y axis endstop not working

npm1

Hi
My y axis endstop is not working, the same endstop works for the X axis but not for the y
What going wrong.
I've gone ahead and change s0 to s1 on the endstop command, I've also gone ahead and added the L1 command and still

S1 will allow the y axis to move but would not be stopped by the endstop once reached
S0 will trigger the y axis endstop immediately without having the y axis move

The endstop being used:

https://www.amazon.co.uk/HICTOP-Printer-Endstops-Switch-Mechanical/dp/B07CWRC6Z1/ref=mp_s_a_1_1?ie=UTF8&qid=1551045115&sr=8-1-spons&pi=AC_SX236_SY340_FMwebp_QL65&keywords=hictop+endstop&psc=1#immersive-view_1551045128609

Please help

PuterPro

Have you checked it with a multimeter? Put it on Ohms setting and activate by hand, it should change between 0 and infinity (well, under one ohm, the wires have a bit of resistance).

dc42

Have you replaced the plug on the end of the cable, using the two outer pins for the Duet?

From the product listing, it looks like those endstop switches are wired as normally-open, which is S0 in the M574 command. In which case, if your Duet is a Duet WiFi or Duet Ethernet, the endstop LED should illuminate when the endstop switch is pressed, and be out when the endstop is not pressed. If it's the other way round, the switch is wired as normally-closed (S1 in M574).

See also https://duet3d.dozuki.com/Wiki/Connecting_endstop_switches#Section_Test_endstop_switches.