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1999 Honda Civic alternator/charging system

Tiny
MATTSCHULTZ
  • MEMBER
  • 1999 HONDA CIVIC
  • 4 CYL
  • FWD
  • MANUAL
  • 90,000 MILES
My friend has gone threw 3 batterys and 3 alternators in the past couple weeks. We ran all new positive and ground wires checked all the fuses, and relays, took out the SRS and wireing harness to see if there was any bad wires. With no luck we are out of questions. It is a modded car with alot of power over the stock B16 though. His fuel pump is bad could that be doing it?
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Tuesday, December 2nd, 2008 AT 12:35 AM

4 Replies

Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
If the fuel pump relay is jammed and keeping the pump running constantly this could be flattening the battery?
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Tuesday, December 2nd, 2008 AT 9:19 AM
Tiny
MATTSCHULTZ
  • MEMBER
  • 6 POSTS
Yea would seem that way. I think that is the last thing we tried but we will shoot fo it again.

Would it still cause the battery to not get charged to?
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Tuesday, December 2nd, 2008 AT 10:44 AM
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
The battery should still get a charge while engine is running. But as soon as you turn engine off. Something big draining the battery will not take long to sap it? Start engine. Put a voltmeter across battery terminals. You should get a reading of between 13 and 14 volts into battery from alternator. If your not getting near 13 volts it's not getting an adequate charge from alty. Check wires etc. On alternator or put voltmeter positive lead to alternator B+. And negative lead to battery negative again you should get around 13 plus volts, if not, the alternator is not working
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Tuesday, December 2nd, 2008 AT 1:21 PM
Tiny
MATTSCHULTZ
  • MEMBER
  • 6 POSTS
Yea did that on the first night. And tested it again! We now have torn out the whole dash and are going threw every peice of wire there!
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Wednesday, December 3rd, 2008 AT 11:25 PM

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