Question about 2004 Chrysler PT Cruiser

1 Answer

2004 PT Cruiser radiator fan comes on in high speed mode when AND

Diagnosed at local repair shop as bad fan. They say they get nothing when applying 12v to low side connection (where the three prong connector hooks into the fan unit) but it works fine when 12v applied to the highspeed side. They want 300 to replace fan unit, I can't aford that right now. Does anybody know if I can make a temp fix by putting a jumper between the lowside and highside connectors, thus activating the highspeed fan when either the AC is on or the engine is warm. Since this unit is at least partially controlled by the car's computer (I think) will it damage the computer? I notice the AC won't go on without the fan spinning (the compressor kicks on and then off again within a second or so), presumably because the fan's not on. If the fan's spinning due to warm engine, AC kicks on and kicks out cold air. I'm hoping a temp fix will last a couple of months until I can get a new unit off the internet (as cheap as $72) and either find a step by step for DIY or save up enough to pay the shop to put it on..

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 434 Answers

You can either jump power from the high to low sides, or wire a switchable power wire so it comes on when the ignition turns on. It isn't really computer controlled. A sensor just sends power to it when it needs to run. No fear of hurting anything.

Posted on Jul 01, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

My 2005 pt cursier (104,000 miles) will stumble & A/C stops working @ idle. Do I need to replace the radiator & the fan?

Check to see if the high speed fan (I think it's the one on the right) comes on when you turn on the air conditioning. If it doesn't, the condenser (in front of the radiator) will overheat and the high pressure switch in the A/C system will turn off the compressor. If this is the case, the fans should be replaced (they come as a set). You shouldn't have to replace the radiator or the condenser if they are not leaking, but have your A/C system checked and serviced if you found that the cooling fans were not working properly.

Jan 14, 2016 | 2005 Chrysler PT Cruiser


Engine Overheating due to Radiator Fan Motor

Found out PT Cruiser has a 2 speed fan and when engine runs hot in traffic or at idle or low speed it usally means the high speed on the fan motor has gone bad. I bought a new fan motor with the cowling on ebay that is a generic one and it cost only about a $100 with shipping from a company in Tennesee and it has solved the problem now for over 10 months now.

Replacing the radiator fan and cowling was 2-3 hours work even with some help from another person.


on Dec 18, 2008 | 2001 Chrysler PT Cruiser

1 Answer

How do i remove the radiator and fan together?

Radiators have plastic shrouds over them to concentrate airflow. You need to remove this shroud to remove fan and radiator more easily.

Sep 20, 2012 | 2004 Chrysler PT Cruiser

1 Answer

Engine light came on and car is over heating. Took it to auto zone and was told it's the fan relay. Its a 2003 PT Cruiser, Turbo. I opened the fuse box under hood. There are 3 spots for relays in there...

Turbo Radiator Fan

The radiator cooling fan is a variable speed electric motor driven fan. The radiator fan assembly includes an electric motor, fan blade, and a support shroud that is attached to the radiator. The radiator fan is serviced as an assembly (fan motor/fan/shroud).

The variable speed radiator fan is controlled by the Powertrain Control Module (PCM) by way of a Pulse Width Modulated (PWM) signal. The duty cycle ranges from 30% for low speed operation then ramps-up to 100% for high-speed operation. This fan control system provides infinitely variable fan speeds, allowing for improved fan noise, A/C performance, better engine cooling, and additional vehicle power.

To control radiator fan operation, the PCM looks at inputs from:

Engine coolant temperature
A/C pressure transducer
Ambient temperature
Vehicle speed
Transmission oil temperature (automatic transmission only


Jun 26, 2011 | 2003 Chrysler PT Cruiser

1 Answer

I've been experiencing the same issues with my vehicle

The high speed circuit is burned out on your radiator fan motor, replace the fan motor and the ac should work just fine

Jul 30, 2010 | 2004 Chrysler PT Cruiser

1 Answer

2003 pt cruiser overheats. The electric enging fan does not come on. there are 3 wire coming off the fan a yellow,black and green. If I apply 12 volts directly to the green wire it comes on. After the...

On the engine side of your radiator there is a circular switch that is screwed into the the back of the radiator. That switch most likely has failed. You and remove the 2 wires from it and then jumper across the terminals with the engine running. The fan should come on. If it comes on then the switch has failed. If it still does not come on the fan relay is probably bad.

Thanks for using FixYa.


Apr 10, 2010 | 2001 Chrysler PT Cruiser

1 Answer

Engine died at hwy speed crank/cam sensor faults

o1 cruiser spit and sputter go down rd put cam sensor and crank shaft sensor on wouldnt run at alll with new crank sensor had to put old one on please hel

Sep 29, 2009 | 2004 Chrysler PT Cruiser

1 Answer

I need a wiring diagram for the radiator fan on my 2001 pt cruiser

Check your public library they may even have access to a paid data base. Maybe this will help. With electric fans it's almost always the motor, It's a two speed fan that has three wires. The black is ground, the dark green is the hot for the low speed and the yellow is the hot for the high speed. Run jumpers from the battery to the fan connector. If the fan doesn't run the motor is bad.

Aug 10, 2009 | 2001 Chrysler PT Cruiser

Not finding what you are looking for?
2004 Chrysler PT Cruiser Logo

304 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chrysler Experts


Level 3 Expert

81285 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers


Level 3 Expert

814 Answers

Are you a Chrysler Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides