WIRING DIAGRAMS SERVICE MANUAL NUMBER 23
Page 4E-16 90-861326--1 MARCH 1999
MEFI 3 MCM (Sterndrive) 454 / 502 Mag MPI and MIE (Inboard) 454 Mag MPI
Horizon and 8.2L MPI Models
NOTE: All BLACK wires with a ground symbol are interconnected within the EFI system
harness.
NOTE: Component position and orientation shown is arranged for visual clarity and ease
of circuit identification.
76001
1
2
3
4
5
6
7
10
11
12
13
14
15
16
17
18
8
19
9
1-Fuel Pump
2-Distributor
3-Coil
4-Knock Sensor (KS) Module
5-Data Link Connector (DLC)
6-Manifold Absolute Pressure (MAP) Sensor
7-Idle Air Control (IAC)
8-Throttle Position (TP) Sensor
9-Engine Coolant Temperature (ECT) Sensor
10 - Electronic Control Module (ECM)
11 - Fuel Pump Relay
12 - Ignition/System Relay
13 - Fuses (15 Amp) Fuel Pump, (15 Amp) ECM /
DLC / Battery, (10 Amp) ECM / Injector /
Ignition / Knock Module
14 - Harness Connector To Starting/Charging
Harness
15 - Positive (+) Power Wire To Engine Circuit
Breaker
16 - Oil Pressure (Audio Warning System)
17 - Load Anticipation Circuit
18 - Water Temperature Sender
19 - Gear Lube Bottle (Not used on Inboard
models)
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