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Engine Specific Tech
94-95 5.0 - Specific
fan trouble...
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<blockquote data-quote="rz5.0" data-source="post: 1055048" data-attributes="member: 12700"><p>§*Constant*Control*Relay*Module*damaged.§ Fan Control (FC) circuitry damaged.§ Cooling fan motor (8C607) damaged.</p><p>G1: CHECK VOLTAGE SUPPLY TO CONTROL FAN*l Start engine and run until normal operating temperature is achieved.</p><p>l Turn engine OFF, leave ignition switch in RUN position.</p><p>l Actuate A/C damper door switch to MAX A/C position.</p><p>l Access the*constant*control*relay*module*(CCRM).</p><p>l Using a test lamp, back-probe Pin 1 Circuit 229 (R/O) and Pin 2 Circuit 229 (R/O) for voltage.Did test lamp illuminate?YesGO to «G2».NoGO to «G3».</p><p>G2: CHECK FAN GROUND CIRCUITl Using an ohmmeter connected to a known good ground, connect second lead Circuit 57 (BK) at fan control connector.</p><p>l Is resistance five ohms or less?YesGO to «G5».NoSERVICE fan control ground circuit for open circuit. RESTORE vehicle. RETEST system.</p><p>G3: BACK-PROBE FOR VOLTAGE SUPPLY TO*CONSTANT*CONTROL*RELAY*MODULE*(CCRM)l Using a test lamp, back-probe Pin 3 Circuit 38 (BK/O) for voltage.l Did test lamp illuminate?YesGO to «G5».NoGO to «G4».</p><p>G4: CHECK FUSE (60A)l Using test lamp, check both sides of fuse (60A).l Is fuse OK?YesSERVICE Circuit 38 (BK/O) for open circuit. RESTORE vehicle. RETEST system.NoSERVICE Circuit 38 (BK/O) for short circuit. RESTORE vehicle. RETEST system.</p><p>G5: CHECK FAN CONTROLl Disconnect fan control.l Using a No. 10 gauge jumper wire, connect one end to B+. Connect other end to low speed fan control terminal at fan control.l Using a second jumper wire, connect one end to a good ground, connect the other end to the ground terminal on the blower motor.l Did fan control run?YesSERVICE Circuit 229 (R/O) for open circuit. RESTORE vehicle. RETEST system.NoREPLACE fan control. RESTORE vehicle. RETEST system.</p></blockquote><p></p>
[QUOTE="rz5.0, post: 1055048, member: 12700"] §*Constant*Control*Relay*Module*damaged.§ Fan Control (FC) circuitry damaged.§ Cooling fan motor (8C607) damaged. G1: CHECK VOLTAGE SUPPLY TO CONTROL FAN*l Start engine and run until normal operating temperature is achieved. l Turn engine OFF, leave ignition switch in RUN position. l Actuate A/C damper door switch to MAX A/C position. l Access the*constant*control*relay*module*(CCRM). l Using a test lamp, back-probe Pin 1 Circuit 229 (R/O) and Pin 2 Circuit 229 (R/O) for voltage.Did test lamp illuminate?YesGO to «G2».NoGO to «G3». G2: CHECK FAN GROUND CIRCUITl Using an ohmmeter connected to a known good ground, connect second lead Circuit 57 (BK) at fan control connector. l Is resistance five ohms or less?YesGO to «G5».NoSERVICE fan control ground circuit for open circuit. RESTORE vehicle. RETEST system. G3: BACK-PROBE FOR VOLTAGE SUPPLY TO*CONSTANT*CONTROL*RELAY*MODULE*(CCRM)l Using a test lamp, back-probe Pin 3 Circuit 38 (BK/O) for voltage.l Did test lamp illuminate?YesGO to «G5».NoGO to «G4». G4: CHECK FUSE (60A)l Using test lamp, check both sides of fuse (60A).l Is fuse OK?YesSERVICE Circuit 38 (BK/O) for open circuit. RESTORE vehicle. RETEST system.NoSERVICE Circuit 38 (BK/O) for short circuit. RESTORE vehicle. RETEST system. G5: CHECK FAN CONTROLl Disconnect fan control.l Using a No. 10 gauge jumper wire, connect one end to B+. Connect other end to low speed fan control terminal at fan control.l Using a second jumper wire, connect one end to a good ground, connect the other end to the ground terminal on the blower motor.l Did fan control run?YesSERVICE Circuit 229 (R/O) for open circuit. RESTORE vehicle. RETEST system.NoREPLACE fan control. RESTORE vehicle. RETEST system. [/QUOTE]
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