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Three tests 98% guarantee correct Diagnoses
Find the main power conector at the back of the alternator.
Get a Volt Meter that can be adjusted to read 15 Volts.
Test battery voltage at posts and From Negative post to Back of alternator. Should read the same give or take 0.05 Volts. Should have 12.2 to 13.2 volts just siting. If it does not, have the battery charged and tested first.
Start the Truck, turn on headlights. Do measurments again, Readings should be Low 14 volts to High 13 Volt range. Try raising RPM to 1500
If it can not maintain High 13 volt range it has a problem. Install replacement.
What else can I help you with?
What else will stop a Chevy Tahoe from starting?
There are several things that can keep a Chevy Tahoe from starting including the starter being bad, a dead battery, an alternator, or a fuel pump.
Why won't your 97 Chevy Tahoe start after sitting for 3 days?
There can be many reasons why a 1997 Chevy Tahoe will not start after sitting for three days. Reasons include a dead battery, a bad starter, a bad alternator, a loose wire, and no gas.
What would cause multiple batteries to go dead after only 30 days on a 1999 Chevy Lumina?
could be your alternator
Timing for a 95 Chevy Tahoe?
ZERO at TDC./ Top DEAD CENTER
What is killing the battery on a 97 Chevy Tahoe It will crank with a boost but after driving for a little while every thing goes dim and it shuts off?
Sounds like the alternator has failed. Can also be a couple of dead cells in the battery, or loose or corroded battery cables.
What makes a 1990 Chevy s10 go dead while you are driving?
You may need a new alternator and or battery.
Why would you lose all power in your 2000 Chevy impala?
alternator could have gone out running the battery dead.
Why won't my 1999 LHS wont stay running after a jump start?
bad alternator, dead battery.
Why does your battery keep draining on your 2000 Chevy Monte Carlo?
Defective alternator, loose alternator drive belt, dead cell in battery, or something is on pulling power from the battery.
Why doesnt your keyless remote work for your 2002 Chevy Tahoe?
Your keyless remote might not work for your 2002 Chevy Tahoe because the battery in the remote is dead. You can replace this battery by prying the remote cover off of the back of the remote or by removing the screws holding the cover closed.
98 Chevy Tahoe you have top dead center but your dist-rotor is pointing to7 what do you do?
wire that as number one or pull dist. and fix.
The Volt light is on in 1999 Monte Carlo and it will not start?
Dead or weak battery? Alternator not charging battery properly?
