I just wanted to pass on some tool advice, these are tools we actually use in our fleet. I know this is not the best tool for checking your alternator and batteries. But if I don't have a multimeter with me this tool works great. Plug into a cigar lighter -Engine off - indicates battery state of charge -Engine running - indicates alternator condition (low voltage conditions, normal or over charge). http://purkeysfleetelectric.com/page.php?6 This is the best tool for checking alternators and batteries. This tool also check the cables from the batteries to the starter and alternator.
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