Dirtylarry Posted December 18, 2016 Share Posted December 18, 2016 Hi All I am trying to get the glow plugs working on the car. (Discovery 1, N-reg, immobiliser disconnected) The circuit for the relay is all wired in and works. there is a fused connect (60A) straight to the battery. I have tested for continuity from the relay to the glow plugs at 1.5 ohms. what happens is when the circuit is activated the fuse blows straight away. It looks like I have a short-circuit, I have yet to get down and dirty and look for a bare wire. what I am wondering is 1. Could the short circuit be due to the disconnected immobiliser circuit still being live? 2. If I were to disconnect the yellow/black from the relay to glow plugs (it disappears into a spider and I do not know what is going on in there) and put in another wire direct from the relay to the glow plugs, would that possibly cut out the short-circuit, or is it likely to be there anyway? 3. there is a strange little plate on the engine side of the bulkhead just close to the washer reservoir. what is it? it appears to be functioning still, but it ends in a dead end...(i dont know if this is relevant) hope that makes sense Jamie Quote Link to comment Share on other sites More sharing options...
Dirtylarry Posted December 18, 2016 Author Share Posted December 18, 2016 one other thing. would the short circuit be located between the relay and the glow plugs? or could it be anywhere? Quote Link to comment Share on other sites More sharing options...
sierrafery Posted December 19, 2016 Share Posted December 19, 2016 (edited) It seems that there's a short to earth between the relay and glow plugs, route other wire and leave the old one 'in the air' Edited December 19, 2016 by sierrafery Quote Link to comment Share on other sites More sharing options...
Snagger Posted December 19, 2016 Share Posted December 19, 2016 It could be a damaged glow plug shorting out to the head. Quote Link to comment Share on other sites More sharing options...
qwakers Posted December 19, 2016 Share Posted December 19, 2016 best thing to do is disconnect the wire to the glow plugs and insulate it and see if it blows then. it will at least identify where the issue is... Quote Link to comment Share on other sites More sharing options...
Dirtylarry Posted December 23, 2016 Author Share Posted December 23, 2016 just back from working this week, sorry for the late reply Thanks for all the advice, I will take a look when i get a moment over xmas! Merry Christmas all! Quote Link to comment Share on other sites More sharing options...
Dirtylarry Posted December 31, 2016 Author Share Posted December 31, 2016 HI Thanks everyone. I disconnected the glow plug lead, and insulated it-then tested it-the fuse did not blow then I connected up the glow plugs one by one, and tested them until I found the culprit....glow plug no.4! Happy New Year! Quote Link to comment Share on other sites More sharing options...
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