A: Pin 1 = Red, Pin 2 = Black, Pin 3 = Blue, Pin 4 = Yellow/Green (GND). Refer to the specific ZJSF-120-12V wiring diagram for aviation connector models, as Pin 4 might be Brown.
Key specifications typically include:
Attach a small 16 AWG wire from the center ground terminal of the control pins to the contactor's mounting bracket or a clean chassis ground spot.
"I spent 3 hours staring at the ZJSF-120-12V diagram trying to figure out why my voltmeter read 0V. The diagram shows AC inputs on the left, DC on the right. What it DOESN'T show is that the screw terminals are reversed on the cheap AliExpress version. I wired L/N as pictured and blew the input fuse. Flipped L/N, it worked perfectly. The diagram is a suggestion, not a fact."
Connect the on the relay to the battery positive (+) post . It is essential to install an appropriately rated inline fuse (e.g., 100A or 120A) close to the battery to protect the circuit.
If pressing "In" extends the motor instead of retracting it, disconnect power and swap the cables connected to the M1 and M2 posts, or reverse the outer switch wires.
[12V BATTERY] [ZJSF-120-12V BOARD] [DC MOTOR] +-------------+ +---------------------+ +-------------+ | | | [FUSE] | | | | ( + ) ----|------------|-----> V+ (IN +) | | | | | | | | | | | | V- (IN -) <----|-----------|--( - ) | | ( - ) ----|------------|---------------------|-----------|--(Case) | | | | | | | +-------------+ | | +-------------+ | M+ (OUT +) ----|-----------|--( + ) | | | | | | M- (OUT -) ----|-----------|--( - ) | | | | | +---------------------+ +-------------+ | | (Optional Potentiometer Wires) | +----------------
The diagram reveals two separate circuits inside the same jacket:
Connect the on the relay to the winch motor positive terminal . Control Signal:
Even with a clear diagram, errors happen. Here is a troubleshooting table for the ZJSF-120-12V:
If you only need movement without automatic stopping at the ends, wire the actuator directly.
