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02-25-2009, 02:12 AM
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| perplexing electrical problem a real head scratcher but it could be so simple i am not seeing it. hey what isn't these days? 72 fj40. new batt. power OK from batt to amp guage. (W) power OK from amp gauge to alt (WB), ign switch (RB) and fuse panel (W) ign switch OK fuses 5, 6, 7 (output side ) no voltage disconnect BY, GR, LR wires output side of fuses 5,6,7 voltage restored ! disconnect spark control computer, output side voltage restored ! hotwired starter at ign switch no result in fact voltage at RB wire drops to zero when hotwired starter will work when jumped across terminals at starter engine will start when igniter (coil) and starter are hard wired from batt. regulator= WR , WG both hot until WB is attached alt= main WL hot, WG hot, WB zero unplugged everything, headlights horns, rear heater, all switches reg= all hot alt= all hot is this all being caused by the spark control computer ? can i get one ? can it be bypassed? thanks, journey46  |
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02-28-2009, 06:35 PM
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| Wow dude, I have a 72 FJ-40 and I don't have a spark control computer? what engine are you running? |
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