Question about 1994 Ford Mustang
Is the same relay that works with the fuel pump it's call constant control relay module
Posted on Feb 23, 2011
Actually a ccrm (constant control relay module) and it is inside the fender well on the passenger side. To access remove the air intake tube reach in the 2 holes there are to bolts holding it in place and then there is a smaller bolt holding the wiring harness to it. Check for any burnt connections. You can either replace it or open it up and resolder the correct damaged relays in place.
BTW: Here are steps for isolating problem when fan doesn't turn on when AC turned on (95 GT):
§ 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?
GO to «G2».
GO to «G3».
G2: CHECK FAN GROUND CIRCUIT
l 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?
GO to «G5».
SERVICE 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?
GO to «G5».
GO to «G4».
G4: CHECK FUSE (60A)
l Using test lamp, check both sides of fuse (60A).
l Is fuse OK?
SERVICE Circuit 38 (BK/O) for open circuit. RESTORE vehicle. RETEST system.
SERVICE Circuit 38 (BK/O) for short circuit. RESTORE vehicle. RETEST system.
G5: CHECK FAN CONTROL
l 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?
SERVICE Circuit 229 (R/O) for open circuit. RESTORE vehicle. RETEST system.
REPLACE fan control. RESTORE vehicle. RETEST system. Hope this helps you and let me know if you need any further help.
Posted on Sep 05, 2009
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Posted on Jan 02, 2017
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