Hi, I have a 1998 vw golf diesel with the engine code of 1y and the glow plugs will not heat up. I have replaced the glow plugs, but there is no power getting to them. I have checked the relay and this is ok, I have checked the wiring and cant find a problem. The glow plug warning lamp comes on for about 3 seconds and then starts to flash, any help would be appreciated, Thanks Mark.