When using the l298n to create a car the "OUT" pins on the l298n are not receiving any voltage. Using a multimeter I checked this and voltage is at VCC and GND, and all of the "IN" pins on l298n however to make the motors move the "OUT" pins are connected to the motors. However it is not getting any voltage which is not allowing the circuit to work.
You seem to have connected the 5V pin from your Uno to the 12V pin on the l298 board?
Normally you would supply 12V from a power supply to the l298 board and then you can optionally supply 5V from the 5V connector of the board to the 5V pin of the Arduino.
Wow! Lots of wires. Where are they all going? Please update your wiring diagram. A schematic would be best, but at least with your wiring diagram we could see what was connected to what.
4x AA rechargeable will be around 4.8~5V. Not enough for the 7805 regulator on the l298 board to output 5V, maybe only 3~3.5V. That won't be enough to run an Uno reliably.
By the way, why are you using an Uno? I don't see any kind of "shield" in your pictures. A shield is a PCB with the same form factor as Uno and fits on top of the Uno. If you are not using a shield, an Uno is not very convenient at all, especially if you want to use breadboards,!
I would always recommend to use rechargeables wherever possible, for the health of our planet.
4x AA non-rechargeables would be around 6V, still not enough for the 7805 regulator to make 5V. But you might get 4.5V from it, which would probably power the Uno ok.
