jaros44
1/2 ton status
hey does anyone know the brown wire coming out of the weather proof plug on a gm alternator. is it suppose to be hot along with the red wire coming into the alternator. thanks
jon
jon
CK5
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alternator wire
- Thread starter jaros44
- Start date
what year??
If your talking about a 73-87 alternator,the two wires on that plug AND the big red one in the rear that has a stud and nut should ALL have 12V when the motor is running,or with the key "ON" and the motor off...
The brown wire delivers 12V to the feild coil in the alternator,to "energize" it,and make it charge--you need current to MAKE current!..if it gets no voltage,it wont charge..period..
The other small red wire on the plug sends 12V to the regulator,it needs to be "hot" too,or it may not charge,or charge at an improper rate..
If your talking about a 73-87 alternator,the two wires on that plug AND the big red one in the rear that has a stud and nut should ALL have 12V when the motor is running,or with the key "ON" and the motor off...
The brown wire delivers 12V to the feild coil in the alternator,to "energize" it,and make it charge--you need current to MAKE current!..if it gets no voltage,it wont charge..period..
The other small red wire on the plug sends 12V to the regulator,it needs to be "hot" too,or it may not charge,or charge at an improper rate..
