1998 GMC And A 2000 Chrysler Sebring

GMC Security System Problem And A Chrysler Blower Motor Problem

Oct 18, 2008

This weekly Q&A session answers your questions about cars and trucks. This week explores a 1998 GMC with a security system problem and a 2000 Chrysler Sebring with a blow

Question: Security System Problem

I have a 1998 GMC security system problem. I've changed the Passlock sensor key and the cylinder ignition switch and recoded with the key cycle. It starts some times. If it does not you can wait 15 to 20 minutes and it will start. Could the Passlock module be the problem?

Answer:

The Passlock module could very well be the problem, but without being able to test the system there's no way for me to be sure. I have seen quite a few ignition lock cylinders go bad. If you replaced the ignition lock cylinder along with the ignition switch, that should have fixed the problem. If not then the problem is more likely the lock cylinder.

There are two small wires that go from the sensor that reads the ignition key to the Passlock Module. These wires have a tendency to break and leave an open circuit. The Passlock Module reads this as a "no key inserted" and assumes there is an attempt to steal the vehicle. So it locks out the starter and ignition system.

General Motors has a security system tester they can plug it to access the Passlock self-diagnostics and pull up trouble codes and test the whole system. Before replacing a very expensive Passlock Module, I would suggest having your GMC Dealer check the system and be sure it is a bad Passlock Module.

Question: Chrysler Sebring Blower Motor Problem

I have a 2000 Chrysler Sebring, and the A/C-heater fan only blows on high speed. The other speeds do nothing. What part do I need to replace?

Answer:

Sounds to me like you have a bad Blower Motor Resistor. They are very easy to replace. You have to remove the glove box. Once you do that you will see the Blower Motor Resistor. There is one small screw hold it in. Unplug the Blower Motor Resistor connector, remove the screw and the Blower Motor Resistor will pull straight out.

Now just pop the new Blower Motor Resistor in, replace the screw, the Blower Motor Resistor connector and the glove box and you're all set.

That's all for this week. Feel free to browse the archives for past topics and other resources. And, as always, if you are stuck and need an immediate answer you can always call Vince on the phone. For a limited time new callers get the first three minutes free!

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