airognol

I got my 2002 Honda Civic EX about two years ago, and I've always had a battery and alternator issue. I've replaced the Alternator about three times, and the battery twice. I'm thinking this is an electrical issue, I also replaced the ELD and the check engine light I was having went off, but the battery light still was on. The car drives fine, but when i have the headlights on and i try to roll down the windows I see the lights dim. I'm getting tired of having this issue as neither a new alternator/battery or eld has fixed the issue. I found this place on Google, and hope you guys could give me an answer.

ezone

This is probably normal.
Windows draw a lot of power, but only briefly.
If the car isn't killing the battery, it is fine. Keep driving it.




Or is this the current problem?The way you worded the post, I can't tell.

mikey1

test the battery voltage with the car running at idle....what is it?

airognol

The fact that I've replaced the alternator many times, and still have a battery light on is the issue.

ezone

Check wiring and fuses.

airognol

What should I be looking for more specifically? I'm not very good with cars.

ezone

Check Fuses #4 and 10 in the dash fuse box.

Voltmeter check for B+ at the blk/yel wire in the 4 wire plug at the alternator (KEY ON).

Visual checks of all the wiring in that plug and follow the wire harness as far as you can looking for physical damage.

Ohm meter check the remaining 3 small alt wires between the alt and the PCM (need wiring diagrams for that)

Service manual may have other checks to do at the 4 wire alt plug. Got a good service manual?

Everything else (battery warning light) is controlled by the PCM and the multiplex systems.