Alternator not charging?

JEFF DAUENHAUER

MEMBER
1990 FORD E-SERIES VAN
5.0L
V8
2WD
AUTOMATIC
160,000 MILES

Hello, I have the vehicle listed above Econo line E150 with an alternator charging problem. I have checked through wiring diagrams and as many people from O'Reilly's all the local auto parts stores, I've had a mobile mechanical credit without any success. At this time, I have uninstalled the old alternator to reinstall the new one at such time the wiring harness had vanished for the alternator. I'm not the one who ripped out the harness and therefore I have no idea where it went. I've had other people put their head in the hood looking for that Lucy harness without any luck at this point I tried to bypass and install the new alternator and use the field wire from the voltage box and wired up that way without any luck the alternator is not charging the battery still the car will start and run for a few seconds and then it turns right off. I haven't in a place where it cannot sit and it's going to be towed very soon if anybody could help me, I'm currently appreciate it. Thank you

1 Reply

JACOBANDNICKOLAS

MECHANIC
108,217 POSTS

Hi,

I went to the wiring schematics and found there are two different possibilities. One has an external and one has an internal regulator. I need to know which one you have so I can review the correct schematic.

Also, what do you mean when you say the wiring harness was gone? Do you mean everything is missing? Also, there are a couple of fusible links that may have failed causing a no-charge situation as well.

Let me know what has been checked and exactly what is left as far as wiring.

Take care,

Joe

See pic below.

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