Hi can someone please help me cause I’m going crazy - glow plug light came on and stayed on for half a min. Then day after ecu light came on. Computer said glow plug 3. So I’ve had all 6 plugs changed. Problem still there…. Then today the garage changed the glow plug relay. I’ve just got it back, and after I started it the glow plug light came on again and stayed on for half a min. Car starts fine and ecu light has gone off. Is this normal. Cause as far as I’m aware the glow plug light should stay off when started ???