I'm getting Honda prelude 4ws 1989 I got problem with alternator not charcing bater?
I'm getting Honda prelude 4ws 1989 I got problem with alternator not charcing bater?
1- First make sure you have a good battery, if you said the alternator is not charging the battery then recharge the battery with a charger and retest the battery before testing the alternator. Make sure the battery pass the load test. Make sure all battery/ alternator connections are clean and tight.
I don't know where you're at, but if you're living in the USA, you can bring both battery and alternator and any Auto Zone or Advance auto part stores will test it out for you, free of charge. Is the charging light on?
2- Next, check fuse # 12 (10A) in the under dash fuse box and # 37 (10A) in the under hood fuse box. Then if the fuses are good, disconnect the alternator connector, with the ignition switch on, there should be 12V between the IG (BLK/YEL) terminal and body ground, and between the S (WHT/GRN) terminal and body ground.
If there's no voltage, recheck fuse # 12 or you have an open in the BLK/YEL wire between the dash fuse box and the voltage regulator, or the WHT/GRN wire between the under hood fuse box and the voltage regulator. See the wiring diagram I've included below.
If there's voltage, then you have to do the "Full fielded" test and see which item has failed to charge the system: The alternator or the regulator. If you're living in the USA: This would be check by Auto Zone.
If you need more procedures to check or need more help then I'll need your E mail address so I can send the materials or more OEM wiring diagram to you. HTH
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