Tip & How-To about Chevrolet 2500

Find ing a short

One way to find if there is an electrical short or something that is making your battery dead is with a test light. To do this. you need to disconnect the neg cable at the battery and hook up a test light between the negative cable and the negative post of the battery. If the test light is lit up real bright than you have a drainage. Leave the test light hooked up and start pulling fuses{ one at a time} until the test light goes out. When the test light goes out, look in the owners manual to find out what the fuse controls ,to see if anything was left on.

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4 Answers

I have 92 Volo 740, new battery, alternator checked OK but it dies out overnight

it sound like you may have a parasitic draw.. its time to get out the multimeter and start probing for cirquits with a draw when the car is off

if you dont know how to probe for parasitic drains. or just want to make sure you do it correct. i reccomend checking youtube videos

heres a few suggested ones.

Nov 14, 2016 | Cars & Trucks

1 Answer

battery goes dead when car isnt even on

You have something drawing on your battery. disconnect the nevagative cable. hook a test light between the negative cable and negative battery post and pull fuses till the test light goes out. when the test light goes out you've found the circuit that's drawing down your battery. trace the circuit and look for a short to ground or if something on that circuit is staying on.

Feb 14, 2014 | 1996 Dodge Intrepid

2 Answers

Battery is draining dead. Even while driving.

Hello James White, my name is Andy and i will help you to fix your problem more likely is the alternator remember when you have i bad battery can cause a false test on the alternator so my advice will be to make sure that the battery is fully charged and then get a multimeter and with the car on and a/c on and headlight on connect it and make sure is more than 12.80 volts and no more that 14.0 volts, you can get one of this multimeter in the closest walmart for 20 bucks i had lot of cases when people test the alternator the wrong way that why is better yo do it yourself :D WANT SOMETHING DONE THE RIGHT WAY DO IT YOURSELF

Jan 03, 2014 | 2001 Kia Rio

1 Answer

1999 fored F250 diesle battery's keep going dead

Did you disconnect both batteries then check for a draw ?
If you use a test light between one negative cable and the battery post, and the light glows, you have something on the truck that is drawing current when everything should be off.

May 04, 2013 | Ford Cars & Trucks

2 Answers

new battery keeps going dead.i exchanged later it went dead had alternator checked and it is ok

WEll, something is causing the issue.... First, fully charge the battery, then disconnect the negative and put a volt meter or test light in series (between the terminal and the cable). Disable interior lights, and test for draw of current.
Essentially, if the light lights, too much current is being drawn out of the battery. So, you disconnect fuses, and other items until the light goes out. This should help you find the offending component.

IF no light lighting, perhaps the battery itself has issues. Leave it disconnected overnight, and see if it is discharged...If yes, the battery would be suspect.

There are diodes in the alternator that fail and can cause voltage to be drained. Some tests to the alternator fail to reveal the fault. the best test is an Scope, but you can isolate diodes and test with continuity tester.

Feb 04, 2011 | 1999 Ford Escort

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