2001 Jeep Grand Cherokee - Page 7 - Answered Questions & Fixed issues

Are you sure the bulbs are ok? Yes it would be a strange coincidence they both stopped at same time. Sounds like a ground connection to lights may be the problem. Trace wire back from head lights see if you see any problems. Heatlight dim relay may be the problem or conections to and from it. It's ground connection may be the problem.

Is it the sensor for the gauge or the computer? To test the ECT,one for computer,remove sensor from engine, using an ohm meter, ohm the terminals in the sensor and make note of the reading. Next, boil some water and place the sensor in the water from about 5 minutes and ohm the sensor again. If the resistance reading changed, the sensor is working. The one for the gauge, simply unplug the wire from the sending unit and ground it to the engine. turn the ignition key to the run position and see if the gauge goes to "hot". If the gauge moves while wire it connected to ground, the sending unit is bad.

Have you tried testing to see if the fan has power t it?

then check fan relay and temp sensor next to thurmostat

what is it you need to know and include motor size

What could cause my 2001cherokee to make a noise and want move

Well the check gauge light is telling you to check your gauges, because of the low oil pressure. It could be a sending unit problem, or the oil pressure really could be dangerously low. Should be at least 25psi at idle.

there ya go, the check gauges comes on because the engine does not have oil pressure or it could be the oil pressure sender that is bad.

Hi Peter, I'm Al the owner of Big As Auto Repair Peter, alarms are extremely hard to fix without diagnosing them first, I want promise anything but I surely try to help you. First, have you tried turning the key in each of the door locks to see if one of them resets the alarm. 2nd, try by-passing the hood switch, that is one of the most popular problems with alarms. Question: Is this an After Market Alarm or an OEM Alarm. For further assistance go to my website. Have an awesome day Peter. Auto Repair

FIND, as in book or a scan tool? FIND , has vast meanings. find them , look them up, then see the code , what it does what tests to do , given any DTC code? here read this chapter.25 http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service chapter emission controls. or google , USA (how does OBD2 work)

The best support site I have found for Dodge is here, Allpar Dodge Chrysler Plymouth Jeep and related cars minivans and trucks Look in the tech sections and you may find the answer or you can type in a question. Contrary to what one user posted, I have no affiliation with this website beyond having used it myself. Allpar Dodge Chrysler Plymouth Jeep and related cars minivans and trucks

so find out which vent is dead,? before 5 gallon LYSOL flush an a week long GAG ! make sure first never to use RECRIC, when wanting to defog. and is the A/C running in dash defrost mode (compressor main shaft spins) if a vent is dead, its a bad damper valve, (not saying a part, a function) the book is free, you can read it, HVAC. see venting and dampers. its very simple in concept, a fan, a damper and dry air. hot. the heater core makes heat the non recirc, damage gives you fresh air, the A/C makes that air dry. and the dampers the supply all vents work work. so make sure the controls are set right, then see if the upper vents all blow, with hand waved on them. see? that is easy, and not reporting a dead vent ,makes help harder. the FSM is on line, ill look for you. but first HVAC 101

1. does blower work on high?
2. does the recirc turn to fresh are,and you get fresh air with blower off moving, at all top vents. y/n
3. do you have full heat? 180F + engine heat (scan tool shows this as ECT)
4. do all vents top work , blower on?
5. is the A/C compressor working in A/c mode (cold) and Defrost?
6. more... below.

Rule one, dont work in dash until air bags are DEFEATED (injury) (pull battery neg lug, and wait 1hour) got fsm page open, ill state some facts needed to fix this. first ill prove the dash system does not need total dismantle for all jobs. Does NOT. Air /mix blend door Single Zone/Dual Zone Driver's Side(FSM)

1. Disconnect and isolate the negative battery cable.
2. Remove the instrument panel silencer from the driver side of the instrument panel.
3. Remove the three screws that secure the blend door actuator to the driver side of the HVAC air distribution housing .
4. Remove the blend door actuator from the air distribution housing and disconnect the HVAC wire harness connector from the actuator.
5. Remove the blend door actuator from the vehicle.

next page, is blend door 2, type. has vacuum servos. we move the controls and make sure all servo vacuum motors work this car has driver side and passenger side seperate blend doors. so,,, we are getting close here> ? if the defroster fails,(seems not) then that is electric motor drive and very hard to test . (if not door jam) in any case, we need to know what part is failing, if the passenger blend is dead. seen below, we then must find out why 1: just stuck. 2: servo actuator failure 3: controls to #2 above bad, or connections to each. login to alldata.com see HVAC chapter, read how it works and the tests.

Check hoses going to heater core. Do both get hot? If so, problem may be a "blend" door failing to actuate due to vacuum leaks or bad actuator. If neither get hot, change thermostat.

You always try the solenoid first. Then, reset the ODBC and see if the code re-appears. If that doesn't work, them you move on to more expensive repairs. Always try the cheapest route first.

All of the suggestions are great. Resetting the computer by disconnecting the battery should work. If it doesn't, you may need the antenna that fits around the ignition key slot replaced. This item sends a signal to the chip in the key and receives its "resonance" to identify the key as being valid. If this antenna is burned out, the computer can't read the key. If you want to reset the security system (if so equipped) look here: http://www.ehow.com/how_7492453_reset-grand-cherokee-reset-antitheft.html

Can be several things. First is the normal maintenance performed? (plugs and air filter). If so, i would first look at fuel pressure at the fuel rail. Should be around 49 PSI (+-5 PSI). If low, change first the fuel filter/pressure regulator. If still low, then probably the fuel pump is getting bad.

no power to what, electric power or rotational power to wheels/tires. is this and engine question , transmission, or electrical question. post full symptoms hot or cold engine. the good, the bad or the ugly, all of it. pretend the web bunny is BLIND and WIN !

double posted ,why? alldata.com has it 24/7, log in and read for ANY car. posted 100s of time now, but nobody ever searches. or the free one. posted 100s of times too. here it is. see WJ here?, click wiring, http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service

You don´t have a spare key? Maybe a new key needs to be made.

Many times when the old battery was dead and a new one put in, the PCM has to relearn its settings. Push the accelerator a bit and see if it wants to idle around 1500rpm. Let it run for a few minutes like this and then release the accelerator.