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#1
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Blowing a fuse: 100A Main...
So, I'm back. I'm picking up a '92 Green SVX from the same woman I sold Svixen to ('94 FWD), and bringing it home.
The reason it's coming to me for free is because it has a short/grounding problem that is large enough to blow the 100A main fuse. I'm going to check the main battery terminal connections and wires, look for grounding issues there, and from there check the alternator wiring, and check the coil on plug packs for any signs of arcing... After that, I'm outta clues. Anyone got any ideas?
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'92 SVX LS-L Project Car for Open Road Racing |
#2
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Quote:
head light relays mounted within the main fuse board and an unlikely cause. No doubt you will have in mind the possibility of someone having added to, or messed with the original wiring, or substituted solid fuse links.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#3
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You could unplug all the fuses, and fusible links, then put them back in one by one until the fuse blows again. My guess, and this is just a guess, but Trevor may be onto something. I don't know how to check fusible links, but someone may have substitued a piece of wire for one.
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[SIGPIC]http://www.subaru-svx.net/forum/image.php?type=sigpic&userid=5569&dateline=1207440 507[/SIGPIC] Naught but by the grace of God "42" Current Stable By Age:'89 Subaru XT6 Silver "Audrey" as in Hepburn '96 SVX LSi #767Brilliant Red "Lil Red" Now on the front burner. Looking for a totalled, but running parts car. |
#4
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I think I might have something...
Started the car using a nice piece of 10 ga. solid wire in place of fusible link, and car would run for about ten seconds, then die. In that time, it sounded like the alternator was whirring about in an unnatural sort of way. I have a replacement alternator, and now that I'm home from where it was, I have time to play with it. I'm going to install a nice alternator out of one of my Foresters (XT) and see if that clears up the problem. Thanks for the help, and I'll let you know how it goes. Pictures to follow.
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'92 SVX LS-L Project Car for Open Road Racing |
#5
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This is standard procedure for diagnosing a difficult to locate problem like this, but any problem in any of the other circuits would really fry some stuff if it was enough to blow one of the main fusible links. I would look for a wire that is shorted to ground, like one that had the insulation rubbed off or something like that. The alternator may be whirring like that because of the draw on it. They make a different noise when you really load them down, like when testing.
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2007 GS 450h-Active Stabilizer/Radar cruise 1994 L Blue 3.70 VTD ASE Master Automobile ASE Advanced Level Specialist Toyota Master Diagnostic Technician (former life) |
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