Abs problem code 7-4

Alright I have searched on this topic and found some info. Well the car sat for 6 months in my garage and then decided to start it up today, I left the e brake up if that matter my mistake.
Started it up and got the 7-4 abs code.
Ive already tried switching out the rear fail safe relay out and nothing changes,I was wondering the location on the solenod that Is in suspect for the rear?

Also never had this code or any codes before,

Anyone ?