no power good battery and 80 amp fuse is ok also fuse from battery to fuse box is good 92 Toyota truck 4 cilynder
I would check the battery terminals for corrosion and the battery cable from the battery to the location on the frame or engine block. Sometimes if you remove the negative terminal and scrape it clean that might fix your problem. Another test would be to hook a set of jumper cables to another car known to have no problems. After hooking up the jumper cables and it runs fine, then you know for sure it is a ground problem.
Check your alternator...
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