heated bed problems on RAMPS 1.4

Hey
I need help figuring out what my problem is.
heated bed wont heat up. everything else works fine. I checked the drain to source polarity on the mosfet and I read 3-4 ohm one way and inf the other way...

to Kliment on IRC, I attached a photo of my wiring

I have the same problem and I'm not sure why it's not heating up- anyone with any advice would be greatly appreciated

Did you measure the voltage across the D8 terminals? How about across the heated bed terminals?

Are you both using marlin? if yes then it's your firmware, guarenfuckingteed. I had the exact same problem. When i get off work i will send you my configuration.h try and upload that instead of what you have now and see if you can't make the led's light up and the heated bed start heating

If you answered no to the first question, disreguard anything and everything i wrote.