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Just as the title says. I bought and tested a new battery and alternator and the car still won’t charge. The battery’s maintain 12v after charged but as soon as
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#1 (permalink) |
Base Member
Join Date: Jul 2020
Location: Los Angeles
Posts: 25
Drives: 2010 Nissan 370z
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Just as the title says. I bought and tested a new battery and alternator and the car still won’t charge. The battery’s maintain 12v after charged but as soon as I turn on the car the volts drop to 11 and keep dropping till the car eventually dies. Again the alternator DOES work and the I did a parasitic drain test and nothing seems to be draining the battery. What else can it be?
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#2 (permalink) |
A True Z Fanatic
Join Date: Aug 2013
Location: Shawnee KS
Posts: 5,698
Drives: 15 Magma Red 6MT
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Your best bet will be the FSM, (link in my sig). I suspect there is a fuse/fusible link at or near the block of stuff that is by the positive terminal of the battery, that is shot. Good luck.
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#3 (permalink) |
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Join Date: Aug 2020
Location: Louisville, KY
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Do you have any aftermarket electronics? stereo? additional lights?
Just to be clear, with a charged battery or a jump, the car will start right? And the gauge shows it charging at 14 ish volts? |
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#5 (permalink) |
A True Z Fanatic
Join Date: Aug 2013
Location: Shawnee KS
Posts: 5,698
Drives: 15 Magma Red 6MT
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There are 3 fuses you need to check. One is a 140A fuse at the battery, the other is a 100A fuse near it. The third one is a 10A that comes off terminal 3 of the alternator. Page CHG-14 of the FSM has the info. Do not rely on visual inspection, take a ohm meter and check resistance. All three should be under 1 ohm. My bet is on the 10A fuse for terminal 3 of the alternator.
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#7 (permalink) | |
A True Z Fanatic
Join Date: Aug 2013
Location: Shawnee KS
Posts: 5,698
Drives: 15 Magma Red 6MT
Rep Power: 2684377 ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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Go to PepBoys or whatever autoparts store is in your area and ask them to do a battery & alternator check. It's usually free, at least it is in my part of the country. ![]()
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