2002 sub. battery goes dead every night i can put it on charge for 15-20 min.the next morning and it starts right up and runs fine everything works battery charges up park it for the night and same thing the next morning dead nothing works until charged 15-20 min starts right up again Help! please

Fuel pump

I have similar problem different vehicle, my ignition was not connecting well and the glow plugs were not initially getting properly hot, not sure how to fix it/ I disconnected the battery entirely and unplugged what I could and switched # 1 for #3 plug and waited overnight and charged the battery out of the truck, next day put all back and attached battery and started right up right since , so try take out battery and charge better first.

OK, have you check is the charging system is working correctly? The alternator should be charging the unit. Does you battery hold power(12.5V Minimum)? If the problem is not the charging system, check for Fuel issues. Does the gas pump delivering fuel to the EFI/Carburetor? Also try to clean the spark plugs and check if the ignition coil is working correctly.
Basically your wagon problem sounds as if it is Ignition/fuel issue. If it turns on then dies means that either there is spark issue or gas issue. Not enough fuel goes into the combustion change and it gets cut off right after turning on.

Battery is shot

check for loose / dirty ground wires and points
indicates a voltage circuit being broken and the ECM is loosing voltage to work

The charging system (alternator ) is not working ! Your best bet would be to take it to a qualified repair shop

If you live where it is cold, your battery may need to be replaced . They will discharge with the cold during the night. Try changing the battery or checking your curent one. Install a known good battery that you know is fully charged, start the car and then turn it off leaving it for the night. If it does not start in the morning then you know it is not the battery. More than likely the alternator or regulator.

It could very well be a defective battery, you could have 1 or more bad cells in the battery. A voltage regulator or an alternator. If it isn't one of those then there is something drawing power from somewhere that is causing it to go dead.

Has the stereo been changed recently? If not move to the cigerett lighter. These two are most likely the prob. But you could have a bare wire anywhere grounding out. Good luck and hope you find it.

you meant its a NO CRANK engine.
silent starter, say the word silent.
even the starter relay must click.
and if head lamps die, so will be the starter.
due to a dead battery,
sounds like a bad battery to me. dead or only
DISCHARGED.
if the Charge/battery lamp is off in the cluster driving. its ok. the alternator.

starter car with the jumper cables connected
and not next day.
only live jumps matter. or you go know where.
if you want to walmart they have tool there that
tests the alternator
battery
and for phantom drains all in 6 min work, the tool does all the work.

if the battery is charged, it will crank I bet
its discharging.
for 1 of 3 reasons.
1: its bad.
2: the charge system is dead.
3: phantom drains, it goes dead as you sleep
the head lamps dead is the big clue there.