Question about 1999 Plymouth Grand Voyager

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Cooling fan doesn't turn on when vehicle is hot.

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  • yadayada
    yadayada Jul 08, 2010

    DO NOT OVERHEAT THIS VAN, GO TO A SHOP AND GET THE PROBLEM REPAIRED, IF U DO OVERHEAT IT MORE THAN A FEW TIMES THE ENGINE WILL REQUIRE VERY EXPENSIVE REPAIRS.

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I have a 1998 and it turned out to be the cooling fan relay. A $30 part from rock auto.com get the relay switch and the wire harness together because my plug for the connection was corroded. thus a bad connection so check that first. The relay is on the driver side chasis underneith. just infront of the wheel well. with two short bolts and a plug that is hard to pull apart with a clip in the center of the connection. So you need a small flat head screw driver.
I figured it was the RELAY because the temp gauge was still showing proper temps when it was getting hotter So i turned on the heat on full blast to cool it back down. Disconnect the neggative terminal on the car battery when you work on the wire harness for the cooling fan relay. Hope this helps you.

Posted on Jul 09, 2010

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Could be a 2 or 3 Components, Cooling Fan Switch, or Cooling Fan Control.
Sometimes the Switches are not Bad ,but have Bad Wiring ,Not Connected good, Corrosion on the Switch Terminaltheres 2 on the Coolling Fan Switch. The Cooling Fan control Could also be not working because of Connection Bad or Corrosion.

They Both Work off the Engine Control Computer. They signal the Coolant Temperture to the Contoler and it Turns Fan on and Off.

I would personally Recomend you just Replace them since your vehicle is over 10 Years Old.

Should Find them around Radiator and Fan.You'll see the Wiring running to these .

Please let me know How i've helped you ! By Voting.

Thanks For Using FIXYA From d_hubbs

Posted on Jul 09, 2010

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I have a 2000 plymouth grand voyager. it got towed in as a no start but started off the truck and all that day. the next morning i tried and nothing it wasnt cranking. after all my testing i came up with a bad computer. i have power and grounds going into the computer but nothing coming out. im not getting any ground singal to actviate the starter, asd, or fuel pump relays. im not getting the 5 volt reference out of the computer either. so i ordered one from chrysler and put it in and the same thing. so on the off chance it was defective seeing how all our testing still comes out two a bad comp. i ordered a second one. installed it today nothing. same exact as before. anyone have this problem before or any suggestions on what the hell i am missing.

Posted on Aug 10, 2010

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Either temp sensor, fan relay or fuse for fan.

Posted on Jul 15, 2010

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Posted on Jan 02, 2017

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SOURCE: the fan for the cooling system is not working and is brand new

the cooling fan relay or control module is located under the front bumper on the passenger side usally have to remove front bumper or remove passenger headlamp and drill black plastic with a 2" hole saw

Posted on Mar 16, 2009

  • 1509 Answers

SOURCE: Both radiator cooling fans won't turn on vehicle overheats

The fans come on only when hot or the AC is on. There are many fuses that have to be good for it to work. The fan relay should have 2 pins hot with the key on, The other 2 should be ground. with the key off one should be hot and the other can then be ground the other pins that are ground one of them is the fan. the other becomes ground when the computer turns the fans on. If you don't have a pin thats hot at the relay all the time then theres a blown fuse or even the power wire from the battery at the battery

Posted on Nov 02, 2009

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This will help.

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