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3 days ago · It's one leg of the 3-phase alternator raw AC output. The Voltage Regulator looks at this so it can tell if the alternator is spinning, so it won't engage field current if the alternator isn't spinning. "F" is the Field control line. Controlling current into this line will control how much output current is desired from the alternator.
4 days ago · When testing the alternator with a multimeter, you're looking for two things: the voltage output and the amperage output. The voltage output should be between 13.5 and 14.5 volts. If it's lower than that, then the alternator isn't charging the battery correctly. The amperage output should be between 30 and 40 amps.
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3 days ago · To further diagnose the alternator, you’ll need to test its output. With the engine running, use your multimeter to measure the voltage between the alternator’s positive terminal and a good ground, such as the engine block or a bare metal surface. The reading should be between 13.5 and 14.5 volts.
4 days ago · The other terminal is the battery condition sensing one. To keep your alternator from overcharging your battery, run a wire from this terminal to the hot post on your battery. This allows the regulator inside the GM alternator to sense the battery state and adjust the amount of amperage output to keep from killing your battery.
OEM alternator on your vehicle is around $515 at a dealer. Labor is around $400 -$500. Add a new belt, shop supplies, taxes and the price can get very high. Shop around and find another mechanic, because $1800 is way too expensive.
4 days ago · Quote from: bytejunkie. the wire youre calling a sense wire is the wire that powers the red light on the dash to warn of a low voltage condition either on the battery or alternator side of things. it is NOT the wire that feeds the rev counter. Thats fed from the coil and will typically be green or red w/ black.
4 days ago · Here we will be looking at and changing the battery cables on a 1993 6.5 to PT Wiring Solutions very heavy duty 2/0 cables. The directions show how to install on a later model with the alternator on the other side, which worried me a little at first, but it all went ok.
