![]() #1 - Connect the earth cable to the battery post. I'm currently (no pun intended) operating a two-stage ignition sequence: (but that said, I'll measure the volts in it tonight, leave it disconnected and retest in the morning, it's it's lost anything on no-load, it's implicated itself (for at least a drop-test at the garage)).Īlarmingly tho' retesting the at-rest draw after driving around for a bit the parasitic draw is now 10.7A :Campfire. The battery is a Bosch, and it's only a couple of years old, and it's been fine until this happened, plus it took charge like a good 'un, and I've started and driven the truck a couple of times tonight with no problems, so I'm ruling out a battery failure for now. Next stage will be to pull the wiring to the starter / alternator and see what happens - after that, it'll have to be the battery I guess - it might have just given up. Usefully the electrics are simple, I don't have to worry about any computers / ECU / vehicle management sensors and the like, so it can't be that hard to sort out. tho' that might make it self-evident in a day or two, as whatever it is will just fail. The only stuff that I can think of that's not protected by the fuse-panel are the starter and charging circuits, and I guess a collapsed winding in the starter or alternator might be drawing / shorting that much current, although I'm still puzzled by why I can't spot the continuity to earth if that's the case, unless there is some weird induction thing going on - but it's a kinda big amount for induction. Additionally, there was no continuity between the live cable out into the vehicle and earth, which kinda rules out a direct short somewhere too. I put the battery on charge all day, popped it back in tonight, and she started on the key as eagerly as she does every time (exactly as I expected).Īt rest, with the ignition off, there was initially about 3A draw on the battery (and as it's only tickling a few minor things along, I should only be seeing a very small amount of current at rest), so to try to narrow this current leakage down, I pulled every fuse out in turn and tested each time, and the result was consistent throughout - the same draw - so it's nothing on the loom that's upstream of the fuse panel. I've done 200 miles this week, and as far as I know the charging circuit is fine, so something has drawn power overnight and flattened it. (it actually measured ~2.5v on the meter). A quick couple of checks showed there's no power in the battery. Hopped in, and turned the key as usual this morning, but nothing happened. but, in it's favour is that it's not been hacked about, so I'm pretty confident that I'm not going to be chasing some ghost through the wiring loom. It is quite scruffy now and time is taking it's toll on the comedy metal they are made of. For context to the question - I'm talking about my '93 plate 200TDI CSW, which has been ultra reliable in the 7 years (and 45k miles) that I've owned it - it's regularly serviced, and mechanically, it gets what it needs when it needs it (given that it's my daily-driver (and I'm community based, so it really is a *daily* drive)).
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