1997 Chevrolet Cavalier will not start and keep blowing the cls/pcm fuse?

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

This is rare problem,but noticed by few Chevy users.The car will not start and has no spark,when the clutch is pushed the CLS /PCM fuse blows out.


That fuse that kept blowing is a direct wire to the PCM. Below is a picture of one of the connectors at the PCM. I have marked the pin number that you need to check. Make sure you're getting power at that pin number (it's a pink wire). Also below is a picture of a main ground for the circuit that the fuse was blowing. Also is a picture of the connector that that ground wire goes through. It's a black and white wire. Also I see you said you got a new computer. Did you have it or was it flashed for your vehicle ?






Sounds like pcm or wiring has a short causing fuse to blow. Maybe try another pcm.
You could also remove the alternator and have it bench tested at autozone or advance auto parts or your local auto parts store. This will tell you if the alternator is blown.This details will help.
Thanks.
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For more car related problem troubleshooting:---

This are the sections, you can go through and click the link to read its troubleshooting.

---------

The car will not start?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-start.html

-----------------

Car will not crank?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-crank.html

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Car has no spark?

http://schematicsdiagram.blogspot.com/2011/06/car-has-no-spark.html

-------------

How to troubleshoot car battery?

http://schematicsdiagram.blogspot.com/2011/06/how-to-troubleshoot-car-battery.html

-----------------

How to test starter solenoid?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-starter-solenoid.html

--------------------

How to test cars starter?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-cars-starter.html

How to replace starter in car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-starter-in-car.html

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car will turn over but will not start?

http://technoanswers.blogspot.com/2011/05/car-will-turn-over-but-will-not-start.html

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Car wont start?

http://howtobyme.blogspot.com/2011/10/car-wont-start.html

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Low beam lights now working but high beams work.

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

Possible that either the fuse is blown , the relay is faulty or the cluster switch is faulty.
All these would require a voltage check to confirm the case. so you need to use a multimeter or a test lamp of 12 volt to check the +12 to the switch , then to the relay and to the headlamp assembly.
Getting this possibilities tested will help to confirm the problem.
Thanks.
---------------

For more car related problem troubleshooting:---

This are the sections, you can go through and click the link to read its troubleshooting.

---------

The car will not start?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-start.html

-----------------

Car will not crank?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-crank.html

-----------

Car has no spark?

http://schematicsdiagram.blogspot.com/2011/06/car-has-no-spark.html

-------------

How to troubleshoot car battery?

http://schematicsdiagram.blogspot.com/2011/06/how-to-troubleshoot-car-battery.html

-----------------

How to test starter solenoid?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-starter-solenoid.html

--------------------

How to test cars starter?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-cars-starter.html

How to replace starter in car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-starter-in-car.html

-----------

car will turn over but will not start?

http://technoanswers.blogspot.com/2011/05/car-will-turn-over-but-will-not-start.html

-----------------

Car wont start?

http://howtobyme.blogspot.com/2011/10/car-wont-start.html

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Low beam Headlights shuts off after few minutes on 2006 Buick LaCrosse?

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

This problem is not very common,but some users have noticed this problem
Check out the details below for troubleshooting the issue.

It sound like faulty drl relay or low beam relay.check in the owners manual in dash for relays locations.in case you get caught dark on the way home you can use head light switch manually control head lights it will turn on head lights to get you home.


Possible areas to suspect must start from the DIP switch which is the cluster switch, the relays to the headlamps and the headlamps assembly /holders and ground to the assembly.
You can confirm only when tthe fault appears and I suspect that the fault will come by when the headlamps are switched on for a while. It might heat up any of the switches , the relay points or the holder contacts as a POOR CONTACT will heat the joint and so cut off voltage or deliver low voltage due to the resistance develeoped on the heated joint.
Use a 12 volt test lamp to test the circuits when the fault appears or a multimeter to confirm the flow of voltage when the fault comes up.


I recommend you replace the low beam relay in the box under the hood. Relay #35 as marked in red circle below.




But if all checked ok,then it can be problem with BCM.BCM means Body Control Module.
It is necessary to understand that your headlamp circuits are controlled by the Body Control Module (BCM) in your vehicle. Your headlamp switch is actually a very low voltage input device to the BCM. I think your BCM may be losing the input data from the headlamp switch, thus switching the headlamps off.

This details will help.Thanks.

--------------

For more car related problem troubleshooting:---

This are the sections, you can go through and click the link to read its troubleshooting.

---------

The car will not start?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-start.html

-----------------

Car will not crank?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-crank.html

-----------

Car has no spark?

http://schematicsdiagram.blogspot.com/2011/06/car-has-no-spark.html

-------------

How to troubleshoot car battery?

http://schematicsdiagram.blogspot.com/2011/06/how-to-troubleshoot-car-battery.html

-----------------

How to test starter solenoid?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-starter-solenoid.html

--------------------

How to test cars starter?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-cars-starter.html

How to replace starter in car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-starter-in-car.html

-----------

car will turn over but will not start?

http://technoanswers.blogspot.com/2011/05/car-will-turn-over-but-will-not-start.html

-----------------

Car wont start?

http://howtobyme.blogspot.com/2011/10/car-wont-start.html

----------

What is EVAP Leak problem on car?

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

The details are as follows :-----

The EVAP control system includes the fuel tank, fuel filler neck, gas cap, charcoal cannister, evap diagnostic solenoid, purge solenoid, all of the connnecting hoses/lines, ECM and related wiring. Anything that contains fuel that may evaporate (EVAP).
Does the vehicle have a P code for some EVAP problem, like large or small leak, or vent path blocked? Do you have a problem filling the fuel tank or is the Check Engine/ MIL lamp illuminated? If there is a larg or small leak the best way to identify where the leak is located is to use a smoke machine which creates smoke and introduces it into the system and you look for the leak.You will need to close the evaproative diagnostic solenoid using a scan tool or a jumper harness.

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This will help.Thanks.

---------------

For more car related problem troubleshooting:---

This are the sections, you can go through and click the link to read its troubleshooting.

---------

The car will not start?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-start.html

-----------------

Car will not crank?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-crank.html

-----------

Car has no spark?

http://schematicsdiagram.blogspot.com/2011/06/car-has-no-spark.html

-------------

How to troubleshoot car battery?

http://schematicsdiagram.blogspot.com/2011/06/how-to-troubleshoot-car-battery.html

-----------------

How to test starter solenoid?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-starter-solenoid.html

--------------------

How to test cars starter?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-cars-starter.html

How to replace starter in car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-starter-in-car.html

-----------

car will turn over but will not start?

http://technoanswers.blogspot.com/2011/05/car-will-turn-over-but-will-not-start.html

-----------------

Car wont start?

http://howtobyme.blogspot.com/2011/10/car-wont-start.html

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