Re: Securilock = Pats System
They are totally different systems and I've never heard of GM developing the SecurLock system for Ford. GM's system is PassLock. The original PassLock uses a key with a resistor chip on the blade that power is passed through, which the module checks the returning voltage, and in turn allows vehicle starting by sending a signal to the PCM. The next generation PassLock doesn't have a key chip, it just looks at the ignition cylinder switch and sees that it turns and has the correct voltage returned.
The original system could be disabled by wiring resistors into the sense circuit, but you had to figure out the correct resistance for the particular car you worked on.
Master ASE Certified L1 Chrysler Technician- still a Ford fan at heart.
1964 Thunderbird Hardtop- Chantily Beige- 390 FE 4V V8-Uncle's Car
1966 Thunderbird Convertible- Red- 390 FE 4V V8- Uncle's other car- waiting for paint and body work!!!
1967 Mustang Convertible- Blue- 289 V8- helping a friend re-assemble this classic