Using 100 amp mopar alternator to charge batteries out of a vehicle
A regulator and alternator are wired as above. After your 7.5 HP engine is started, a switch is used to connect the two --> connections at top. The battery (+), is connected to the output post of alternator. The battery (-), is connected to alternator body and regulator body.
The regulator "I" terminal senses the battery voltage when switch is closed, and terminal "F" goes low to energize field if voltage is too low, and increased alternator output. If you measure "I", to ground with voltmeter when running, and voltage is around 14V, the regulator is good. If the battery voltage is higher than that, then measure the voltage between the battery (+) and the "I" terminal. If wiring is good, there may be less than 0.1V, if more than that, you have poor wiring, or bad connection in switch or terminals. The other place to measure voltage is battery (-) to regulator case, that should be near zero, if not, that may also result in high battery voltage, because the regulator is fooled by the ground voltage loss.
A regulator and alternator are wired as above. After your 7.5 HP engine is started, a switch is used to connect the two --> connections at top. The battery (+), is connected to the output post of alternator. The battery (-), is connected to alternator body and regulator body.
The regulator "I" terminal senses the battery voltage when switch is closed, and terminal "F" goes low to energize field if voltage is too low, and increased alternator output. If you measure "I", to ground with voltmeter when running, and voltage is around 14V, the regulator is good. If the battery voltage is higher than that, then measure the voltage between the battery (+) and the "I" terminal. If wiring is good, there may be less than 0.1V, if more than that, you have poor wiring, or bad connection in switch or terminals. The other place to measure voltage is battery (-) to regulator case, that should be near zero, if not, that may also result in high battery voltage, because the regulator is fooled by the ground voltage loss.