1989 Jeep Comanche Service and Repair Manual
1989 Jeep Comanche service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.
Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.
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MALFUNCTION OF FUEL INJECTION SYSTEM THROTTLE POSTITION SENSOR COULD CAUSE INTERMITTENT HIGH ENGINE IDLE SPEED IMMEDIATELY AFTER STARTING ENGINE.
HIGH ENGINE IDLE WHEN CAR IS FIRST PLACED IN GEAR COULDRESULT IN UNEXPECTED ACCELERATION.
REPLACE THROTTLE POSITION SENSORS WITH SENSORS THAT WOULD SEND CORRECT SIGNALS TO THE FUEL INJECTION
AUTOMATIC TRANSMISSION FLUID USAGE ATF+4. *TT *MJ
SUBJECT REGARDING WIRE SPLICE REPAIRS. *SB
THIS BULLETIN PROVIDES A REVISED WIRE SPLICE PROCEDURE AND RELATED PARTS. *TT
CONCERNS WITH ENGINE COOLANT USAGE. *NLM
INFORMATION ON INSTALLATION OF RADIO TRANSMITTING EQUIPMENT. *AK
VARIOUS CAR OWNER'S HAVE EXPRESSED INTEREST IN USING ENGINE COOLANTS MADE WITH PROPYLENE GLYCOL INSTEAD OF ETHYLENE GLYCOL. *YC
DIFFICULT TO CLEAN LIGHT COLORED "CHALKY" RESIDUE FROM PLASTIC BODY COMPONENTS THAT ARE MOLDED IN BLACK. *TW
UNKNOWN
Showing the 8 most recent of 11 technical service bulletins on file with NHTSA.
RUBBER CLUTCH HOSE FAILURE. HOSE IS ROUTED TOO CLOSE TO EXHAUST. (3 INCHES) HEAT BUILD UP IN EXHAUST SYSTEM MELTS HOSE AND CAUSES A LEAK THAT UNDER PRESSURE SQUIRTS FLUID ONTO THE EXHAUST PIPE CAUSEI
THE MASTER CLUTCH CYLINDER HOSE LEAKED FLUID ON THE EXHAUST MANIFOLD, CAUSING THE VEHICLE TO CATCH FIRE. *AK
TL* THE CONTACT OWNS A 1989 JEEP COMANCHE EQUIPPED WITH MICHELIN LTX TIRES, SIZE 31X10.50/15. THE CONTACT STATED THAT WHILE TRAVELING VARIOUS SPEEDS, THE TIRES EMITTED A LOUD NOISE AND CAUSED THE VEHI
TL* THE CONTACT OWNS A 1989 JEEP COMANCHE. WHILE DRIVING AT SPEEDS OF 55 MPH, THERE WAS AN ABNORMAL INCREASE IN ENGINE RPMS UP TO 3,000. THE CONTACT PLACED THE VEHICLE IN NEUTRAL AND THE FAILURE PERSI
I HAD A NEARLY NEW TRIUMPH R 1200 TIRE FAIL IN AN UNUSUAL MANNER. THIS TIRE HAD ONLY ABOUT 800 MILES ON IT WHEN IT FAILED, AND I'M REASONABLY CERTAIN THAT THE FAILURE WAS NOT DUE TO ABUSE (OVERLOAD,
Showing the 5 most serious of 12 complaints filed with NHTSA.
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