Can replaced alternators go bad in 6 months - I need to replace it again!

Yes is can if it tests weak these guides will help us with instructions on how to replace the alternator in the diagrams below.

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

and

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

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Good afternoon,

Is the light on for the alternator?

There is a ELD or electronic load detector in the fuse box that is a common failure for not charging.

I attached a diagram for you. Check and make sure there is power to the unit and a ground.

In most cases, it is a blown fuse in the fuse box caused by a failing alternator.

Roy

You are welcome.

Always glad to help.

Roy

Scan for codes it may be a bad speed sensor or wires melted there

I fyour service light is on then take to an auto parts they do it for free.

Hi StephenCCC,

You got a 6 cylinder engine?

You must do it from under the car. Id suggest getting it on jack stands, remove drivers wheel and the splash shield, you will be surprised how much access this will give you. Once you have it unbolted you must twist and turn alternator to snake it out through the bottom. Not too difficult of a job. I hope this helps

Check for loose generator belt, charging resistance too high, defective generator, loose generator ground wire, corroded battery terminals or faulty generator

Turn ignition on.
If CHARGE warning light illuminates, go to next step. If CHARGE warning light does not illuminate, check for blown fuse No. 15 (7.5-amp) in instrument panel fuse/relay block. Check for blown charging system light bulb.

If fuse and light bulb are okay, repair open in White/Blue wire.

Start engine.
If CHARGE warning light does not turn off, go to next step. If CHARGE warning light turns off, perform generator/regulator test. See

Ensure ignition is on. Check voltage between generator 4-pin connector terminal No. 1 (Black/Yellow wire) and ground. If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Black/Yellow wire between generator and instrument panel fuse/relay block.

Turn ignition off. Disconnect generator 4-pin connector. Ground generator connector terminal No. 3 (White/Blue wire). Turn ignition on. If CHARGE warning light illuminates, go to next step. If CHARGE warning light does not illuminate, repair open in White/Blue wire between CHARGE warning light and instrument panel fuse/relay block.

Remove ground from generator connector terminal No. 3 (White/Blue wire). If CHARGE warning light turns off, test and repair generator components. If CHARGE warning light is still illuminated, repair short to ground in White/Blue wire

Hi marievel,

Just simple hand tools.
10, 12, 14 mm hex spanner.

Hi toddmanz,

Thank you for the donation.

Remove the master cylinder holding bolts and pull it outwards to gain additional space to get the alternator out. Be careful not to damage the brake hoses by bending them too abruptly.