Why won't my battery charge
Thread Starter
Joined: Nov 2003
Posts: 266
Likes: 1
From: Mid Mo.
Car: 1989 GTA - Gunmetal grey
Engine: 5.7 ltr.
Transmission: 700R4
Axle/Gears: 3:27 9 Bolt Borg Warner
Why won't my battery charge
New battery, new alternator...Get 12v on the battery + terminal on the alternator, but my voltage is only reading 11 volts in the dash. Should be 14 volts. Could it be the gauge ? Checked all grounds, headlights, relays, engine ground strap, hatchback pull down. Ground off battery to block is good and tight.
Stumped here...Any recommendations on what to check will be appreciated.
Thanks in advance.
Stumped here...Any recommendations on what to check will be appreciated.
Thanks in advance.
Supreme Member
Joined: Jan 2009
Posts: 2,313
Likes: 115
From: belle fourche,s.d.
Car: '82 z28
Engine: L83 5.7
Transmission: 700r4-1985
Axle/Gears: 3.42 posi
Re: Why won't my battery charge
only 12v at battery with engine running?-that is way low,should be around 14v with engine running.
Supreme Member
Joined: Jul 2007
Posts: 1,293
Likes: 5
From: Howard Lake, MN
Car: 86 Camaro
Engine: 355- hopefully a 5.3 this summer
Transmission: 700r4
Axle/Gears: 3.42
Re: Why won't my battery charge
do the cars with gauges also have an "alt" or "volt" light?
if so, is it on with the key on and engine off?
if the light doesn't come on, then check the bulb. that bulb is inline on the circuit that activates the alternator and if the bulb is burnt out, it won't charge.
if it doesn't have that light, are you getting power to the brown wire on the alternator plug with the key on? if not, that's your problem. could be an ignition switch problem.
if so, is it on with the key on and engine off?
if the light doesn't come on, then check the bulb. that bulb is inline on the circuit that activates the alternator and if the bulb is burnt out, it won't charge.
if it doesn't have that light, are you getting power to the brown wire on the alternator plug with the key on? if not, that's your problem. could be an ignition switch problem.
Supreme Member
Joined: Feb 2008
Posts: 1,004
Likes: 1
Car: 90 IROC
Engine: 5.7 TPI
Transmission: 4L60
Axle/Gears: 3.23
Re: Why won't my battery charge
do the cars with gauges also have an "alt" or "volt" light?
if so, is it on with the key on and engine off?
if the light doesn't come on, then check the bulb. that bulb is inline on the circuit that activates the alternator and if the bulb is burnt out, it won't charge.
if it doesn't have that light, are you getting power to the brown wire on the alternator plug with the key on? if not, that's your problem. could be an ignition switch problem.
if so, is it on with the key on and engine off?
if the light doesn't come on, then check the bulb. that bulb is inline on the circuit that activates the alternator and if the bulb is burnt out, it won't charge.
if it doesn't have that light, are you getting power to the brown wire on the alternator plug with the key on? if not, that's your problem. could be an ignition switch problem.
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