Battery light on & battery draining

Asked by Hocuspocusfocus Aug 25, 2019 at 02:26 PM about the 2002 Ford Focus SE Wagon

Question type: Maintenance & Repair

I have an 02 Ford focus DOHC 2.0 that has
battery light on & dying quickly.  Has new
battery & alternator & new terminals
installed.  I am about to run a wire directly to
the alternator from the battery & pray it
solves my issue, but any insight would be
greatly appreciated.  Thanks

3 Answers
40,085

beatupchevy answered 5 years ago

I'll bet there's already a cable going from batt. to alt. You have a serious short that needs to be found , replacing parts is not trouble shooting a problem .

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Ericman1967 answered 5 years ago

DO NOT RUN A STRAIT WIRE TO BATTERY! YOU MAY BYPASS THE VOLTAGE REGULATOR AND OVERLOAD BOTH! YOU HAVE AN ISSUE THAT NEEDS TO BE TRACKED. If you have a new battery that is fully charged that runs out quickly, go to local parts store and have battery and alt checked. They usually do it for free. A new battery can run a car for some time without being charged by the alt. It's not unheard of to have gotten the wrong size battery or a bad alt from part stores, I have had both happen in my life! If that does not pan out and you feel the car is worth having a diagnostics check, usually 50 dollars for electrical check go there. After 1980 models exspecialy 2000 and above it's not wise to bypass regulators or sensors with jumpers!

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lincolnscott49 answered 5 years ago

Do a draw test with a 12 volt tester light or a volt meter . Find what is drawing down down the battery

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