Jeep Cherokee

It means that there are certain maintenance items that needs to be done at this time. Each time the odometer reaches a set factory mileage, it trips this light notifying you that something needs to be done. Look in your owners manual to see exactly what maintenance you should perform.

ANSWER I have a 2000 Grand Cherokee and wondered the same thing. In my vehicle, it is a user set function. You can set it to go off at various intervals to remind you that something is due. I have it set for 3,000 miles to remind me that the oil change is due. It can also be reset by me. As the last poster stated, see your user's manual.

Hey Robert==It should run from about 140 deg to 230 deg. Over about 260 deg. can harm the engine. Good luckJoe

The Thermostat is 210 deg - mine always runs within 10 deg.s either direction with the exception of heavy stop and go traffic will cause it to be higher.

I had an 89, great vehicle 289,000k. Some one stole it, and destroyed it. Some things that will help:

• replace the thermostat, and make sure that the copper plug is on the inside of the engine
• check for sheet metal or foil type insulation pads near the exhaust manifold. Check to see if something down there is getting burned or heated up and try to block the heat
• look on each side of the radiator fins to see if they are all clear and you have air flow. I kept having over heating problems with my Jeep, and not until I removed the radiator to replace it did I discover that a portion of the radiator that was hidden by the shroud and fan was completely covered in thick dry mud. No air flow.
• as far as your temp gauge not showing an over heating condition, does it work at all? It should show some increase in temp regardless. If you need to replace your temp sensor, it is a plastic plug with two wires coming out of it located on the intake manifold. It senses the water temp and sends it to the dash.
• new radiator cap.
• does the fan turn on? You can test it with a battery, if the fan works might be the fan temp sensor.
• do you have the right amount of good oil in the engine?
• water pump bad? Look at the water pump and if you are leaking water out of the weep hole on the bottom, your water pump bearings are bad and you need to replace the water pump. If you have a leak on the out side of the pump from a leaking gasket you might be sucking in air and not moving the coolant.

Hope this helps.

Anthony

REMOVAL & INSTALLATION IGNITION SWITCHRemoval Remove lower instrument panel trim panel. Remove 2 steering column-to-dash/brake support nuts and lower steering column. Remove screws holding ignition switch to column and lift switch off of lock rod. First remove Black harness connector, then remove White harness connector from switch. Installation1.Move position slider of switch to ACC position. Starting from alignment hole end of switch, positions are as follows: ACC, OFF-LOCK, OFF, ON, and START. START position is spring loaded. 2.Position switch onto actuator rod and loosely install switch to column bracket. Turn ignition key to ACC position and hold it there. 3.Push switch slightly down column to remove slack in rod. Tighten switch hold-down screws. Reconnect the White then the Black harness connector. 4.Turn ignition key to test all positions and make minor adjustment if necessary. 5.Install column to dash/brake support and install trim panel. LOCK CYLINDER Removal1.Disconnect negative battery cable. Remove horn/trim cover retaining screws from back of steering wheel. Remove steering wheel. Disconnect horn wiring. On models with round horn button, pull button upward and remove horn components. 2.Remove steering wheel retaining nut and vibration dampener. Scribe or paint reassembly reference mark on steering shaft and steering wheel. Use proper steering wheel puller to avoid damaging shaft or threads. 3.Remove lock plate plastic cover. Compress lock plate with Lock Plate Compressor (J-23653) for standard threads, or (J-23653-4) for metric threads. Pry retaining snap ring from steering shaft groove and slide snap ring toward compressor. See Fig. 1 . 4.Unscrew and remove Compressor. Remove snap ring, lock plate, canceling cam and spring from steering shaft. WARNING:Lock plate is held by high pressure spring. DO NOT remove snap ring without using a compressor tool. 5.Remove hazard warning switch knob from side of column by pushing inward on knob and turning counterclockwise. 6.Remove turn signal switch retaining screw. Remove turn signal/wiper switch rod. 7.Disconnect wire harness connector on bracket at lower end of steering column. Remove 3 turn signal switch retaining screws. Pull switch outward toward end of shaft. Ensure NOT to dislodge dimmer switch rod. 8.Insert paper clip below retainer so that retainer is flattened. Using needle nose pliers, remove key warning buzzer switch and contacts as an assembly. See Fig. 2 . Remove lock cylinder retaining screw. 9.Insert ignition key into lock cylinder and turn to ON position. Pull out lock cylinder. Installation To install, reverse removal procedure. Ensure that lock cylinder bottoms in bore and that it engages into gear for ignition switch rod by turning key. Fit warning buzzer in place, with contacts separated. Ensure dimmer switch rod is in socket in turn signal switch before tightening screws. Fig. 1: Removing Lock Plate & Snap Ring

Courtesy of CHRYSLER MOTORS Fig. 2: Removing Warning Buzzer Switch