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96 civic with 91 crx hf stock engine -- mixing alternator to ecu wires

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Old 09-03-2011, 02:54 PM
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Default 96 civic with 91 crx hf stock engine -- mixing alternator to ecu wires

what would happen if i mixed the two wires that lead to the ecu: white/yellow and blue?
at the moment it seems my car will only charge for a few mins on a cold start then stop, even when i rev it over 2k rpm my volts never goes above 14.3
my car:
91 honda crx hf stock engine with 96 civic obd2 ohio 170amp high output alternator installed.

Last edited by suoabb; 09-11-2011 at 02:15 PM. Reason: sticking with rules
Old 09-03-2011, 02:56 PM
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Default Re: mixing alternator to ecu wires

Why? Did you do it?
Old 09-03-2011, 03:00 PM
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Default Re: mixing alternator to ecu wires

What did happen?
Old 09-03-2011, 05:22 PM
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Default Re: mixing alternator to ecu wires

did it send a 100 amp or more the wrong way melting all the wires??
Old 09-08-2011, 02:10 AM
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Default Re: mixing alternator to ecu wires

yeah i mixed the two wires going to the ecu. white/blue and white/yellow. don't know what kinda damage it can do... all i know is my alternator will only charge when i initially start it then stop after a few min.
Old 09-08-2011, 03:30 PM
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Default Re: mixing alternator to ecu wires

battery and alternator checked out good when i got it tested yesterday
Old 09-11-2011, 12:24 PM
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Default Re: mixing alternator to ecu wires

anybody....any ideas?
Old 09-11-2011, 12:35 PM
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Default Re: mixing alternator to ecu wires

Provide all pertinent information about your car and engine:

Old 09-11-2011, 04:16 PM
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Default Re: mixing alternator to ecu wires

i edited some info on first post but can't change the title.
Old 09-11-2011, 10:12 PM
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Default Re: 96 civic with 91 crx hf stock engine -- mixing alternator to ecu wires

It puts out 14.3V for a couple minutes, and then drops? Drops to what?
Old 09-12-2011, 05:50 AM
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Default Re: 96 civic with 91 crx hf stock engine -- mixing alternator to ecu wires

it'll drops down to 12v and my battery light will come on and i'll rev it up a bit but the battery will go up to mid 13v sometimes 13v.
Old 09-12-2011, 05:57 AM
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Default Re: 96 civic with 91 crx hf stock engine -- mixing alternator to ecu wires

You probably fried the voltage regulator inside the alternator. Have the alternator tested. It's probably bad.
Old 09-12-2011, 06:56 AM
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Default Re: 96 civic with 91 crx hf stock engine -- mixing alternator to ecu wires

i did have it checked out at o'reilys and it pass all three test that they run 3 times
Old 09-12-2011, 01:03 PM
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Default Re: 96 civic with 91 crx hf stock engine -- mixing alternator to ecu wires

if the regular of the alternator was fried the alternator should of fail those test they run at auto shops.
i will try the one wire alternator method and see if it output 14+volt charge.
could i have fried my ecu?
Old 09-12-2011, 01:17 PM
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Default Re: 96 civic with 91 crx hf stock engine -- mixing alternator to ecu wires

even when i turn the ac on my volt will stay the same at around 12.3v even though my eld volt goes from 3.2 to 1.7v (reading done on red/green wire at eld and a ground).


wish i didn't throw my old alternator away
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