'68 mustang charging system problem

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pimpstang18

New Member

Sep 22, 2004

43

0

0

FL

Jun 11, 2006

#1

• Jun 11, 2006

• #1

'68 mustang with a 302. charging system is only putting out 12.4 volts. alternater, regulator, battery are all new and working properly. fuses are good, all wires have contineuity, everything is grounded properly, belt is tight.....out of ideas, does anyone have any input to what the problem could be?

 

garystocker

Member

Jan 2, 2005

305

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17

New Jersey

Jun 12, 2006

#2

• Jun 12, 2006

• #2

how old is the battery?

If you battery is more than a few years old I would replace it. I've had wierd things happen to me because of bad batteries that read a full charge.

 

garystocker

Member

Jan 2, 2005

305

0

17

New Jersey

Jun 12, 2006

#3

• Jun 12, 2006

• #3

sorry

I see on second look you say the battery is new...

In that case you might have a short somewhere causing a ground loop when the car runs, limiting your charging.

 

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pimpstang18

New Member

Sep 22, 2004

43

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0

FL

Jun 12, 2006

#4

• Jun 12, 2006

• #4

ok, yea i guess we forgot to check for shorts, some of the wireing on this thing is pretty old and we have already replaced some bad wires. all the charging system wires tested fine for a signal but i didn't trace them down and make sure they weren't exposed anywhere along the harness, guess i'll do that this weekend along with a draw test....thanks.

 

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pimpstang18

New Member

Sep 22, 2004

43

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FL

Jun 12, 2006

#5

• Jun 12, 2006

• #5

garystocker, by the way that's a nice '68 you've got there. that's the same thing we're restoring, '68 hardtop with a 302. it's coming along nicely, the whole front end is done, engine bay is freshly painted, all the front end body work is finished, primed, and ready for paint. runs great now except for this little charging problem, still gotta do the interior and everything back from the cowl. should be on the road in a month or 2 hopefully if we work on it every weekend.