Alternator Replacement? Help!

Hi iamharleyguy,

ALTERNATOR
Removal
1. Ensure you have the anti-theft code the radio. Write down the frequencies for radio's preset buttons.
2. Disconnect the negative cable from the battery.
3. Remove the adjust plate mounting bolt "A", locknut "B" and mounting bolt "C". Remove the Power Steering (P/S) pump belt "D" and pump without disconnecting the P/S hoses. See Fig. 9 .
4. Disconnect the 4 pin connector "A" and alternator cable "B" from the alternator. See Fig. 10 .
5. Loosen the adjusting bolt "A", and remove the lock bolt "B" and mounting bolt "C". Remove the alternator belt and alternator. See Fig. 11 .

Fig. 9: Removing Alternator Components Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig. 10: Disconnecting 4-Pin Connector Alternator Cable From Alternator Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig. 11: Removing Alternator Alternator Belt Courtesy of AMERICAN HONDA MOTOR CO., INC.

Try this-get a voltmeter read the battery open voltage before you start vehicle record it-reading must be 12.4 volts or better. Now start vehicle put headlights/heater On-record readings it should be 13.5-15.5 volts do you have this.

In order to help you, we need to know what seems to be the problem. Please explain, in detail, the problem that you are experiencing. Also, what prompted the alternator replacement at the beginning? Did you bring the "new" alternator to get it bench tested at an auto parts store? Don't leave anything out.

Hello my name is Dave.

First thing I would check would be the ground cable, I have encountered a more than average rate of failure with the ground cables on Honda's. While it is a simple fix it can cause symptoms that don't seem that simple.

An easy test to see if this is an issue is to take a set of jumper cables and attach one black to the engine making sure it makes good contact, and take the other and attach it to the ground on the battery and see if your voltage at the battery increases while it's running. If it does replace the ground cable and that should resolve your problem.

If you find this doesn't resolve your problem I would test the alternator.
Here is a link to our tutorial on testing it:
https://www.2carpros.com/articles/how-to-check-a-car-alternator

Please keep in mind that even though you bought a "new" alternator it could still be faulty (most at the parts store are actually rebuilt)

Please keep us up to date on your progress and thank you for using 2CarPros!