This might not be the right forum for this, but i know the most electrical savvy people are on this forum


Alright ill start off with a little description of the problem, and then state what Ive attempted to do to solve the issue. For a while now, Ive noticed my car being a little hard at starting, but i didn't really notice until this whole problem started.

I left my key on in my car while i was cleaning it out or something. Went to start it and the battery lost its juice. I kinda thought it was strange considering it never had this issue before. Anyways, threw a battery in it and it seemed as the problem was solved. Fast forward a week and i started getting the same hard starting. So tested the alternator and it was only reading apx. 12.5 volts at idle and did not increase when i revved it up or drove it. Replaced the alternator with 2 other units known to be good and i still have the same exact problem. The voltage is the same at the alternator, both wires to and from the fuse box, battery, and ignition switch.

What i have tried:
-Through hondata, i disabled both the ELD and the alternator control. Neither did anything.
-Every fuse in the entire car is good.
-Added a ground to the engine, and checked all old grounds
-bottom alt bolt (ground) is tight
-all fuse box plugs are there and intact
-i pulled both the charging wires out and inspected them
-battery light DOES come on when the key is turned to on

I'll update when else i try as i go along. Feel free to ask questions

 

Put a battery charger on the battery terminals, turn the dial to car start, then start the car. Does it start easier? If it does then you just have a regular cheap battery.

Otherwise you have a problem with cables, alternator, regulator, grounds, or others. More info on the voltage of alternator and battery during off, starting, and constant load would help.

 

I have to jump the battery to start it. when at idle, load, cruising it stays constant