When it comes to electrical problems, nothing is sacred, nothing is impossible. So you could have anything at all drawing the system, including an internal short in the battery itself. I would start with the battery, but discnnecting it froim the car, and see if it stays charged overnight, or if it drains. On the car, you can use a 12 volt test light to check for draws on the car by disconnecting the neg battery terminal and putting the test light in-line between the cable and the battery. You will need to touch the cable to the post for 15 minutes and then take it away from the battery, while not breaking contact with the test light so the GEM module will "go to sleep." Then, if the light is illuminated, you have a potential draw. Keep in mind that a 3 0r 4 MA draw is normal for radio, GEM, and PCM keep alive memory. f the draw is excessive, start unplugging fuses until the draw goes away. Yo can eliminate the draw to a sub-system that way. Then once you have found the sub-system involved, you can put the fuses back, and start unplugging modules and componets within that sub-system, until you find the culprit. also it could be brake light switch bad(at the brake padal),brake lights staying on
not charging the battery properly... check the alternator.
Normally it means the alternator is failing.
There is a battery light above the engine temperature gauge
I have a 2.0 1995 Mercury mystique the battery charge light was on no output on old alternator. Replaced alternator No output from new alternator "charge light out" (wiggle test wires& re-check wires) at alternator *still no output* is there a fuse that could be the problem or just another bad alternator... I would check the alternator plug before getting another alternator, it may be bad. And is a lot cheaper to replace.
let the car run and then pull the negative battery cable off. if the car stalls, the alternator is bad! do you know where the bank 1 o2 sensor 2 is?
check your timing belt
Check engine light usually indicates a problem in the emission control system - have vehicle scanned to determine the problem
replace battery or alternator
Follow the + battery cable should connect to relay
the whole cable or just the cable ends ??????????????
Possibly a bad alternator. The Alternator charges the battery when the vehicle is running. If the battery is not being charged this could cause the vehicle not to start.
Get the alternator checked before your battery goes dead.
under the left side dash and under hood by battery
Usually on the lower end of the engine follow the + battery cable to the solenoid and then to the starter
I can tell you that on a 2000 mercury cougar it is a fuse on the positive cable between the battery and the alternator
Have the charging system checked. Possibly loose or corroded wiring, a loose alternator belt, or a bad alternator.
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alternator and battery. You may also have a battery drain (something that is staying on and killing the battery)
Needs new alternator.
Possibly defective alternator.
Anyplace that sells batteries has this info.
A bad alternator will have the effect of draining the battery, resulting in dim lights, trouble starting the car and the like. It would be best to replace the alternator as soon as possible and possibly obtain a new battery. This may vary depending on how much the bad alternator has drained it. You can get your alternator and battery checked any time at Auto Zone.
Defective alternator or voltage regulator. Also possibly the battery is defective with a dead cell.
dead cell in the battery or something is on pulling power from the battery.
You possibly have a loose alternator belt or the alternator is weak. Check the voltage at the battery with the engine running. It should be 13.5 ? 16 volts. Any less and the alternator is weak and needs replacing. Also make sure the connections at the battery are clean and tight.
Anyplace that sells batteries can tell you the correct size. Take the old battery with you as you will have to trade it in or you will pay a core charge.