Question about 2000 Jeep Wrangler

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The heater blower motor on my 2000 wrangler doesn't come on. the power wire is ... sometimes mine tach and speedometer will stop working then start again, ... also the airbag light comes on and the OBD II light comes on

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  • wtsmith6 Dec 13, 2008

    the heater blower motor on my 2000 wrangler doesn't come on. the power wire is ... sometimes mine tach and speedometer will stop working then start again, ...

  • wtsmith6 Dec 13, 2008

    the heater blower motor on my 2000 wrangler doesn't come on. the power wire is ... sometimes mine tach and speedometer will stop working then start again, ...

  • wtsmith6 Dec 13, 2008

    the heater blower motor on my 2000 wrangler doesn't come on. the power wire is ... sometimes mine tach and speedometer will stop working then start again, ...

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8 Answers

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You may have a faulty vehicle speed sensor in the transmission. This sensor signals the computer to shift the transmission and also drives the speedometer.
Because you replaced the speed sensor and are still experiencing the problem, we suspect that you have a faulty speedometer cluster.

We feel your problem is with the vehicle speed sensor. It should be located on the transmission tucked underneath the motor very close to the passenger side axle. If the wires have come off or are corroded, this could be your problem. If the wires and connectors look okay, then most likely, the sensor is bad.
The speedometer problem may be caused by the speedometer cable binding or the speedometer head itself. If it is the cable, other than the uneven speed reading, it should cause no problems. If it is the head, it may break the new cable.
No, there is only one speedometer connection on the back of the instrument cluster. You probably have a stripped gear inside the speedometer head causing the odometer to stop working..
Check all electrical fuses if ok, the ignition switch may be faulty.
Check the signal generator in the transmission, replace as needed to repair the problem.


Posted on Dec 13, 2008

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Hi my dear,, you need to replaced it with a new one, and the problem turned out to really be a melted wire on the switch panel. This motor works fine! Spins right up when hooked to a battery. Best place to start is to check for power AT the blower motor and go from there. No power at the motor, probably a problem with , if you have power at the motor then probably a bad blower motor. 
The heater blower fan motor and the AC blower motor are the same thing, so if you have cold air blowing out the vents from the AC (or ANY air actually) then you might have a problem with the heater selector switch on the dash. regards JAN_yuanjia

Posted on Dec 13, 2008

  • Antonio Buenafe Jr.
    Antonio Buenafe Jr. Jan 01, 2009

    chek the physical mechanics, or maybe the current flow, the current flow of the wirings has defected and the red wire check it properly

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Airbags when deploid for the first time never work the same again.. Is your car preowened?

Posted on Dec 13, 2008

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Sounds like heater core needs replaced!

Posted on Dec 13, 2008

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Check to see if you are getting power and ground to the blower motor - if so blower motor is bad. If no power possibly fan switch or selector switch Also check the blower motor resistor, found in heater plenum.
If spedometer and tachometer will not working it can be a speed sensor problems
Good Luck

Posted on Dec 13, 2008

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Just as some basic troubleshooting start at the battery clean the terminals, check for loose wires, if you have a manual look for fusible links and fuses that may be hidden, chances are something is loose or grounding out, make sure the battery isnt moving and the positive wire is touching any metal. Let me know what you find.

Posted on Dec 13, 2008

  • Justin Washburn Dec 13, 2008

    Sounds to me like the electrical system is shorting and restarting hence the reason the lights come on, they do te same thing when you first start the engine right?

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Hi,
The card is having an electrical problem , would recommend you to put the jeep on wired diagnostics at a service centre , to pin-point the fault. Also check for any faulty fuses. Disconnect the battery from the jeep for 5 mins and then check again.



Thanks
Proton

Posted on Dec 13, 2008

  • Mandeep  Singh
    Mandeep Singh Dec 13, 2008

    There should be a plug on the far left of the driver's side under the dash. You will need to plug an OBD II code scanner into that plug. scanner comes with a CD that lists all of the potential problem codes on your PC. Once you read the code from your scanner, you just look it up in the code list to determine your problem.
    A scanner is worth having because the trouble light on a Wrangler can point to about 80 different malfunctions.



    Thanks

    Proton

  • Mandeep  Singh
    Mandeep Singh Dec 13, 2008

    Here is the scanner that you can use



    http://4x4icon.com/offroad/obd_ii/index....









    Thanks

    Proton

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Seems some electrical fault, did you check all the fuse.

Posted on Dec 13, 2008

  • Legin Varghese
    Legin Varghese Dec 13, 2008

    you have to take it to a auto electrician as he need to physically check to find the exact fault. also seem the there is no major fault looks like some loose connection.

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Although vehicle electronics is not my strongest suit, I will tell you about the problems this year has had with HVAC components: The resister is a known problem which can heat up and melt wires and cause problems and "back feed" current into joining harnesses and melt and fuse them together causing you your grief. It should in all honesty, blow fuses when it does this but I did not encounter this when my hvac system was bad. Sometimes, the heater blower motor gets old and draws too much current as well and allows current to back feed into joined harnesses as well. Replace the black relay on the passenger side under the glove box with a high quality one. Check your resister,and blower fan for appropriate current and grounding. If you are having other related issues with your heater blower speed your selector switch may be bad too. Remove the cowling panel and pull the hvac module out of the dash (like a stereo) check for melted wires,plugs and harnesses. Run your fingers along the wiring and check for melted fused spots. Are you blowing fuses? This is your starting point. Let me know once you get this done and tell me what you have found. Take care and let me know how it goes.

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http://www.buywiring.com/products/2-7-wire-blower-motor-resistor-harness-with-12-pigtail?template_id=2&image_id=7

in the picture it is the part with the white sticker

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