Question about Cars & Trucks
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Posted on Jan 02, 2017
SOURCE: Battery will not hold a charge.
I don't know how you figured out that your battery was good, but if it drops to 9 volts I highly suspect that it is bad. You need to have it load tested. This will tell if it is bad under load.
Also if it is bad it can cause the alternator not to work even if the alternator is brand new.
Posted on Dec 04, 2008
First check alt At The Back of Alt Big Red Wire Were hooks to Post (stud) Do you have voltage ?? How Much??
What Voltage do you have at same Place with Engine Running ??
Now At wires Were they plug into Alt ,Top. Wires in White Plastic Clip, Do You Have Powe With Key On ?? How Much Voltage??
Jump across the 2 in the clip (with Engine Running)ONLY TEMPORARY!! Do You Have Voltage at Battery ?? How Much??
If Over 13volts With Clip On (Jumped) You Need A Internal Voltage Regulator ..
Is Batt Light On on Dash ??? Theres A Lot Of Testing You Can Do !!! And I will Need More Infomation to Keep Going ... These are just some Possible Problems No Way In Depth ...
Could Be a Number of things Or May be Just as Simple As a Blown Fuse, Dirty Batt Cables ETC etc etc I Hope It Puts You On The Right track !!!!!!!!!!
Posted on Jan 07, 2009
Did you test the Alternator on or off the truck? It might be a problem with the control system to the Alternator. The regulator need a battery feed to work, It is usually ran through an alternator fuse.
Posted on Mar 11, 2009
Check all your fuses if you had a system failure it could have blown a fuse. I am not sure on your vehicle where the fuse is in the car or under the hood it could also have a relay. You can check your alternator by checking the voltage at the back of the alternator where the big wire bolts on. You should have 14+ volts at the alternator.
Posted on May 24, 2009
check battery voltage when you turn off car. it should be 12.5 volts.if drops 11.0 volts the battery is got a weak cell in it.i bought a sears die hard battery it last 2 years the battery had a defect .it had a bad cell it short out the battery.check alternator wires for defects.
Posted on May 29, 2009
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