Bought new parts, but volts are still low.

Former4banger · January 18th, 2012, 10:37 PM

I replaced my alternater, battery, and battery terminals but my volt meter is still reading really low. Any thoughts or suggestions?

OHC230 · January 20th, 2012, 09:30 AM

First a question. How low is the voltage? A good way of isolating this problem is by starting at the power source working your way out. Disconnect the battery cables at the battery and check the voltage, then do the same with the alternator disconnected, then pull all of the fuses from the fuse box and replace them one at a time to look for a power drain. I suspect you have a bad ground or a partial short somewhere in the electrical system. Try isolating the various system and re-post if you don't find the problem.

1993MustangNotch · January 23rd, 2012, 04:03 PM

Yep I was gonna say bad ground. Do what he said ^^^ check everything.

4themasses · February 28th, 2012, 02:00 PM

Does your "AMP" light turn on when you first turn the ignition on? My AMP bulb was out creating a voltage issue. The SVO instrument cluster is special to the charging system in that if that bulb is out, you will get about 12V.

Had the same issue, did some diggin around and that was the issue...back up to over 14v.

January 18th, 2012, 10:37 PM	#1
Former4banger Regular 1992 2.3l lx hatch Join Date: Jul 2010 Location: Salem, OR Posts: 105 iTrader: 0 reviews	Bought new parts, but volts are still low. I replaced my alternater, battery, and battery terminals but my volt meter is still reading really low. Any thoughts or suggestions?

January 20th, 2012, 09:30 AM	#2
OHC230 Enthusiast Supercharged 89'/ 85' SVO 11.945 @ 119.6 Join Date: Jan 2010 Location: Napa Valley CA Posts: 879 iTrader: 0 reviews	First a question. How low is the voltage? A good way of isolating this problem is by starting at the power source working your way out. Disconnect the battery cables at the battery and check the voltage, then do the same with the alternator disconnected, then pull all of the fuses from the fuse box and replace them one at a time to look for a power drain. I suspect you have a bad ground or a partial short somewhere in the electrical system. Try isolating the various system and re-post if you don't find the problem. __________________ Supercharged 2.7L 398 HP 501 ft lb !!

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January 23rd, 2012, 04:03 PM	#3
1993MustangNotch Regular 1993 Mustang LX 2.3L N/A Join Date: Jan 2011 Location: Boynton Beach, FL Posts: 51 iTrader: 0 reviews	Yep I was gonna say bad ground. Do what he said ^^^ check everything.

February 28th, 2012, 02:00 PM	#4
4themasses Newbie Join Date: Feb 2012 Posts: 5 iTrader: 0 reviews	Does your "AMP" light turn on when you first turn the ignition on? My AMP bulb was out creating a voltage issue. The SVO instrument cluster is special to the charging system in that if that bulb is out, you will get about 12V. Had the same issue, did some diggin around and that was the issue...back up to over 14v.

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