I have never read so much rubbish in my life as im reading on here.
The Ford ABS system is FAR from unreliable. It is in fact VERY reliable, one of THE most reliable systems in use today in fact as its a very very simple one based on a simple waveform balancing circuit. You have got old cars for christs sake with old wiring, ask people who had these cars when they were newer if they had problems with the ABS, the answer will be NO!. When things do go wrong. fixing the system really is childs play, take it to someone who GENUINELY knows what hes doing with them and it will likely be fixed within a couple of hours. Dont rip the whole system off and fooking bin it for christs sake!!
And dont fit 15yr old used parts and moan they are unreliable when they die on you AGAIN, like the 15yr old one you took off, fit fooking new ones!! These items have taken FIFTEEN YEARS of abuse before they failed. Is that unreliable? Is it fook!!
Also:
Beware. The ABS light comes on with ANY circuit resistance or failure, one very common one is corrosion in the abs accumulator pressure switch, if that sensor fails suddenly you will lose ALL pump assistance and you very likely WILL crash the car, and possible kill people. Putting tape over a safety light that has doine its job and illuminated to tell you your brakes are possibly about to fail really takes the biscuit for me!!