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Tech & Fab
'90 Ford truck charging system
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<blockquote data-quote="NotMatt" data-source="post: 996755" data-attributes="member: 15947"><p>Troubleshooting ideas here... do these trucks have a fusible link somewhere or a charge fuse that I'm missing? The alternator tests "good" by the parts store, but the battery light is on and the volt gauge reads real low, but sometimes will jump up to what I would consider "normal" while driving (battery light doesn't go out).</p><p></p><p>obviously the alternator's not charging as I've got a little under 12v at the battery posts while running.... I've checked and cleaned all the terminals between the battery and the alt (alt output hooks to one side of starter solenoid post). </p><p></p><p>This just happened earlier today after I washed the truck (not the engine bay)... maybe coincidence, as I can't figure out what else it could be... would a short somewhere cause this kind of behavior? Are these externally or internally regulated (I can't find an external regulator unless I'm not looking hard enough?).</p></blockquote><p></p>
[QUOTE="NotMatt, post: 996755, member: 15947"] Troubleshooting ideas here... do these trucks have a fusible link somewhere or a charge fuse that I'm missing? The alternator tests "good" by the parts store, but the battery light is on and the volt gauge reads real low, but sometimes will jump up to what I would consider "normal" while driving (battery light doesn't go out). obviously the alternator's not charging as I've got a little under 12v at the battery posts while running.... I've checked and cleaned all the terminals between the battery and the alt (alt output hooks to one side of starter solenoid post). This just happened earlier today after I washed the truck (not the engine bay)... maybe coincidence, as I can't figure out what else it could be... would a short somewhere cause this kind of behavior? Are these externally or internally regulated (I can't find an external regulator unless I'm not looking hard enough?). [/QUOTE]
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