Afternoon all. As you may know, I've been having trouble starting my pd170 of late, particularly first thing, or when it's been sitting for a while. I thought it would be something like glow plugs, starter motor or alternator, as I'd replaced the battery in January, I discounted that being the cause of the problem.
Took it to a mechanic friend to have a look at it today. He scanned it for faults (pic attached) nothing obvious presented itself. He then connected the battery to a meter. It showed a constant 0.3 of an amp being drawn from the battery. This was with absolutely everything switched off, we even waited for the mfd to kill itself. He started methodically pulling the fuses while I watched the meter, nothing changed. It was the same when we pulled the fuses from the box in the engine bay, nothing changed the meter. When we disconnected the lead from the battery to the engine fuse box, the current dropped.
This is where he started scratching his head. No one fuse in that box altered the meter, but the entire box did, if that makes sense? He then unscrewed the box (torx bolt right in the middle of it) and the current dropped again on the meter.
He's totally stumped, and before we go to a costly vw electrician, has anybody on here had a similar problem? Something is draining the battery, but we can't figure out exactly what. We know all the usual suspect parts (battery, alternator, starter etc) are OK, and we can't narrow it down to any one fuse, so what else could it be?
Pic of fault codes, although I doubt they're relevant. It did throw up an intermittent engine speed sensor fault, but he reckoned that was down to it not turning over at the right speed when I've been trying to start it. The airbag warning has been cleared as well.
As always, any helpful suggestions will be greatly appreciated, apologies if I haven't explained it properly here!
Took it to a mechanic friend to have a look at it today. He scanned it for faults (pic attached) nothing obvious presented itself. He then connected the battery to a meter. It showed a constant 0.3 of an amp being drawn from the battery. This was with absolutely everything switched off, we even waited for the mfd to kill itself. He started methodically pulling the fuses while I watched the meter, nothing changed. It was the same when we pulled the fuses from the box in the engine bay, nothing changed the meter. When we disconnected the lead from the battery to the engine fuse box, the current dropped.
This is where he started scratching his head. No one fuse in that box altered the meter, but the entire box did, if that makes sense? He then unscrewed the box (torx bolt right in the middle of it) and the current dropped again on the meter.
He's totally stumped, and before we go to a costly vw electrician, has anybody on here had a similar problem? Something is draining the battery, but we can't figure out exactly what. We know all the usual suspect parts (battery, alternator, starter etc) are OK, and we can't narrow it down to any one fuse, so what else could it be?
Pic of fault codes, although I doubt they're relevant. It did throw up an intermittent engine speed sensor fault, but he reckoned that was down to it not turning over at the right speed when I've been trying to start it. The airbag warning has been cleared as well.
As always, any helpful suggestions will be greatly appreciated, apologies if I haven't explained it properly here!
