Often it's an alternator diode. Check the battery first. When batteries start to go bad they can often start to discharge over a couple hours. Take it to an auto parts retailer and have them test the battery and alternator for you. I had the same problem with my '92 Windom (ES 300). It was a faulty trunk mounted CD changer that was draining the battery.
Without seeing the 1991 Lexus es250, it is impossible to know exactly the cause of the fuel pump problems. A mechanic will be able to look at the car and let you know whether it is a bad pump, relay, or a clog.
Dead cell in the battery or the ignition or lights were left on.
A dead cell in the battery will cause it to loose it's charge overnight. The only fix is to replace the battery. Also if something is on drawing power from the battery it will run it down overnight. Look at all lights. Interior, under hood, trunk, give box, brake lights, etc. It can also be a stuck relay.
Yes, IF the ignition SWITCH was left ON. I suggest charging the battery, and then have it tested at Autozone both of which are free.
Bad starter... Bad Alternator... Bad battery... maybe a fuse.
No, a fuse cannot cause a battery to not hold a charge. However a dead cell in the battery will cause it to run down overnight. Also there may be something on that is drawing power from the battery. Under-hood light, trunk light, dome light, glove box light, etc. Also a stuck relay will drain the battery.
bad ignition switch, bad battery, bad alternator/regulator,
It won't. Look for a light that is on or a stuck relay. Also a dead cell in the battery will cause it to run down overnight.
A dead cell in the battery itself will cause it to drain overnight. The battery must be replaced if it has a dead cell. Also any light that is on will cause this. Brake, dome, under hood, trunk, glove box, etc. A relay that is stuck closed is another cause.
Yes, it could. If the battery gets too low it may not start.
A dead cell in the battery will cause it to loose it's charge overnight. The only fix is to replace the battery. Any light that is staying on will drain the battery. Also a stuck relay will drain the battery.
You either have a battery that has a dead cell and needs replacing or something is on pulling power from the battery. Can be any light on the vehicle or a stuck relay. In rare instances a defective alternator can cause this.
A battery that runs down overnight is normally caused by a dead cell in that battery. The only fix is to replace the battery. It can also be caused by any light that is left on, on the vehicle. Dome light, under hood light, trunk light, glovebox light, or even brake lights that our on due to a sticking brake light switch. A relay that is sticking can also cause this. Disconnect the negative battery cable and let the vehicle sit overnight. If the battery is still charged the next morning then you know the battery is good. If the battery is dead then you know the battery has a dead cell and must be replaced.
It can be any light in the car. Dome, glove box, trunk, under hood, etc. It can also be a relay that is stuck closed. It can also be a dead cell in the battery which will cause it to loose it's charge overnight. Have the battery tested at anyplace that sells batteries.
A dead cell in the battery will cause the battery to loose it's charge overnight. The battery must be replaced if this is the case. Also, any light that is on will drain the battery. A stuck relay will also drain it. Disconnect the negative cable at night in the dark and if you see a spark of any size then something is on. You will see a very tiny spark which is normal but look for a spark that show a large power draw.
Almost anything. On newer model vehicles, the engine's computer drains the battery constantly, as does the stereo. Short circuits can cause a drain. Any electrical system that is left on will drain the battery. Even a disconnected battery will lose charge over time and the older the battery, the faster it drains. Also a battery with a dead cell will discharge itself, usually overnight.
Have you had the alternator tested? Often a bad internal diode can drain the alternator overnight.
No, a starter cannot cause a battery to fail to charge. It could cause the battery to discharge quickly.
check battery cable connection to see if loose.could also be a drain on battery,check to be sure all accessories were turned off overnight. Just a few days ago my caddy would not start. the battery checked out ok, but the alternator was bad. diodes were bad causing an "open loop" in electrical circuit which drained battery. To check alternator, first fullycharge battery, take to local parts store (autozone will check it for free)this can be done with alternator on running engine. Good luck!
Either the battery has a dead cell which is draining it or, something is on which s drawing power.
Computer modules are supposed to "go to sleep" about 15 mins after you shut off the vehicle. If they don't, they can drain the battery. See related links on how to find the bad module. The battery itself may have a dead cell which will cause it to drain overnight. If that is the case the only fix is to replace the battery even if it is a new battery. It may also be you have light that is on pulling power from the battery. Under hood, trunk, glove box, dome light, brake light, etc. You could also have a relay that is sticking.
If you're sure the battery is ok (sometimes they can short out and draw down the charge) you might want to test the alternator to see if it has bad diodes.
I'm not sure if this may be YOUR problem but when I was having my battery discharge on me, I ended up disconnecting the passengers electric seat. Again, I'm not even sure if that was the problem or if it's your problem either, but it seemed to work for mine.