Model Number: wf448aap/xac
Brand: Samsung
Age: 6-10 years

I'm getting the dreaded No Drain error on this washer. When it goes to drain cycle, Nothing happened. No sound, no whirring, no vibration... nothing.
I've got it all apart, tested the wiring to the drain and c-pumps and get clear signal. put both pumps on an outside power source and both spin.
I hook up the pumps to the internal wiring and start the spin cycle, and the following happens,
If only the drain pump is connected (violet and blue wires), then the drain pump spins
If both pumps are connected, only the c-pump (gray and blue wires) spins.

I am at a loss. Any ideas?