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1) Using ohmmeter, check for continuity between specified rear differential lock switch terminals with switch in specified positions. See WIRING DIAGRAMS. 2) With lock switch in ON position, continuity should exist between terminals No. 2 and 5. With lock switch in OFF position, continuity should exist between terminals No. 2 and 3. 3) Continuity should also exist between terminals No. 1 and 6 with lock switch in ON or OFF position. If continuity is not as specified, replace lock switch. REAR DIFFERENTIAL LOCK SYSTEM AIR LEAKAGE CHECK NOTE: DO NOT apply more pressure than required to bring pressure gauge reading to about 5 psi (.35 kg/cm ). 1) Remove rear differential lock air pump and remove air hose from air pump. Connect a pressure gauge and air regulator (for adjusting compressed air pressure) to air hose. Using air regulator, adjust compressed air pressure until pressure gauge indicates about 5 psi (.35 kg/cm ). 2) Shut off air valve. Wait about 10 minutes and check if air pressure has dropped. If air pressure has dropped, air hose is not leaking. REMOVAL & INSTALLATION REAR DIFFERENTIAL LOCK AIR PUMP Removal & Installation Remove rear seat. Remove bracket from rear differential lock air pump and remove air pump. Disconnect air hoses from air pump. Disconnect electrical connector from air pump. To install, reverse removal procedure. REAR DIFFERENTIAL LOCK CONTROL UNIT Removal & Installation Remove left side lower quarter trim panel in rear compartment. Remove rear differential lock control unit. Disconnect electrical connector from control unit. To install, reverse removal procedure. WIRING DIAGRAMS |