Question about 1998 Jeep Grand Cherokee
Noticed while driving my instrument panel had died. aircon stopped although fan and dash light on button still worked. Electric windows also died.
Under your hoods you should find a box like cover which covers your primary fuses and relays. In the old days, there were fusible links in vehicles which supplied primary power to different systems, for instance one to ignition, one to the interior dash panel and instruments, and another to exterior electrical and lighting. In newer vehicles like yours the old fusible links (which were basically a large gauge wire with a metal strip inline) have been replaced by heavy duty blade style fuses. You can purchase a very inexpensive automotive test probe which lights up when current is detected at almost any auto part store, or Wal-Mart (or similar stores). These probes look like a screwdriver with a pointed end and a wire coming from the back or out the side. The handles are clear plastic and have a bulb inside. The easiest way to test the fuses is to get one of those probes. If you choose to do so, simply connect the clip on the end of the wire to a piece of metal on or near your frame or engine. Remove the cover to expose the fuses. On each fuse you will see two metal points on either side that are exposed on the face of the fuse where the rating of the fuse is displayed. Turn the ignition key to the "on" position but don't start the vehicle. To verify that your probe is grounded (or earthed) touch the pointed end to your positive battery cable. It should light up. If not, select a different metal location to connect the ground clip to. Be sure that you are not connecting the ground clip to any wires, as they may be "live" and you could cause a short! After finding a good ground, test your probe again. Once you get it to light when touching the positive battery terminal, you can begin testing fuses. Touch the pointed probe end to the small metal pieces on the fuses one at a time. Be sure to test both sides of each fuse. If you get no light on a particular fuse, jot down the name of the fuse. If you get light on both posts of a fuse, that fuse is good. If you get light on one side but not the other, it is again a a bad fuse.
Now, if any of your fuses tested as bad, replace them with the same rated fuse and try your vehicles out to see if power is restored to the missing systems. If power is not restored, or if none of the fuses test bad, go back to your list of fuses that did not light on either of their test points.
Check the names or numbered locations of those fuses against your owner manual to see if they have anything to do with the place where you are missing power. If this is the case, you can try replacing the relevant fuse. However, normally if a fuse does not light on either test point it means that there is no power being supplied to the fuse itself, which means you likely have a broken wire or bad connection to the "fuse block" which supplies power to the fuse itself, and from there to your inoperative system(s).
Let me know how the tests go and I'll see if I can help you further if need be!
Posted on Feb 03, 2009
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Posted on Jan 02, 2017
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Well, here's the instructions from the service manual. The labor guide says this can be done in 1.6 hours...I don't see how, unless the instructions are wrong about having to remove the instrument panel. My thoughts are that if you are only doing the blower motor, the blower assembly will come out without pulling the dash. You probably only have to do a partial disassembly and remove the glove box and the glove box lower support.
Removal and Installation
1. Disconnect battery ground cable. Remove Instrument panel. (See Instrument Panel Removal) Disconnect resistor connector. remove blower assembly duct. Disconnect motor connector. Remove blower assembly
2. Remove blower assembly screws and blower motor assembly. Remove clip and fan from assembly. Separate motor case and remove blower motor. To install, reverse removal procedure.
1. Disable air bag system. See AIRBAG RESTRAINT SYSTEM article in ACCESSORIES/SAFETY EQUIPMENT SECTION. Disconnect negative battery cable. Scribe mating marks on steering wheel and shaft for installation reference. Using Steering Wheel Remover (J-29752) remove steering wheel. Remove steering cowl.
2. Remove instrument panel grilles and plug, or driving pattern indicator panel (A/T Models). Disconnect electrical connections. Remove instrument panel hood, instrument cluster ezel and instrument cluster. Remove hood release handle. Remove knee protector.
3. Remove dash fuse/relay block and side trim. Remove engine control module box. Remove radio console and glove box lower reinforcement. Remove speaker covers and glove box. Remove heater control panel knobs and cover. Disconnect heater control cables, and remove heater control panel. Remove illumination control knob. Remove instrument panel.
1. Install instrument panel. Install and adjust heater control cables. To complete installation, reverse removal procedure. Ensure mating marks on steering wheel and shaft align. Apply grease to contact ring and tighten steering wheel nut to 26 ft.lbs. (35 N.m).
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