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Intermittent Short Circuit - Resolved 200 1982

posted by  jmccorison on  Sun Dec 7 13:39 CST 2008
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last visit: Tue Jan 13 07:36 CST 2009
[RELATED]

Doh!

It appears that I went and happily jump off the cliff of assumption.

I kept reading about the infamous 25 amp fuse that is located just behind the battery. One thing that I never clicked on is that this is only on LH Jet cars. Mine is a K Jet. There isn't supposed to be a fuse. A previous owner had the battery cable replaced with a local auto parts special which just has a main high amperage lead and a secondary low amperage lead. When it was installed it was butt spliced to the wire from the junction block next to the battery. I _assumed_ that somebody had removed the fuse because of various problems. So installed one. Big oops. 100% of the current, except for starting, for a K Jet car flows through that lead. Peak loads are 35-40 amps, or possibly more. Clearly a 25 amp fuse isn't going to have a chance.

Further examination of the wiring diagrams show that there is no fuse protecting the headlight and ignition circuit and a couple of others. My thought is to remove the fuse block I put in and replace it with a 50 or 60 amp fuse block. There are nice marine ones which take a Maxi-ATC. Any opinions on that? I hate the idea of un-fused wires running around the engine compartment.

Cheers,

--
Jim McCorison - '92 740 Wagon 156k






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