Check the fusible link between the alternator thick red wire and positive terminal of the battery with the battery disconnected. If that's OK, compare the non-running battery voltage to the running battery voltage and see that it is about 12.7 volts not running and 13.7 to 14 volts running. If you don't see the higher voltages when the engine is running, your alternator is not producing the required charging voltage. At that point you need to determine if you are getting the field voltage to the alternator rotor which is the smaller wires on the alternator. The voltage will vary with the charging demand and electrical load on the system. These voltages come from the engine control module. The belt is turning the alternator, right!
SOURCE: 98 PLYMOUTH GRAND VOYAGER WONT START - BLOWS ENG FUSE - HELP
You have a shorted engine harness, this is not common but it does happen, heat and engine movement cause damage to the harness, this is most common on hi miler cars and vans, the only way to fix it is to start by looking anywhere the harness rubs, that is where the damage occurs.
SOURCE: altenator is not charging the battery
sir , the altenator has 3 wires at the connector correct ? a white/red , a green/white and a black , the white/red wire is involved with a 10 amp fuse to do with the charging meter / gauge , the fuse located behind left side of dash .. the green/white wire is is involved with 2 fuses , a 10 amp ECU fuse and a 25 amp Main fuse located at left rear of engine compartment main box , and the black wire is involved with a main 80 amp fuse at the main box also . both of these 2 wires end up at the positive side of the battery , please verify all these fuses are good . if they are indeed good , then open wiring would be next step verify continuity on black and the white/green wires . i would post a link to diagram but autozone repair info site is down at this time . if ya need more help , please ask .
SOURCE: 2002 ford windstar states check charging system
voltage sensing circuit could have a problem, if the sensor is bad that senses the voltage coming from the alternator or battery it will set this warning off, follow the wires from the battery and alternator untill you find what looks like a little module or a clamp around either the negative or positive battery wire or alternator wire. see if the vehicle reacts when the module or sensor is moved around a bit
SOURCE: 1996 BMW 328 IC Convertible Altenator ok but not charging battery
Sounds like the alternator may be missing an excitation current source.
Check the 'IGN' dash indicator lights when you turn ignition switch on prior to starting motor,
if not one of the below may be problem:-
1) check exiter control wire is connected to alternator D+ terminal (low current wire, +V with Ign on),
2) replace dash 'IGN' indicator lamp.
SOURCE: 2002 ford windstar check charging system light
Check all fuses, both inside and outside. Use a volt meter to check the output of the alt., by setting the meter to D/C/ volts, put the black wire on battery GROUND and the red wire on the big terminal of the alt.,,, which the wire is held on with a nut and washer, or a lock nut.If your reading is around 12.0 - 12.6,,, try another alt....
If the reading is 13.8 - 14.6 ,, you have a problem between the alt and the battery.
Hope this helps.
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