alternator going out
just got an LS1 and..now i think alternaters goin out Ok..i went out to a dead battery..i figg'd no big deal i left my fuzz buster on...so i charged it drove it around..and the guage..for the battery inside the car slowly went down til it hit yellow then it kicked my amp and my cd player off...i got my current tester out and tested battery it was at like 11.94..with the charger on it...then i started the car and turned the charger off and it was at like 10.24..and dropping...
I think my alternater bit the bullet..my dad said something about sometimes they come unplugged is this true..
Also how much will this put me under a new alternater and how hard is it to install?
I think my alternater bit the bullet..my dad said something about sometimes they come unplugged is this true..
Also how much will this put me under a new alternater and how hard is it to install?
TECH Addict
Joined: Feb 2004
Posts: 2,826
Likes: 0
Originally Posted by msbz_ls1
Ok..i went out to a dead battery..i figg'd no big deal i left my fuzz buster on...so i charged it drove it around..and the guage..for the battery inside the car slowly went down til it hit yellow then it kicked my amp and my cd player off...i got my current tester out and tested battery it was at like 11.94..with the charger on it...then i started the car and turned the charger off and it was at like 10.24..and dropping...
I think my alternater bit the bullet..my dad said something about sometimes they come unplugged is this true..
Also how much will this put me under a new alternater and how hard is it to install?
I think my alternater bit the bullet..my dad said something about sometimes they come unplugged is this true..
Also how much will this put me under a new alternater and how hard is it to install?
11 Second Club
Joined: Jul 2003
Posts: 2,311
Likes: 2
From: loudoun county,va
lossen tentioner,
take off 2 bolts holding it on, unsnap connecters in back, slip out of belt , replace with new one and do in reverse....
20-30 mins tops
advance auto part number P82425
$128 bucks
$75 core charge.
Lifetime Replacement Warranty....
take off 2 bolts holding it on, unsnap connecters in back, slip out of belt , replace with new one and do in reverse....
20-30 mins tops
advance auto part number P82425
$128 bucks
$75 core charge.
Lifetime Replacement Warranty....
Last edited by jaberwaki; Feb 24, 2005 at 12:05 AM.
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make SURE you unplug the weather-tight connector that will plug into the top on the backside while its still attatched. its got one TINY red exciter wire coming out of the connector and they like to rip out 
if it does, you can take the connector apart and "fix" it like i did, as have 10,000 others.
if it does, you can take the connector apart and "fix" it like i did, as have 10,000 others. LS1 Tech Stories
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There are a lot of electrical loads attached to the BAT
line that will draw current if they get defective. Alternator
rectifier packs can be damaged and leak back; check this
with the engine off (key off), disconnect the alternator
power wire and check current; any reading there is bad.
If there's no back-leakage in the alternator, disconnect
the + cable from the battery, attach a shorting strap to
reconnect it and put the ammeter across it, then detach
the shorting strap (all this, just to not throw the surge
load from power-up through the 10A meter fuse). Watch
the amps. See if there's a draw; if so, start pulling fuses
until you see it drop or disappear; note the ones that make
a difference, to chase down that branch later.
If you see the battery voltage declining but no external load
then you have to think shorted cell, self-discharge.
My Delco battery (like some others') developed a leak at the
side posts. Check yours.
line that will draw current if they get defective. Alternator
rectifier packs can be damaged and leak back; check this
with the engine off (key off), disconnect the alternator
power wire and check current; any reading there is bad.
If there's no back-leakage in the alternator, disconnect
the + cable from the battery, attach a shorting strap to
reconnect it and put the ammeter across it, then detach
the shorting strap (all this, just to not throw the surge
load from power-up through the 10A meter fuse). Watch
the amps. See if there's a draw; if so, start pulling fuses
until you see it drop or disappear; note the ones that make
a difference, to chase down that branch later.
If you see the battery voltage declining but no external load
then you have to think shorted cell, self-discharge.
My Delco battery (like some others') developed a leak at the
side posts. Check yours.
TECH Regular
Joined: May 2004
Posts: 474
Likes: 0
From: chicago
i swapped mine with a 200amp unit this weekend.
3 bolts, 2 long ones up front and one short bolt in the back.
theres a weathertight plug with one red wire, and then the alt to battery cable which on my stocker was a royal pain in the *** to get off since the whole bolt would spin instead of the nut just holding the cable on.
not hard at all to replace, just make sure you got enough room under the car to work with.
3 bolts, 2 long ones up front and one short bolt in the back.
theres a weathertight plug with one red wire, and then the alt to battery cable which on my stocker was a royal pain in the *** to get off since the whole bolt would spin instead of the nut just holding the cable on.
not hard at all to replace, just make sure you got enough room under the car to work with.