ivythrone Posted June 18, 2012 Report Posted June 18, 2012 Whilst tracing an electrical fault,now sorted, I found a blown 3a fuse in the auxiliary fuse box.Nowhere in the owners guide, or the Haynes manual can I find any reference to what the 5 links & the 3 blade fuses protect. Can anybody help me please. Quote
MadBaz Posted June 18, 2012 Report Posted June 18, 2012 I can't remember what the fuses are for, but the correct name for that fusebox is Battery Junction Box, which is what it is, the main battery/alternator feeds for various parts of the car originate from this box. It's also worth checking the thick cable for signs of overheating (common problem). Quote
SilverBeast Posted June 18, 2012 Report Posted June 18, 2012 (edited) If you add your vehicle details to your signature, then people may be able to help better as some things are engine specific. MKI, MKII Diesel/Model etc I have a MKII 2005 1.9TDI (130) which, as you can see, I have just disovered tonight is suffering the well known overheating problem on the Alternator Wire (as described above by MadBaz while I was typing and taking pictures!) The Descriptions in the handbook are very confusing. It is described as the Fuse Box in the engine compartment next to the battery and TIS isn't much easier to follow! Below is from handbook, the F numbers tie in with TIS. Top to bottom are (I think):- 5 - 150A to Generator (I call it an Alternator myself!) - That's the burnt one. F107 - Starter System, Alternator and Controller 4 - 110A Vehicle Interior - I assume that's to the interior fuse box F106 Starter System, instrument lighting, clock, alarm supplies, exterior lights, daytime running lights (Scandinavia), engine immobilisation system, multi-function modules, screen washing/wiping 3 - 40A Cooling Fan Management 2? F105 Engine cooling, air conditioning 2 - Not fitted F104 Engine cooling, air conditioning 1 - 60A Glow Plugs F103 Glow plug system, additional battery, auxiliary heating 3A - 30A ABS Pump F102 ABS, ESR, ESP 2A - 30A ABS Valve F101 ABS, ESR, ESP 1A - Power Supply On board electronics F100 Alarm supplies, additional battery, auxiliary heating Edited June 18, 2012 by SilverBeast Quote
SilverBeast Posted June 18, 2012 Report Posted June 18, 2012 Missed the bit your were asking about :rolleyes: 1A/F100 is the 3A fuse! Quote
ivythrone Posted June 20, 2012 Author Report Posted June 20, 2012 Thanks for all that. I'm on a big learning curve with the ole Galaxy & I can answer my own question partially, which might be of help to others regarding the 3a fuse. What I thought was a blown fuse was in fact intact, it just looked blown (poor design& I'm a bit thick not testing it ! ) Anyway I removed the fuse, thinking it was blown.----The result was----Lost all central locking---Back doors double locked & would not open----passenger door worked on the key but not electrically----drivers door worked on the key normally---global windows had a mind of their own, going down but not up, door switches raised the windows without ignition on----lost all interior lights. However, the car started and drove, with no warning lights showing. If any of this stuff happens to ya---it could be that 3a fuse ! ! Quote
SilverBeast Posted June 20, 2012 Report Posted June 20, 2012 What I thought was a blown fuse was in fact intact, it just looked blown It looked blown to me whe I first looked at mine - it's actually more obvious that it's not in the picture above when you click on it as the picture is bigger than the real thing! Apologies if I am "teaching Granny to suck eggs". Fundamentally a fuse is a piece of wire or metal that melts when too much current passes through it, therfore lower current is a thinner piece of wire (or metal). Comapre the 3A required to blow that fuse with the 150A required to blow the link at the top of the fusebox where my wire is overheating. The crimp is failing therefore the heat is in the cable not the fuse and the box melts instead! Tip 1: If something is too small to see easily, take a digital picture on Macro setting (if it has one - usually a symbol like a flower) at the highest resolution your camera will do, then look at it either zoomed in on camera, or on your computer screen.Tip 2: If you can't get your head in a position see something, you may be able to get a digital camera in and take a few shots that will let you see what you want. ...... or you could be really sad and use a webcam and a laptop screen :rolleyes: Quote
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