Originally Posted by bartvdv
I got a new battery.
I managed to start the engine by using a thick jumperwire from the pos battery pole to the glowplugs. WD 40 helped also :-)
The startmotor seems to be normal.
BUT: if i try use the glowplugs the normal way, the relais switches off after 20 seconds...
Its a relais from Ford cars rated for 70 amps.
I will order a new relais online.
I had a VW diesel. IIRC, the glow plug relay would hold for about 10 seconds and then shut off and stay off for a minute or so. As we were often in very cold weather, I Installed a separate switch to a separate solenoid which fed battery to the glow plugs so I could over ride the automatic switch. Never had to glow much more than 10 seconds, but it allowed me to try again, if needed, without waiting.