Hi all I am just after a bit of advice on glow plug system on my 2003 td4. I have no light come up on the dash when ignition is turned on I think it could be a faulty relay as there is power to the relay through the big 100a fuse and there is power getting to the relay to energise the relay but the glow plugs do not activate. The glow plugs have all been changed and are all in working order. Would a faulty relay stop the light from working as it always did work. Any help will be much appreceated. Thanks in advance