Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCADILLAC1993FLEETWOOD BROUGHAM V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTDIAGRAMSELECTRICAL DIAGRAMSELECTRONIC/POWERTRAIN CONTROL MODULE (ECM/PCM)ELECTRONIC/ENGINE CONTROL MODULE (ECM)
1993 Cadillac Fleetwood Brougham V8-350 5.7L
Electronic/Engine Control Module (ECM)
1993 Cadillac Fleetwood Brougham V8-350 5.7LSECTION Electronic/Engine Control Module (ECM)
ECM Wiring Diagram:
A4 = TCC CONTROL
D6 = DIAGNOSTIC TEST TERMINAL
C2 = ENGINE GROUND
C3 = ENGINE GROUND
C13 = O2 SENSOR GROUND
C11 = SERIAL DATA
D9 = POLL REQUEST - HVAC
D15 = IAT SIGNAL
D2 = IAT AND MAP SENSOR GROUND
C10 = MAP SENSOR SIGNAL
D4 = 5 VOLT REF
D16 = ECT SENSOR SIGNAL
D3 = ECT, TP SENSOR AND TP MODULE GROUND
C5 = TP SENSOR SIGNAL
C4 = 5 VOLT REF - TP SENSOR
C14 = O2 SENSOR SIGNAL
C13 = O2 SENSOR GROUND
D5 = KNOCK SENSOR SIGNAL
B1 = POWER STEERING PRESSURE SWITCH SIGNAL
ECM Wiring Diagram:
D1 = BATTERY FEED
A1 = FUEL PUMP RELAY DRIVER
D7 = FUEL PUMP VOLTAGE MONITOR
C16 = INJECTOR #1 DRIVER
C1 = IGNITION FEED
C15 = INJECTOR #2
C6 = IAC COIL
C7 = IAC COIL
C9 = IAC COIL
C8 = IAC COIL
D11 = IGNITION CONTROL
D14 = IGNITION REFERENCE
D12 = IGNITION BYPASS
D13 = IGNITION LOW
ECM Wiring Diagram:
A4 = TCC SOLENOID
B3 = 4TH GEAR SIGNAL
B11 = VSS SIGNAL
A10 = AIR BYPASS VALVE CONTROL
A11 = EGR SOLENOID CONTROL
A9 = EVAP CANISTER PURGE CONTROL
A10 = SECONDARY AIR INJECTOR PUMP RELAY CONTROL
ECM Wiring Diagram:
A7 = MALFUNCTION INDICATOR LAMP CONTROL
A5 = CHANGE OIL LIGHT CONTROL
B2 = PARK/NEUTRAL POSITION SIGNAL
D8 = FUEL ENABLE
ECM Wiring Diagram:
A12 = A/C MONITOR
B12 = A/C REQUEST
A8 = A/C DISABLE RELAY
A2 = PRIMARY COOLING FAN CONTROL (W/O V08 OPTION)
A3 = SECONDARY COOLING FAN CONTROL (W/O V08 OPTION)
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.