Question about 2001 Chrysler PT Cruiser

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Fan not running on 01 p.t. cruiser engine code B, non-turbo. 40A fuse, motor, small underhood relay ok. can large square relay underhood be it or coolant sensor? where is coolant sensor located? any other ideas? already submitted this info once along with card info???????

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  • westerly84 Jun 23, 2009

    do you believe that is the most likely problem? what about the low fan relay in the underhood fuse panel?

  • westerly84 Jun 23, 2009

    saved time knowing where part was located and money by not buying the two relays i would suspected first.

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The engine coolant temp sensor is in the assembly that the pressure cap (radiator cap) goes on. it's under the part that the cap goes on, closer to the engine block. you can see the wires and the plug going to it. here's the remove and replace step by step:

1. disconnect battery negative terminal (they always tell you to do that when you work on electrical parts)
2.partially drain cooling system below level of ect sensor
3.disconnect ect sensor
4.remove ect sensor

To reinstall
1.install ect sensor torque to 168 in-lbs
2.connect sensor electrical connector
3.connect battery negative terminal
4.refill system with coolant

Posted on Jun 23, 2009

  • mithun dey
    mithun dey Jun 23, 2009

    mostly yhis issue occurs due to this only.... we will step into other conclusion if this doesnt help!!

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2005 odyssey wiring diagram. Need to discover what 40A fuse BackUp Circuits is


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Why are the fans not coming on in my 1999 deville


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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.

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1 Answer

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1 Answer

I need a diagram of the underhood fuse block for my 2002 ford explorer. I don't have an owners manual.


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14 10A* Foglamps 15 15A* Memory (KAPWR)
16 15A* Headlamp switch 17 20A* 4x4 (v-batt 2)
18 20A* 4x4 (v-batt 1) 19 20A** High beam relay
20 30A** Electric brake 21 30A** Front wiper motor
22 20A** Autolamp; Low beam 23 30A** Ignition switch
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28 20A* Horn relay 29 60A** PJB 30 20A** Rear wiper motor
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35 20A** Rear power point 36 40A** Blower motor
37 15A* A/C clutch relay/Transmission
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