Alternator/charging issues

[Street Sweeper22]

That is part of circuit number 2 if you take the wire harness apart it will have a crimp and solder splice with a 12Ga wire going to the Blower motor relay, another going to the firewall connector to inside the car and another going to the battery cable on the starter and that one to the threaded post on the back of the alternator.

Circuit number 2 has another fuseable link that goes from the battery cable at the starter to the firewall connector.

Thank you, I tried looking at the wire diagrams on Malibu racing but my brain doesn’t work like that. This really helps.

 

[Street Sweeper22]

So my alternator crapped the bed. I put a new one in and it’s only charging at 12.3v. When I shut it off it goes down to 11v. Is that from the battery getting drained from the bad alternator? Should it charge higher than that even with a bad battery or low battery?

 

[Built6spdMCSS]

That's a bad cell in the battery. Time for a new battery.

 

[Street Sweeper22]

That's a bad cell in the battery. Time for a new battery.

Yeah, I’ve only had it a month and it’s an optima red top. I remember when these batteries were bulletproof!

 

[Street Sweeper22]

Gm G-body electrical troubleshooting supplement says this:

View attachment 217439

Hope it helps you Street Sweeper22

That’s pretty cool. Do you have one for the dash lights? My dummy lights are the only thing that works on my dash.

 

[ck80]

That’s pretty cool. Do you have one for the dash lights? My dummy lights are the only thing that works on my dash.

Try these combined they cover the needle gauges, and, lights. I *think* maybe its what youre asking after?

What I like about the dealership docs is they list the pieces of the car as reference points, not just colored wire paths.

Some of them it looks like it was getting dark down the shop overflow building. Lights bulb was out 15 ft in the air, not easy to change on the fly.

 

[g0thiac]

Yeah, I’ve only had it a month and it’s an optima red top. I remember when these batteries were bulletproof!

Do a test before calling the battery out.

Not that Optima doesn't suck now haha.

So check first, because in fact a shitty alternator you can disconnect the cables while it's running and it will quit.

But if it's the battery, pulling that hard of a drop on your charging circuit, once you disconnnect it from your alternator it technically should start generating current man 😎💪💪💪

 

[abbey castro]

So that little black cylinder is a fuse able link?

Fusible link not fuse able. 🙂

 

[Street Sweeper22]

Try these combined they cover the needle gauges, and, lights. I *think* maybe its what youre asking after?

What I like about the dealership docs is they list the pieces of the car as reference points, not just colored wire paths.

View attachment 217483
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View attachment 217485
View attachment 217486
View attachment 217487

Some of them it looks like it was getting dark down the shop overflow building. Lights bulb was out 15 ft in the air, not easy to change on the fly.

I appreciate these. If it warms up a little bit I’m going to work on it today.

 

[Street Sweeper22]

Do a test before calling the battery out.

Not that Optima doesn't suck now haha.

So check first, because in fact a shitty alternator you can disconnect the cables while it's running and it will quit.

But if it's the battery, pulling that hard of a drop on your charging circuit, once you disconnnect it from your alternator it technically should start generating current man 😎💪💪💪

So if I disconnect the negative cable it should die if it’s a bad alternator? Technically