Quote
uncle_bob
Based on your readings 1 and 2 go to ground via the FET or relay and 3 and 4 go to +12. If your readings are right - that's a very low power silicone heater.
Hi uncle_bob,
This is taking the readings/measurement from the wires connected to the heated mat, it's not connected to the RAMPS yet, I wasn't sure which way the 4 wires were suppose to be connected to the power from the RAMPS module.
Cheers,
Glenn