Oh woe is me :( Seems the glow control regulator is working fine. I took it off, cleaned up the contacts and replaced.
I managed to get the connector off the left hand most glow plug (when looking from the front) and measured the voltage. A pretty solid 12v (no voltage drop from the other 3 connected, which surprised me a little). This voltage was applied for a good 5 seconds EVEN THOUGH the glow plug dash indicator lights still goes out after 1/5 second. (As an aside, I did this 3 times, so 3 x 5 seconds voltage applied to the plugs, and it still needed to crank far too long before starting).
So, I measured the resistance of the plug I could get to. 42 ohms ! I then managed to get the connector off the adjacent plug and that measured 45K ohms ! I assume there must be a current sensing device that is used to light the glow plug dash light (and also indicate to the ECU that all is working well).
So, after 160k miles, it seems I may have to replace the glow plugs, what does the forum think ? The main issue is that the turbo charge inlet pipe runs right across and needs to be removed and even then, access is not that good. Additionally I really don't want to snap any of them off. Any suggestions.
Any idea what size deep walled socket I need ?
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