How do you bypass the passkey on a 1991 Cadillac Eldorado?

Answer 1

Ok, here you go. A) With an ohm meter, measure how many ohms between one side and the other of the "chip" in the ignition key (from the metal ridge in the middle of the black plastic on one side of the key to the other side). An electronics store or Radio Shack will probably measure the resistance of the key for you. B) on the bottom of the steering column, find the passkey wires (they are yellow) and they are quite small. MAKE SURE YOU DONT HAVE THE AIRBAG WIRES!!! C) cut these wires and install a resistor of matching resistance to what you just tested....i.e. if the key measures 5 ohms, go to Radio Shack or an electronics store and buy a pack of 5 ohm resistors, solder it in between the two cut wires. D) Just remember that any properly cut ignition key will now start and run the car, the passkey system is defeated. This also works to use for a remote starter system, so you dont need a spare key or "Passkey (or VATS) II module"