New Alt Still voltage drops!

[knukonceptz 10+ year member]

It is very simple - Get a real voltmeter first and measure at the battery and at the amp- IF THERE IS A BIG DIFFERNECE you have a wiring problem. You ask us for advice and have others do the work - do the guys working on your car have a clue? Instead of paying someone that clearly is lost, spend $10 at home depot or radio shack and see what really is happening

Taxi - if you pound 24/7/365 yes, sooner or later your reserve will run out - it will take a VERY long time and all you need to do is for 30 minutes a month (one minute a day) is NOT have the stereo full tilt and the ALT would bring everything back up. My point no one is drawing 100% of the system 100% of the time they drive. Sure if we wanted to destroy our ears and our electrical system it could be done. Even with modifications - maintainence must still be performed. Just because you add a turbo to a car - does not allow you to go past redline of the motor.......

 

[helotaxi 5,000+ posts]

Fully agreed, but the fact that his voltage is dropping and staying low until he turns the volume down indicates to me that adding a battery won't fix the problem in this case. He is exceeding the capacity of the alt for whatever reason and adding a battery won't fix that.

 

[knukonceptz 10+ year member]

He certainly has an issue somewhere in his install that needs some professional attention.