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Message: [QUOTE="Snake, post: 356651, member: 97"] ****UPDATE**** Ordered a 220a unit from DB Electric and installed it Friday evening......aaaaaaand I'm still at 12v or less on the ScanGuageII. Began troubleshooting and here's where I'm at: -- Still reading 12v or less off the threaded stud on the back of the alternator -- Battery light comes on with KOEO, and goes out when I start the truck (voltage is around 12.6 - 13.0 at idle after the glow plugs finish their cycle) -- Disconnected batteries and each read 12.3v (keep in mind I haven't re-charged the batteries since the night of the problem) -- With everything connected, I'm reading 0.3v from the threaded stud on the back of the alternator to the positive terminal of the passenger battery, so I know I'm not losing voltage across that wire) -- I unplugged the three pin / two wire connector from the alternator, started the truck, and check for voltage on both pins: 11.74v on one, and 12.0v on the other -- Double checked all the fuses in the engine and under the dash again, just in case As of now, the only two things I haven't checked are the amp output of the alternator and load tested the batteries. Other than these two things, what else could I be missing? [/QUOTE]

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