1996 Toyota Tacoma either stalls or acts like stalling when running electrical.

Hello, Test the function of your idle air control valve. There are videos showing how to test it online, and describing the testing procedure would be a daunting task. The idle air control valve is controlled by the engine control module, and has to raise the idle when additional loads are placed on the engine. If it does not idle up, you have the situation you described. Since it works sometimes, I bet you have a loose or corroded wire somewhere in the circuit. You can likely solve this issue with some patience, a multimeter, and the repair manual for your truck. Let me know if you need additional guidance.