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Unread 07-17-2010, 09:44 PM   #1
B_Mabus
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1994 XJ Cherokee 
 
Join Date: Jun 2007
Location: Pa
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Battery will not charge - what is the issue?

ok so i left the gf drive my jeep. she told me it died. went to get it confirmed it. jumped it found out it was only running on the battery, well my instinct was an alternator. replaced it charged battery up to 12.5 volts. started it volt meter was low. so i check the output of the alternator. 30 volts dc....how is that? checked the voltage at the terminals of the battery 12.3 and slowly decreasing. so i tested the terminals at the voltage regulator. 7.5 with the ignition on and running im getting 11.5. is my pcm bad? telling the alternator to charge more than it should ever do? i checked all the fuses on my power distribution block. if there's anything im over looking please help.

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'90 XJ 177,xxx WHITE....sold
'90 XJ 153,xxx RED...wip
'94 XJ 145,xxx WHITE...current ride

Nothing runs like a Renix
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Unread 07-17-2010, 09:45 PM   #2
B_Mabus
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1994 XJ Cherokee 
 
Join Date: Jun 2007
Location: Pa
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btw this is a 94 cherokee 4.0
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'89 XJ 183,xxx BLACK with olive drab....parts jeep
'90 XJ 177,xxx WHITE....sold
'90 XJ 153,xxx RED...wip
'94 XJ 145,xxx WHITE...current ride

Nothing runs like a Renix
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Unread 07-17-2010, 09:49 PM   #3
BassMasterCHS
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Grounds clean?
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Unread 07-17-2010, 09:49 PM   #4
Holder350
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Sounds like you are not getting a connection from the ALT to the battery....there are 60 amp fuses in the PDC for alternator output.
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Unread 07-17-2010, 09:59 PM   #5
B_Mabus
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Ok will check both out. Thanks guys im a tech in training for Ford and im good on electrical but when it comes to my own stuff i throw the towel in too easily
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'89 XJ 183,xxx BLACK with olive drab....parts jeep
'90 XJ 177,xxx WHITE....sold
'90 XJ 153,xxx RED...wip
'94 XJ 145,xxx WHITE...current ride

Nothing runs like a Renix
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charging system , alternator problem , battery issue

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