joedoesnotlikelandrovers Posted May 10 Share Posted May 10 (edited) Hello hive mind! I'm hoping someone will save me a lot of time. I'm not a defender fan but my neighbour brings his td5 to me every now and again to resolve some typical nonsense that a previous numpty has bodged. Fuse 28 intermittently blows, it's stopping the starter fuse, fuel pump and position 3 on the keys. The cable from the 30a fuse is brown with a purple stripe, it bangs out immediately, if I pull the fuse box from its mount disconnecting the earth path it has load but won't blow, but the fuel pump doesn't prime and no secondary dash lights. I can't trace where that brown/purple cable goes to. Edited May 10 by joedoesnotlikelandrovers Quote Link to comment Share on other sites More sharing options...
TSD Posted May 11 Share Posted May 11 Not sure about Fuse #28, I didn't think a Td5 had that many fuses.... Fuse #3 (of the 'engine compartment' fusebox) is 30A, and has a brown/purple wire. It feeds the rear screen heater and the switch on the dash. If it has aircon, Fuse #9 (of the 'passenger compartment' fusebox) is 30A and has a brown/purple wire, which becomes plain brown at a joint somewhere and feeds the front blower motor. Wiring diagrams etc. are available here Quote Link to comment Share on other sites More sharing options...
joedoesnotlikelandrovers Posted May 11 Author Share Posted May 11 Unsure about the td5 part now, it's a 2004 defender, the fuse board is located in front of the gear selector. There are three sections, 2x rows on the right and 1x lower row on the passenger side, the last fuse here is a 30a fuse, no. 28. It's labelled as Aircon on the back of the cover but this is absolutely not the case 😅 It seems to control the last section of the key, the dash lights don't operate, no glow plugs and no fuel pump priming. The key then won't turn the engine over also. It's a definite short as it's blowing the fuse straight away. The brown/purple travels into the bulk head and then I can't figure out where it disappears to. Quote Link to comment Share on other sites More sharing options...
joedoesnotlikelandrovers Posted May 11 Author Share Posted May 11 (edited) Also to note, it's a diesel model, no electric windows or Aircon setup. All wiring diagrams I've found state that it's just doing a blower relay but it doesn't make sense as to why it would stop everything from starting the jeep. This happened before last year but a wiggle of the fuse box sorted it and it hasn't come back until I pulled it into my shed. Edited May 11 by joedoesnotlikelandrovers Quote Link to comment Share on other sites More sharing options...
Junglie Posted May 11 Share Posted May 11 Has it got some sort of aftermarket immobiliser fitted? If so, that might be the culprit rather than the fuse... Quote Link to comment Share on other sites More sharing options...
TSD Posted May 11 Share Posted May 11 5 hours ago, joedoesnotlikelandrovers said: .. it doesn't make sense as to why it would stop everything from starting the jeep. You'll get no help throwing around language like that OK, now we know which diagram to look at, fuse #28 seems to be the renumbered version of the fuse #9 I mentioned above. It goes to connector C0277, which is tucked in somewhere around that fusebox bracket. It does seem it shouldn't be connected to anything from there, but it's obviously the next place to look. Follow the link for the relevant page in the excellent connector library, which I suspect LR published because they felt guilty about their appalling circuit diagrams Quote Link to comment Share on other sites More sharing options...
Anderzander Posted May 11 Share Posted May 11 Link 3 and 5, which are under the seat, connect to the fuel relay and ignition respectively - so it does seem like you have some modifications… ? Fuse 28 on the panel would go to the air con blower … which I’m guessing the Defender doesn’t have? If so then it was empty spot that someone has perhaps used to take a feed from ? 28 would go to this connector through a brown and purple wire https://www.lrworkshop.com/connectors/defender-2002my/C0786 Then from the connector TSD shared through a brown wire https://www.lrworkshop.com/connectors/defender-2002my/C0153 Quote Link to comment Share on other sites More sharing options...
joedoesnotlikelandrovers Posted May 11 Author Share Posted May 11 I spend most of my time unmodifying modifications and doing them properly on this bucket 😅 Found the culprit this evening, control wire for a rear light relay was joined into that brown/purple behind the dash clocks. It was shorted together and was blowing the fuse. Unrelated issue to my lack of ignition power though, more tracking of fuses now Quote Link to comment Share on other sites More sharing options...
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