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Home >> Geo >> 1992 >> Tracker Base, RWD >> Repair and Diagnosis >> Engine Mechanical >> Engine Cooling Fan >> System Testing >> SYSTEM TESTING (STORM & STORM GSi)

SYSTEM TESTING (STORM & STORM GSi)

  1. Check fuse C-21, fuse C-11 and fuse link FL-4 with fuse tester, and ensure A/C is fully charged. Start and warm engine to 185°F (85°C). If cooling and condenser fans work, go to next step. If only cooling fan works, go to step 6). If only condenser fan works, go to step 8). If neither fan works, go to step 3).
  2. If cooling and condenser fans operate, disconnect thermoswitch connector, located on left lower side of radiator. With A/C on, run engine for 5 minutes. If cooling and condenser fans both work at least once in 5 minutes, system is okay. If neither fan works in 5 minutes, go to step 10).
  3. If neither fan works in step 1), connect a fused jumper wire between cooling fan check connector (White wire) and ground. Cooling fan check connector is located above brake booster. If both fans work, go to next step. If neither fan works, go to step 12). If only cooling fan works, go to step 6). If only condenser fan works, go to step 8).
  4. If both fans work in step 3), disconnect thermoswitch. Thermoswitch is located on left lower side of radiator. Connect a jumper wire between White and Black wires. If both fans work, replace thermoswitch. If neither fan works, go to next step.
  5. Remove jumper wire from thermoswitch. Check for continuity between thermoswitch connector Black (ground) wire and ground. If no continuity is present, repair Black wire between thermoswitch and ground connection, located in left front corner of engine compartment. If continuity is present, repair White wire between thermoswitch connector and condenser fan relay.
  6. If only cooling fan work in step 1) or 3), backprobe White/Red wire of condenser relay connector with a test light. Cooling and condenser fan relays are located in fuse/relay box in engine compartment. If test light does not glow, repair open in White/Red wire between cooling fan and condenser fan relays. If test light glows, go to next step.
  7. Using a jumper wire, apply 12 volts to Blue/Orange wire at condenser fan relay connector. If condenser fan does not work, check related power and/or ground circuits for continuity. Repair any problems found. If no problems are found, replace condenser fan motor.
  8. If only condenser fan works as described in step 1) or 3), using a test light, backprobe cooling fan relay (Black/Green wire). If test light does not glow, repair open in Black/Green wire between cooling fan relay and 30-amp cooling fan fusible link, located in engine compartment fuse/relay box. If test light glows, go to next step.
  9. Using a jumper wire, apply 12 volts to Black/Blue wire of cooling fan relay connector. If cooling fan does not work, check related power and/or ground circuits for continuity. Repair any problems found. If no problems are found, replace cooling fan motor.
  10. Disconnect triple switch connector, located on A/C receiver-drier, on right side of radiator. Using a jumper wire, short across both wires in connector. Both fans should work. If both fans do not work, check for voltage at White wire from condenser fan and coolant fan relays. If no voltage is present, repair open in White wire.
  11. If voltage is present, check for continuity between Black wire and ground. If no continuity is present, repair Black wire. If continuity is present, replace receiver-drier. Triple switch cannot be replaced separately.
  12. Disconnect thermoswitch connector. Thermoswitch is located on lower left side of radiator. Check continuity between Black wire of thermoswitch connector and ground. If no continuity is present, repair Black wire between thermoswitch and ground. Ground connector is located on left front side of engine compartment. If continuity is present, go to next step.
  13. Connect a jumper wire between thermoswitch connector terminals (Black and White wires). Remove condenser and cooling fan relays from fuse/relay block. Check continuity between White wire of condenser fan relay connector and ground. If no continuity is present, repair open in White wire between thermoswitch and condenser fan relay. If continuity is present, go to next step.
  14. Check continuity between cooling fan relay connector terminal No. 3 (White wire) and ground. If no continuity is present, repair open in White wire between cooling fan relay and condenser fan relay. If continuity is present, go to next step.
  15. Using a test light, backprobe White/Blue wire on alternator. If test light does not glow, replace alternator. If test light glows, go to next step.
  16. Using a test light, backprobe White/Red wire of restart relay connector. Restart relay is located in fuse/relay block on left front side of engine compartment. If test light glow, go to next step. If test light does not glows, check/repair open in White/Blue wire between alternator and restart relay. If wire is okay, replace restart relay.
  17. Using a test light, backprobe Black wire of A/C-heater relay connector. A/C-heater relay is located in fuse/relay box on left front side of engine compartment. If test light does not glow, repair open in Black wire between A/C-heater relay and restart relay. If test light glows, repair open in White/Red wire between A/C-heater relay and cooling fan relay.