Ok, getting towards 'stuck' with this one and need help.
New glow plug relay fitted, works ok and clicks in and out when forced via MES on the laptop. Old one didn't.
Had 5 new Denso glow plugs in, all load tested as ok and working. Now put the 4 working Berus back in with one Denso to see if it made any difference (one Beru ws dead). Still getting the glow plug not available message and the glow plugs aren't heating up at all on a cold start.
Showing P0683 and getting a message 'very high signal back from the control unit'. Occasionally getting 'very low signal' error.
I have load tested the wiring from the control unit down through the glow plugs to earth and they're all ok.
Battery sits at 12.6 - 12.8v after standing, 14v approx. when the engine is running. Cranks over quick enough and doesn't slow with continued cranking.
Car almost failed to start in the works car park at -2'c this morning. Took six attempts before it would keep running.
On nights again tonight and not looking forward to tomorrow morning's cold start....
Looking at maybe wiring a switch in to the cabin to control the relay for the mean time....
Last edited by Pete McK; 30-11-12 at 14:53.