Question about Chrysler PT Cruiser

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2002 PT Cruiser LE (no Turbo) Overheating. (Fan not coming on when needed). There is no white smoke, car has never overheated to the boiling point, no visable leakage We have replaced : 1. Radiator Fan Motor (fan was bad..would barely turn) 2. Radiator Cap (very small leak) 3. Thermostat 4. Temperature Sensor 5. Relay (in fuse box) 6. New PCM (computer) When car started after last replacement (PCM Board) all the lights came on correctly, everything OK. Started car, turned air on/off several times Fan came on, all OK. Drive 2-3 miles all ok, pulled back in driveway, let car idle for few minutes, turned air on immediately ran hot and fan would not come on. 1. Could there be a short in wiring? 2. Is there a machine available to detect wire short?

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  • dianehall74 Jul 28, 2009

    Hi thanks for a quick reply. Any time the fan is suppose to come on (when temp. reaches the need for it) the needle will go up in a split second. With or without air. The fan is not coming on. Even after all these replacements. Which makes me wonder if it is electric problem. Do you think it's the wiring as well?

    I just don't want (and can't afford) to be hit with a huge bill.

  • dianehall74 Jul 28, 2009

    I was told to purchase a voltmeter and or a test light.

    That there could be a short, or other things in the wiring causing the fan motor to not come on.

    Instructions were to start engine when it starts to get warm or to the point when I think the fan should be coming on, check for power and ground at the fan connector. Once you know what you are missing (power or ground) then pull a diagram and trace it down.

    Please advise on this suggestion.

    Also, if we run a seperate switch for the fan as you suggested. How hard is it to do that, can we find instrutions somewhere? We live in NC. not too cold.

    Thanks a Bunch Ben

  • dianehall74 Jul 29, 2009

    When using the voltmeter, what am I checking for and from which wire do I start and finish.

  • dianehall74 Jul 29, 2009

    Is there anyway you can do that without me being right there at the car? If so, that would be great. I can take your steps and go from A to Z. And if there are questions I can reply back.

    It sounds like a lot for me to ask...(feel bad :>(
    But the car is parked at a friends garage and written instructions are about the only way I could attempt this.

    Don't hesitate to tell me if it's asking too much. You've been very kind and I apreciate what you've done.

  • dianehall74 Jul 29, 2009

    I was asking for steps to check the wiring with a find the problem and replace wire. Is that a possibility.

    The car is at a friends garage, but he does have lots of auto tools there.

    I would like to find and fix the short if at all possible.

    What do you think?

  • Adin Demary
    Adin Demary Feb 01, 2014

    alldata trouble shoting chart n ohm meter u can get the repair guid for that car there trouble shooting charts in the back of most.



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There is no machine for this,however a VERY skilled auto electric shop might be able to help.They really have to have a Gift with car wiring to fix your problem,it can be FIXED,find the right shop in your area.I will try and think this through to help you,this is what I used to do,It's not a book problem it is experience that will fix your car. I do have a question? How does your car run without the AC on?

Posted on Jul 28, 2009

  • 4 more comments 
  • Leonard Williams Jul 28, 2009

    Yes you do have an electric problem.Sorry I can't be there for you. Listen to this if you dont have the funds or wish not to take the chance for THE big bill.I have a thought to share.If you unpluged the fan at the fan you could run a seperate switch for your fan by passing the computer and the sensors.You would have to run a hot and ground wire to the fan.The only thing is you must not forget to turn it on. You could rewire it to come on with the ignition,the fall back to this, in the winter if you live in cold region you will not get heat very fast.But you will have heat.Let me know how you make out.

  • Leonard Williams Jul 28, 2009

    Unplug the fan.Run a hot wire from the fuse box to the new switch(toggle switch) run a wire on the other side of the switch the the hot side of the fan and another wire from the ground side of the fan to a good ground. When using the car just flick the switch and the fan will work.

  • Leonard Williams Jul 29, 2009

    I can walk you through it if you and I have the time,I dont mind,All I have to do is type for you.LOL

  • Leonard Williams Jul 29, 2009

    If the car is at a garage,ask them what they would charge you to run a toggle switch with a light from inside your car to the fan. #2 do you know any thing about using wire cutters and doing a little mechanic work?

    IF you want do this.Buy a toggle switch it you do,dont get one with a light,its too hard for you.

    you will also need a small pach of wire connectors and a wire connector tool,inexpensive will do .

    Get 2 small 14 guage rolls of wire.You will need approx 5-10 feet x's 2. You need 2 rolls because they have to be 2 different colors so you know wich one will be hot and ground.

    Get a brass fuse connector for your new wire.YOu will pull the fuse and put the brass connector onto the fuse and place it back into the fuse box. you will put 4 connectors on the wires 1 on each end.three will be female push on 's and one will be for a circle connector to put the screww through,which you will find for ground.

    you ground one side of your fan. and run the hot from the fuse box to the switch and from the other side of the switch to the fan motor.

  • Leonard Williams Jul 29, 2009

    Sorry! If you have the time using a volt meter will help you solve your problem,Start at one end and go to the other.checking for feed and ground.

  • arlene Jun 15, 2013

    well last time when it got hot they replaced the fans and one of the hoes. it dont not over heat but the air condistion never work again after that day. i would put freeont and in 5 hours it be hot again



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Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your 2002 Chrysler PT Cruiser, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people like you. So here is the link to:
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Get more great, money saving, tips and tricks about your vehicle from:

Thanks for the vote, and good luck!

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