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The "FM" is the radio. It works only after warming up for about 10 minutes. It has to be on FM all that time to come on. The AM portion works fine. Also the rear windshield wiper doesn't respond but will come on intermittantly by itself..Als the seat position only works sporadically. The information center below the radio only works from time to time. I suppose it has to be electronic, but what? Also...I forgot to mention, the left speakers do not work. Could that be related to the amplifier? Are there any circuit boards that could be replaced?
NOTE: THIS BULLETIN APPLIES TO VEHICLES BUILT PRIOR TO JUNE 18, 1997 (MDH 06-08-XX)
Water can enter the liftgate ajar switch causing corrosion to the terminals. This condition can lead to any of the symptoms listed below:
If customer complaints are received indicating any of the complaints listed above, perform the Repair Procedure.
Connector Repair Package
This bulletin involves replacing the liftgate ajar switch and repairing the harness connector.
NOTE: THIS BULLETIN APPLIES TO 1996 GRAND CHEROKEE LIMITED MODELS EQUIPPED WITH A PREMIUM CASSETTE RADIO, SALES CODE RBN, AND THE JEEP CUSTOM MEMORY SYSTEM.
The customer may experience an intermittent condition in which there is no audio output when the ignition key is turned on. The condition is usually accompanied by a loud popping noise which occurs when the volume control knob is turned. The radio will return to normal operation after the volume control knob is turned.
If customer complaints are received as described above, the radio will be required to be returned to the local Mitsubishi Radio Repair Center for exchange. Refer to the Warranty Policy and Procedures Manual for the repair center locations in your area. Make sure to clearly communicate the symptoms to the repair center. The symptoms should be stated as: "1996 ZJ Limited RBN radio with an intermittent no audio output condition due to interference between the radio and the Memory System Module". The replacement radio must be Part Number (NNN) NNN-NNNN
This bulletin involves removing the radio and obtaining an upgrade exchange unit from the local Mitsubishi Radio Repair Center.
Some vehicles are equipped with remote radio switches. These switches or wiring (clock spring) can cause symptoms that in the past may have been internal radio problems. If radio symptoms occur that involve any of the remote radio switch functions, be sure to check the switches and clock spring prior to sending the radio out for repair. Remote radio switch diagnosis can be found on page 8F-5 in the 1996 Grand Cherokee Service Manual.
Some of the symptoms that could occur as a result of malfunctioning remote switches are:
The heated seats work..
The seat heaters work. The other functions of the seat work properly. The things that don't work are: 1- memory seat
2- back window windshield wiper
3- information center below the radio.
all (3) of these things will start to work for no reason. Then they won't work for maybe a month.
The dash lights will work if I press anywhere on the guage panel or the light switch itself.
When the dash lights do work, they generally will stay on until I turn off the vehicle.
Is there anything that would cause the dash lights, the seat position settings, the rear windshield wiper, or the information center to only work from time to time?
Is there a ground, a circuit board or anything you can think of. Its driving me nuts.