Sometimes my car will start and others times it will not. When it does not start I will have lights, interior lights and door sounds but no radio. Usually this time the radio will say sercurity on it. After the car does start after a couple try's the radio will sometimes become unlocked other times it will not.

SOURCE: Cracking sound from Radio Speakers

I disconnected the amp and ran jumper wires for the proper speakers (two wires per speaker eight total) . Basically I bypassed the amp now all speakers work and sound fine.

SOURCE: Security Light always on, door lock fuse keeps blowing

This is most likely a problem with your Passlock anti-theft system which is known issue with these cars. Passlock is a "passive" anti-theft system, which means that it will disable your ability to start the car if it thinks there is a problem. The three components that can cause this are: 1) Ignition Switch, 2) Ignition Cylinder, 3) Body Control Module (computer). The dealer is the only one who can solve this problem (unless you can bypass it, but it is not that easy). Estimated repair from most dealers is $800 and up.

SOURCE: 1999 silverado driver door dome light & radio shutoff not working

this is what it looks like it will be mounted on the door jam not on the door just look for it you will find it . it works bye when you open the door it grounds the dome light ground wire to the body. i have fixed thees before it isnt too hard. if the pic does not come up i will put the link under it



Door Jamb Switch Operation:
An electrical device that controls the on-and-off setting of a sub-system or system.







http://www.autozone.com/autozone/repairinfo/common/repairInfoMain.jsp?leftNavPage=productsHowTo&partCode=0900c152802145ae&title=Door+Jamb+Switch&targetPage=productInformation

SOURCE: Have a 2003 Monte Carlo SS. Usually happens when I

most of the newer cars especially the new chevys are all ran off the bcm or body control module, i would have someone with a snap-on brand tester check to bcm and the parts of your car first to make sure what is all wrong, could just be a shorted wire or a broken vacuum hose

Harvey N Tawatao

• 3854 Answers
• Posted on Dec 23, 2009

SOURCE: chevy cavalier wont start randomly! makes one

Ok then, from your description and the
make/model/year of the car you have there,
it appears you've reset the VATS.

The car's security immobilizer
reader at the key switch
does not recognize the coded
chip in the ignition key any longer.

You can try to put the key
in the ignition, turn to the on position &
wait at least 10 min like that.
(Do not turn off the key switch before
10 minutes as elapsed!)

Once done, the key is re-programmed and
should allow the fuel injectors to work again.
The car would start now if corrected.

In some cases, the VATS (GM'S VEHICLE ANTI THEFT SYSTEM)
will re learn the code this way, and will then
allow the restart, however if this does not work,
then you can simply tow it to any GM vehicle dealer
to have the service department re code it.

There is a permanent solution though.
Adding the PLJX Self learning Bypass module (59.95)
will bypass the PASSLOCK system in your vehicle
for good. See this at www.PASSLOCK2.com

Good luck I hope method 1 does the trick!

Here is the 30 min relearn:

Ignition keys relearn takes about 30 min to do. 30-Minute Learn Procedure 1. Turn ON the ignition, with the engine OFF. 2. Attempt to start the engine, then release the key to ON; the vehicle will not start. 3. Observe the SECURITY tell tale light. After approximately 10 minutes, the light will turn OFF. 4. Turn OFF the ignition switch, and wait 5 seconds. 5. Repeat steps 1 through 4 - two more times - for a total of 3 cycles of 10 minutes. 3x10 = 30 minutes. The vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch turn from OFF to CRANK Important: Turn the Ignition Switch OFF. The vehicle learns the Passlock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle. 6. Start the engine. The vehicle has now learned the Passlock Sensor Data Code and/or password. 7. With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles. Without a scan tool you may have momentary starter interruptions while history clears itself.