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| Feature | Specification |
| Primary Part Number | MOTORCRAFT DY-438 |
| OEM Part Number | E4LY-11433-A (Ford/Motorcraft) |
| Alternate OEM | E4LB-11433-A2A |
| Function | A/C Compressor Cut-Out/Control Relay or Radiator Fan Controller Relay |
| Voltage | 12 Volts |
| Amperage Rating | 30 Amps (Common high-current relay rating) |
| Terminals | 5 Male Blade Terminals (Standard relay configuration for this function) |
| Construction | Rectangular Plastic/Metal Housing |
| Typical Use | Original Equipment (OE) relay for controlling the A/C clutch or cooling fan. |
| Vehicle/Truck | Years | Application Notes |
| Ford Escort | 1981 - 1996 | A/C Control, or Control (various functions). |
| Mercury Lynx | 1981 - 1987 | A/C Control (w/o AC note on some applications). |
| Ford EXP | 1982 - 1988 | A/C Control, or Control (various functions). |
| Ford Thunderbird | 1985 - 1992 | Control (various functions). |
| Mercury Cougar | 1987 - 1994 | A/C Control. |
| Ford Aerostar (Van) | 1986 - 1994 | Throttle Cut Off, or Auxiliary. |
| Ford Bronco II | 1985 - 1988 | Throttle Cut Off. |
| Ford Ranger (Truck) | 1985 - 1989 | Throttle Cut Off. |
| Ford LTD Crown Victoria | 1990 - 1991 | Rectangular Relay (various functions). |
| Lincoln Mark VII / VIII | 1991 - 1993 | Control (various functions). |
| Mercury Tracer | 1991 - 1996 | A/C Control. |
