Ranger won,t start with charger after headlights on all night. what is the problem?

Battery was probably discharged to the poi t of being damaged. An autoparts shop should be able to test and confirm this. It's possible that a battery conditioner type charger (which most stores have..MAY be able to revive it) chances are you will need a new battery.

Clean the cable connectors and posts of any corrosion. Dull posts can create resistance. You want a good connection not only on the positive post but also the negative post and connections. Mouse Pads Choosing The Best Pad For Your Computing Needs AmanStino

If you have a battery that is charged from a different vehicle, try to use it by connecting it directly to the cables after removing the existing drained battery. Jumper cables will not normally jump a dead battery as you have described. Once the engine starts, remove the battery while the engine is still running. The alternator will provide all current required to run the vehicle. Reconnect the original (drained) battery and go for a drive. Hopefully, you can do this during the day and without any auxiliary items (AC, radio or headlights, etc.) running.

Clean the cable connectors and posts of any corrosion. Dull posts can create resistance. You want a good connection not only on the positive post but also the negative post and connections. Cold weather can aggravate issues if the battery is old and in need of replacement. Hope this helps.

Yes,put charger on lowest setting or trickle charge to get it started charging again. don

Maybe the deep discharge on battery trashed it and now it will not take a charge. Sure the charger is working? Give it enough time to charge the battery - at least five hours.