Friend Samuel I disassembled it from the circuit and when I put the positive tip of the multimeter on pin 1 all the other pins give infinity, when I place the negative tip of the multimeter on pin 1 on pin 2 of 394 and the others give infinity by placing the multimeter In diode or continuity measurement I also just measured a 3.3 k power resistor that is on pin 4 is open does not give measurement
An then change that resistance and try it so when stopping the str is fine no leg should measure zero if it is not short comment how you go