battery light is on
Joined: Feb 2004
Posts: 2
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From: Lubbock, Tx
Re: battery light is on (JimBlake)
I have the same prob on my 96 prelude. I have gone through 3 alternators and 2 baterries. I just recently put an optima battery and it drained it too! I have no amps just a dvd player with a screen hooked up. i can charge the battery and the car will run for about 2 hours and the battery will be dead. when i took it to autozone and oreillys the autozone showed only 21 amps at 2000rpm but the oreilly one showed 45 amps at 2000. either way i have replaced both the bat and alt and still continue to have this problem... any ideas? I ahve checked wires and grounds. Does any one know the schematic for the charging circit i would like to energize the alternator at all times and have bypass the eld...
Ezra
Ezra
Honda-Tech Member
Joined: Jan 2003
Posts: 8,132
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Re: battery light is on (compeell)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by compeell »</TD></TR><TR><TD CLASS="quote">... Does any one know the schematic for the charging circit i would like to energize the alternator at all times and have bypass the eld...</TD></TR></TABLE>Charging circuits usually aren't that complicated, try finding a shop manual for your year. In particular, what rpm to hold & what to measure to check the charging system.
Don't be so quick to blame the ELD. That just tells the ECU what the loads are, so it can anticipate what it needs to do with the IACV & alternator to hold the idle steady. Canada cars don't even have an ELD, & I think their alternator control still works the same way.
You want to check the alternator's circuits. The F terminal is a charging rate signal to the ECU. The ECU controls the alternator through the C terminal. I think you should make sure those are intact & connected properly.
In particular, make sure the alt. C circuit isn't shorted to ground. The ECU turns off the alternator by shorting the alt.C wire to ground.
Don't be so quick to blame the ELD. That just tells the ECU what the loads are, so it can anticipate what it needs to do with the IACV & alternator to hold the idle steady. Canada cars don't even have an ELD, & I think their alternator control still works the same way.
You want to check the alternator's circuits. The F terminal is a charging rate signal to the ECU. The ECU controls the alternator through the C terminal. I think you should make sure those are intact & connected properly.
In particular, make sure the alt. C circuit isn't shorted to ground. The ECU turns off the alternator by shorting the alt.C wire to ground.
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