Mechanics

CHARGING SYSTEM

1989 Honda Accord

Electrical problem
1989 Honda Accord 4 cyl Front Wheel Drive Automatic 216000 miles

i have a 89 honda accord, it started having problems with a slow crank. Then he charge light came on. I had the battery tested, it had a bad cell. I replaced with a new battery but the charge light stayed on. A few days later, the the original problem of slow cranking came back. I tested the charge system and it was not supplying enough voltage to the battery. I removed the alternator and had it tested. Napa and 2 autozones said it was good. So I reinstalled but the problem continues. The charging system will not charge the battery. What else could it be?
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Toe_knee
February 16, 2010.




Check fuse no.8 10amp and fuse no.21 70amp in underhood relay block right side of engine compartment and fuse no.1 15amp in dash fuse box left side of instrument panel and also check the charge indicator. If all the above are okay have the computer tested


http://www.2carpros.com/forum/automotive_pictures/12900_h1_8.jpg

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Tiny
Rasmataz
Feb 17, 2010.
All the fuses are ok. I even checked for opens and shorts in the charge cable from the alt to the underhood fuse box. What should I have the computer checked for? Any specific problems? Could it be possible that Napa and autozone where wrong, and I should just buy a new alternator?

Tiny
Toe_knee
Feb 17, 2010.
Have you managed to solve the problem?

I have done pretty much everything you have done and while I was trying to track down the problem, I accidentally left fuse # 1 under the dash out when I started the car. It ran for a little while and then died. I put the fuse back, started the car and had good voltage at the battery. I thought the problem was solved and ended up getting stranded by the side of the road the next day. For some reason, it went back to not charging. I tried pulling the fuse again today, this time with the car running, then just before it died, I plugged it back in and had good voltage again.

Does anyone have any idea how/why this is happening?

Thanks much!

BTW: My car is a carbureted 1989 Accord LX - Auto w/ 113,000 mi.

Tiny
Emonkey
Mar 31, 2010.
Double check the wiring connectors and wire back to fuse no.1 its a come and go situation here

Tiny
Rasmataz
Mar 31, 2010.
I did manage to fix the problem. Turns out Napa and Autozone were wrong and the alernator had a bad voltage regulator. A new alternator is $100, so I bought one from a junkyard for only $30, to see if it did need a new alternator and the old one was bad. It was a risk but it was worth it. Now it runs just fine.

Tiny
Toe_knee
Mar 31, 2010.
Thanks for the advice, rasmataz, I will check the connectors and wiring again. I found a point where the white and blue wire coming from the voltage regulator (on the back of the alternator) goes to a harness and joins an almost identical white and blue wire that also comes from the engine somewhere, and I get a ground connection reading on that wire. The wire on the other side of the harness goes to the #1 fuse box, but I cannot figure out why there is a third wire involved - it does not appear on any of the schematics I have.

Toe-knee, thanks for letting me know what happened in your case. I have always suspected that it might just be that the bench test didn't catch the problem. If I can't find a problem with the wiring, I might just give it a try as well.

Tiny
Emonkey
Apr 1, 2010.

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