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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
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charging issue

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Old 02-25-2014, 12:43 PM   #1
Join Date: Jan 2006
Vehicle: 1989 ford mustang gt convertible
Location: arkansas
Posts: 31
Default charging issue

i have a stock 89 mustang guage reads about 3 to 4 marks from bottom put new battery and altinator is fine where should guage be at and if not charing right what could it be have all the stock pulleys and still has the smog oump on it thank you this is first ford owned
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Last edited by michaela8456; 02-25-2014 at 12:48 PM.
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Old 02-25-2014, 02:13 PM   #2
88 orangepeel notch
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Join Date: Mar 2010
Vehicle: 1988 notchback
Location: Wisconsin
Posts: 2,342

Since this is your first Foxbody, never ever trust the stock gauges for accuracy. Check with a decent multimeter and note where the dash gauge is reading for future reference.

Also, it's ok to use punctuation in your posts. Just easier for us old people to follow
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Old 02-26-2014, 09:14 PM   #3
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Join Date: Oct 2013
Vehicle: 1985
Location: WA
Posts: 15

As mention the gauge doesn't read accurate, use a millimeter touch the leads on the battery post they should read around 12.5 when the car is off. Now turn the car on and do the same thing if the charging system is working you should have a reading around 14.X. I was running into the same issue as my gauge reading was low to find out my voltage regulator was bad.
85 Convertible 306
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Old 02-26-2014, 09:14 PM
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