Hi there i have a 2004 ford taurus ses 24 valve dohc the ...

Q: Hi there i have a 2004 ford taurus ses 24 valve dohc the car will run for about 30 minutes than it will shut off had the alternate

asked by on October 18, 2017

Car will run for a little while like 40 minutes than after turning it off the battery is dead and will not start just the other day it turned off while driving for a few miles while i was at a stop and it had been ideling for a few minutes battery tested good alternator tested good voltage regulator tested bad but isnt the voltage regulator in the alternator ? Starting motor also tested bad could that drain a fully charged battery that fast ?

My car has 180000 miles.
My car has an automatic transmission.

Hi Craig. Thanks for stopping by tonight. If your battery is draining quickly, it’s likely one of two issues. Either you have some loose or faulty charging system connections (from the alternator to the battery) or you have a parasitic battery drain. This occurs when an accessory or vehicle system that is powered by the battery when the engine is not started, but switches to the alternator after, has an open or stuck relay or fuse. This will cause the component to continually draw power even if the key is not in the ignition. The voltage regulator is a separate component that is a part of the alternator system, but if it has failed, this could also be the source of your problem. It might be best to have a professional mechanic come to your location and complete a battery will not hold a charge inspection, so they can pinpoint the root source of this problem.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Car stays in accessory mode with key out.

In your circumstance, unless you have a "retained power accessory mode", obviously the components running off the accessory mode circuit are being powered at some point. The usual procedure is to trace the circuit using the factory wiring diagram in...

why does my motor move side to side when the truck is running ??

An engine that moves side to side in the engine bay can be commonly caused by defective motor mounts. If the motor mounts wear out or break, they will not be able to properly secure the motor in the engine...

Flexplate cracked

This is a common failure on your vehicle. Typically this occurs because the torque converter bolts come loose, or if the transmission was ever removed and the bolts were not torqued properly this will happen. The only way to repair...

Related articles

The Best Used Cars to Buy for Families
If If it’s time for you to search for the top used cars specifically for families, check out the list we’ve put together of the top five. The list of must-haves Typical items that families are looking for in their...
The Best Used Cars to Buy If You Just Retired
Here’s Here’s a cruel, hard fact – car manufacturers no longer target seniors. Instead, they devote their time and energy to appealing to the 18-45 demographic. Still, some features make certain cars more suitable for older drivers. We have...
Understanding Ford Intelligent Oil-Life Monitor (IOLM) System and Lights
Car symbols, or dashboard lights, are a car service reminder. The Ford Intelligent Oil-Life Monitor indicates when and what service your car needs.