Alternator not charging

Hello,

It sounds like you have a fuse out here is a the wiring diagrams to show you what to check for power and which fuses run the system please check it out and get back to us.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (Below). Please let us know what happens.

Cheers

Hello,

This sounds like it could be a CD stuck in the player can you hear it running when the car is off?

This guide can help

https://www.2carpros.com/articles/car-battery-dead-overnight

Please let us know what you find. We are interested to see what it is.

Cheers, Ken

Check the connections to your alternator make sure they are not corroded.

Next buy a cheap test light and check the connections at the alternator for 12 volt power.

Third if these two are fine then you have a short in the system some were.

Before the third step try the first two and get back with me. Then we will go over the third step more closely in detail.

Richard

CHeck the connections on the side of the fuse box under the hood. Wiggle the wiring as you go to check for shorts. Next (if you have not already checked the battery connections do so 4 corrosion and tightness) CHeck 4 loose or corroded grounds.

Sounds like you have a bad connection.

______________________
I try to answer questions as though it were my car, like I’m standing in your shoes looking to diagnose the problem.

Measure the voltage on the output terminal when the engine is off. You should find battery voltage there. If it's 0 volts, the fuse link is open but that's not going to be a 20 gauge wire. That will be closer to a 10 or 12 gauge wire.

If you have battery voltage there, measure the voltages on the other wires and holler back.

UGGGHHH! I just looked up your generator and I see it's the one with two output wires plugged into the side of the case. That is quite the design. That plug is supposed to never be disconnected. Doing so will degrade the terminals and lead to them overheating and failing. Replacement generators come with that plug already installed. You are supposed to cut the wires and splice the new ones to the car's harness.

The fact the battery warning light goes off when the engine is running proves the generator is working. Close to half of battery voltage will appear on the white wire when the unit is generating an output. That tells the regulator to turn the light off.

Back-probe one of the black / orange output wires to read the voltage while the engine is running. If you find between 13.75 and 14.75 volts, it's working. Measure the battery voltage next. If it's lower, near 12.6 volts, current isn't getting back to the battery. Look for a fuse link that's burned open.

If you find 12.6 volts or less at the output wires, those terminals have burned up. The repair will consist of trying to clean and shine them up and replacing the connector. If that repair fails, you'll need to replace the generator.

Doc,

We had similar problems with my pap's 86

Turned out to be the connector at the voltage regulator was not making good contact. It's a real crappy connector that ford used forever.

It's been a long time, I think I used a teeny-tiny crescent wrench (i keep in my pocket, along with a miniature channel lock pliers, reversible screwdriver, and pocket knife!). Anyway I slightly bent the terminals down the row, to pressure against the other half. It's sorta obvious, what to do!

Maybe this helps, maybe not. Thought i'd sling it out there anyway!

The medic

Hello, external regulator? Did you check for voltage at the alternator bat terminal, also terminal A at the regulator, where applicable? If nothing there, a problem with the wiring circuit. You need to make sure the battery has a full charge and the cables/wires are clean and tight on both ends.