Question about Cadillac Fleetwood

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How do you have the ohms or whatever it's called replaced in the key? We are having the same problem and it's gettng worse. Is there any way to bypass this for good? It 's a 1993 sedan deville, not at the list on the bottom.

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GM Passlock system.

Aftermarket car alarms need a module to do just that. I would think that an alarm shop can fix you up.

Otherwise a resistor of the correct OHM value would need to be spliced into the computer wiring and the computer re-calibrated. You will need a good service manual to locate the wires and programming procedure.

Otherwise a trip to the dealer to have the wiring and ignition switch checked and repaired.

Posted on May 22, 2011

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Key switch went bad so i took it apart know i cant get it back togrther but i hot wired the car it will start but die 30 seconds later because of the anti theft how do shut it off so it will stay...


Hi,
If its like my 98 buick (most likely) I had a similar problem after I hit a deer. Tryed re-programming the key,etc...etc...no go. To bypass the 'smart key' part of the passlock system is simple. In your key is a small resistor. The little thing that looks like a metal sliver encased in plastic at the top thin portion of the key. This 'pellet' as it is called holds a specific resistance read by the lock and sends a signal to the computer that it is the correct key which in turn tells the security system its ok to start the car. To bypass this problem:

First use a digital multimerter set to OHMs 20K setting and hold the test leads to either side of the pellet. Write down the resistance value you get. Do this several times and note the resistance range. There are 15 different types ranging from 11.801 Ohms down to 0.402 Ohms.

Second, go to radio shack and buy resistors which add up to that resistance value, + or - 2% of the reading you obtained. Solder the resistors together is series like this: Say you got a reading of 11.801 on the key, you would solder them: 10K ohm---1K ohm---800 ohms.

Next, located a thin orange wire running down from the steering column. Its the only one, will have a 'rubbery' feel to it as it is actually 2 wires inside a coating. Allowing yourself enough room to work with the wire for splicing and soldering, cut the wire in half. You will see 2 white wires inside. Strip back the coating to give your self a couple inches of these 2 wires to work with on the end going toward the firewall , not the ignition. Strip 1/2" insulation from each wire giving yourself bare wire to solder to. Next solder in the resistor pack you soldered together in series before.

Like this
Wires from firewall end>>===' cut wire 1----solder-----resistors-----solder------wire2 ...toward firewall

Wires going to the ignition end do not have a use anymore,, so you do nothing with them.

Try to start car. If successful, wrap good with electrical tape and put the steering column covers back on---done! If not, you have tripped the body theft control and need to buy and aftermarket wave board to completely bypass the body control module of the passlock system. Good Luck!

Please rate this answer! Mike

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