Battery and brake lights

MOST LIKELY LOW VOLTAGE TRIGGERED IT

A LOT OF TIMES GAUGES START GOING CRAZY TOO, AS THE NON-CHARGED BATTERY STARTS DEPLETING

YOU GONNA DO THE REPAIR YOURSELF?

A FRIEND?

A PAY SHOP?

THE MEDIC

Depending on how the diagnostic tests were done there's more than just saying it's a bad generator. Before you stick a new one on and have the same problem, measure the voltages on the two test points on the back. If you find 0 volts on both, you have a blown fuse. If you find full battery voltage on one and 0 volts on the other, replace the brush assembly. That can usually be done without removing the generator from the engine. I'm pretty sure you have to buy a new voltage regulator to get the brush assembly that's attached to it.

If you find full battery voltage on one test point and less, but not 0 volts on the other one, that part of the circuit is working. In that case measure the voltage at the output terminal with the engine off and with it running. That will tell us where to go next.

GO LOOK AT THIS....I TRY TO HELP, EVERY WHICH WAY I CAN

SEE MY 7th AND 8th ANSWERS IN THIS POST

https://www.2carpros.com/questions/1977-jeep-cj7-front-wheel-wont-into-4-low

I HAVE DONE THIS 3 TIMES IN THE LAST 3 WEEKS MYSELF---4 OTHER FRIENDS DID THIS TOO.....I HAVE SAVED $120 ALTOGETHER.......THE CODE DOES NOT WORK ON OIL PRODUCTS....I DON'T KNOW WHEN IT EXPIRES

LET ME KNOW IF YOU'RE GONNA BUY MY LUNCH NOW!

THE MEDIC

13.5 volts is a fuzz too low unless the battery was run down, and that's what 12.2 volts indicates. Low engine speed will aggravate that. Part of the test procedure involves raising engine speed to 2000 rpm during the load test. However, 13.5 volts proves the generator was working. Ideally the voltage should be between 13.75 and 14.75 volts but that quarter volt isn't the cause of a problem.

There's a number of ways a generator can fail, and given the warning light turned on, yet the 13.5 volts says it was charging while it was being tested, but dropping to 12.3 volts suggests it can't keep up with demand. That's the result of one defective diode of the six. That will reduce its maximum output to exactly one third of its rated output current. Replacing diodes isn't easy or cost-effective, especially if the generator is under warranty. All of your observations suggest simply replacing it will be the end of the story.