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I have had the plugs out and tested direct from battery’s, but what I think is a possible problem is the feed to the glow plugs when in place. Hence me thinking control box or bad earths. any suggestions in testing plugs when in place.

Ok very good point, I guess I can run a earth wire wrapped around the glow plug to block to double check.

Ok so a update......pulled the solenoid and that’s fine, fuel pump chucks out lovely. So I moved on to glow plugs, when I first turn the wait switch it goes from negative to 24volts for give or takes 10secs then turns of etc. So when I then pull a glow plug out and turn the switch they are not...

Thanks for the heads up, appreciate it. I’ll check that power feed as soon as I can. At least solenoid is straight forward to replace if need be. I’ll just buy a new solenoid and not the whole top cover.

Thanks for the reply, can I ask what you would check for then before condemning the solenoid?

Hi all, looks like Iv got my first hmmwv which I’m very happy about but won’t start at the moment. got a suspected faulty fuel solenoid as will crank but not get signs of anything from exhaust. so my questions are...... is it idiot proof to replace the solenoid and once and once I have old...