Many year ago I bought a Phoenix pro injector.
It works on ABS systems without turning on the ABS solenoids.
It also does the Ford Ranger clutch,which is very contrary
If its not all fresh fluid,I would flush first,you can do that with the injector
by attaching at the brake line where it attaches to MC.
Heres a used unit for 1/3 new cost
https://www.ebay.com/itm/23691922465...iABEgJILPD_BwE