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Radiator fan

Discussion in 'Cherokee' started by Chillmo, Apr 22, 2018.

  1. Apr 22, 2018 at 7:08 AM
    #1
    Chillmo

    Chillmo [OP] Well-Known Member

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    03 grand cherokee loredo, 4.0 straight 6 Family jeep. Just keeping her running slowly upgrading parts
    Radiator fan won't run. But hooked jumper wires to it and it turns. I Think it's the connector.. the harness coming off the jeep has a white wire with a blue stripe and a green wire, the fan has a blue and black.. which is which so I can just straight wire it without the connector... and if that dosent work.. how could I wire it so the fan comes in when the ignition is on?
     
  2. Apr 22, 2018 at 7:51 AM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine Moderator

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    Is power coming from the connector?
     
  3. May 3, 2018 at 6:20 PM
    #3
    Chillmo

    Chillmo [OP] Well-Known Member

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    03 grand cherokee loredo, 4.0 straight 6 Family jeep. Just keeping her running slowly upgrading parts
    Haven't had time to mess with it.. Going to this weekend.. Already cut the connectors off.. Pulled fuse in case there was power to the wire.. Gonna figure new connection. Dont want it straight wired.. I like how quick the fan comes out. Opens up a lot of free space when working on the front of the engine.
     
  4. May 3, 2018 at 6:53 PM
    #4
    aggrex

    aggrex Well-Known Member

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    DE
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    Tuffy>AEV>TTO>JW>STech>EVOcage>MagnaFlow>SpiderTrax>RockHard>TF>SpringTail>67design>Bolt>GPCA>Curt>
    If thats an electric fan unit it's usually thermostatically controlled. Probaby not a good idea to wire it up to run constantly with the ignition.
     
  5. May 3, 2018 at 7:05 PM
    #5
    Chillmo

    Chillmo [OP] Well-Known Member

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    03 grand cherokee loredo, 4.0 straight 6 Family jeep. Just keeping her running slowly upgrading parts
    Yea, I I decided to keep it on the harness, and replace the wires if I need to and wire in a new connector
     
  6. May 5, 2018 at 9:01 PM
    #6
    Chillmo

    Chillmo [OP] Well-Known Member

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    03 grand cherokee loredo, 4.0 straight 6 Family jeep. Just keeping her running slowly upgrading parts
    Ok.. So i wired the fan straight to the harness, put the fuse back in, fired it up. Fan didn't come on when it got up to temp. So cut the wires again. Pulled fan out, put jumper wires right to battery and it works. Harness wires are buried and we going to be hard to get to.. Does anyone know of any other way to keep the fan running through the power distribution box without using the existing wires..
     
  7. May 5, 2018 at 9:02 PM
    #7
    Chillmo

    Chillmo [OP] Well-Known Member

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    03 grand cherokee loredo, 4.0 straight 6 Family jeep. Just keeping her running slowly upgrading parts
    And my brother has an 01 same engine.. Same problem.. Soo I gotta get it figured out so we don't do damage to our engines
     
  8. May 6, 2018 at 10:12 AM
    #8
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine Moderator

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    Does it come on when the AC engages?
     
  9. May 11, 2018 at 8:02 PM
    #9
    Chillmo

    Chillmo [OP] Well-Known Member

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    03 grand cherokee loredo, 4.0 straight 6 Family jeep. Just keeping her running slowly upgrading parts
    We found the relay mounted on the fender.. gonna start there. Just haven't had the time.
     
    chris4x4 likes this.
  10. May 11, 2018 at 10:39 PM
    #10
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine Moderator

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    Keep us posted
     
  11. May 12, 2018 at 7:23 AM
    #11
    Awrench

    Awrench Well-Known Member

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    Advise against jumping wires on computer controlled vehicles.

    Check for codes- use a scanner. I think its P1491

    A SWAG - fan module issues. a common failure.
     
    aggrex and OFFGRID like this.
  12. May 18, 2018 at 5:54 PM
    #12
    Chillmo

    Chillmo [OP] Well-Known Member

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    03 grand cherokee loredo, 4.0 straight 6 Family jeep. Just keeping her running slowly upgrading parts
    Yea, I've got that code popping up. Fan relay on fender?.
     
  13. May 19, 2018 at 9:41 AM
    #13
    Awrench

    Awrench Well-Known Member

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    behind headlight - the relay/module.

    Often an access hole is made under headlight - just google WJ fan relay replace... Check fuses and connections before condemning
     

    Attached Files:

    JKBob 25 likes this.
  14. Jun 2, 2018 at 3:29 PM
    #14
    Gideon_Rah

    Gideon_Rah Active Member

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    I had the same problem with my WJ. It was the fan relay in that case too.
     

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