In what sewuence do i hook up my 4 taotso 12v 20ah batteries

Try a normal charge at your mechanic he can also tell you if you have a bad cell.

Here is the way to hook them up in series, or in parallel.
There are 3 batteries in top (series) pic, but a 4th would be added in same wiring manner. Disregard the letters "ve" in diagrams, but the +/- polarity is vitally important in hookup.
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Note that four 12v batteries hooked up in series will be 48 volts at the end terminals. (If all four are hooked up in "parallel" then the total would still be 12 volts).

If you want to supply a 12v inverter, you need to hook 12v batteries in PARALLEL.

most battery jumps starters I have used use a gell cell 12v battery depending on size of box (space available) . jump starter box has either 1 or 2 or more X12v 17ah battery sometimes they are 12v 20ah .if 2 or more batteries they are wired in parallel to achive higher starter current . I start a 2.7 diesel with one that only has 1X12v 17 ah gell cell.If you open box up it will be obvious what battery (s) it uses.

Just found this while looking for instructions. Didn't find any, so I figured it out. There are two black pegs in the bottom. Slide a flat head screw driver under them to pry them up. There is a phillips screw in each of the corners. Just shine a flashlight in to see which side has the head. Once you pull those 4, there is a 5th phillips screw hidden under the center sticker on the same side. Pull the sticker up and pull that screw. The last thing is a pair of clips on the top edge; just slide a flat head screw drive under the now-loose cover at one of the top corners and slide it down to pop the panel off. Batteries in mine are 2x RT12200 12v 20AH batteries.

Specs Volt 12 Amps 22 Length 7.13 Width 3 Height 6.57 Terminals NB Weight (17.5) Manufacturer Universal Power Model # UB12220 Universal 12 Volt 22AH Battery UB12220 Universal 12 Volt 22AH Battery
Specs Volt 12 Amps 20 Length 7.126 Width 2.992 Height 6.575 Terminals NB Weight (14.56) Manufacturer Panasonic Model # LC-X1220P Panasonic 12 Volt 20AH BatteryLC-X1220P Panasonic 12 Volt 20AH Battery

join them in parallel if there all 12 volt you could just charge the 1 battery with 12 volts and that would charge them all but all the other batterys have to be in series you cant do it if u have 2 24 volt batterys they all have to be 12 v

No, very unlikely that the battery has anything to do with this problem

When you changed out the battery, did you remove the fuel tank completely or just prop it up??

There are two fuel lines (supply,return) and an electrical connector for the fuel pump that must be disconnected when you remove the tank.

I would suggest taking a close look on the RHS of the tank near the seat and ensure that the fuel pump connector is properly seated and that the fuel lines are properly connected.

Good Luck!

Make sure that the manual brake release/freewheel lever is enaged as if it is not, this will allow you to push the scooter, but will not engage the drive motors. It is usually located on the rear of the vehicle; check your owner's manual.
If this does not work, contact the manufacturer for additional troubleshooting.
Good luck!

I would replace the gearbox, but it is a specific little tikes gearbox. If it is making a grinding noise, then the gears have broke.
You can find them at this website
http://www.shopjandl.com/884931300.html. I would just let them know what model it is and you should be good to go.