I have a 6.2L diesel that is installed in a Defender 90. I don't think that this is an issue in itself, but to add context. The situation that I have is that when I turn the key to the accessory position, the dash light for the glow plugs turns on as normal showing that the system is engaged and when the light turns off I turn the key the rest of the turn to start the engine. Now the engine fires up and everything should be great, but what happens afterwards is that the glow plug light comes on and off intermittently with a series of clicks from the controller showing that the system is doing something. Can this be a problem with the controller or relay to the glow plugs? If anyone have any ideas of what the problem may be and its remedy would be much appreciated. -Thanks!