No 1, untill .70 for No 6. I think those differences are due to the different length of wiring.
Well, I did a search on this topic and found out that checking this way the GPs don't tell everything. A current draw mesuring with a battery charger would be better yet. But for the moment I don't have one strong enough and with a decent Amp meter..
So what do you guys think about it : replacing the relais ( the easiest way ) or the glow plugs or worst scenario, both.
Before you start questionning : the car starts allways excellent, warm or cold and we had 10 days temperatures below 0° C.
Thanks in advance!

Danny