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Suzuki Samurai ECM Power & Ground Wiring Diagram - Main Relay, Fuses, Pinout
Reference · 1986-1995 SamuraiAll 73 wiring diagrams
Factory wiring diagram of the ECM power supply through the main relay and fuses with relay coupler and connector terminal pinouts.
Part of 1986-1995 Suzuki Samurai Wiring Diagrams
This document is a wiring diagram page covering the power supply and ground circuits for the Engine Control Module (ECM), uploaded as part of a Suzuki Samurai reference set. A numbered legend identifies eight components: the main fuse, ignition switch, circuit fuse for the ignition coil, circuit fuse for the ECM, main relay, ECM, engine ground for the ECM, and the terminal position of the relay coupler (viewed from the wire side). The schematic traces power from the battery through the main fuse and ignition switch, through circuit fuses, to the main relay and then to the ECM. Wire color codes are labeled: B/W (from the ignition coil fuse), B/R (to the main relay circuit), Bl and Bl/B (from the main relay to ECM terminals A10, A12, and A13), and B/Bl and B/G (from ECM terminals B1 and B2 to the engine ground). Inset illustrations show the physical mounting locations of the ECM behind the dash and the engine ground point, plus a pin-out view of the ECM connector identifying terminals A10, A12, and A13. The relay coupler detail shows terminals A, B, C, and D.
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Frequently asked questions
- What wire colors supply power to the ECM from the main relay?
- The diagram shows a Bl (blue) wire from the main relay and Bl/B wires feeding ECM terminals A10, A12, and A13.
- Which ECM terminals go to engine ground?
- Terminals B1 (B/Bl wire), B2 (B/G wire), and B14 are shown running to the engine ground for the ECM (item 7).
- What components are in the ECM power circuit?
- The legend lists the main fuse, ignition switch, circuit fuse for the ignition coil, circuit fuse for the ECM, main relay, ECM, engine ground for ECM, and the relay coupler terminal positions.
- What are the main relay coupler terminal positions?
- The relay coupler detail (item 8, viewed from the wire side) shows four terminals labeled A, C, B, and D.
- Which wire color runs from the ignition coil circuit fuse?
- A B/W (black/white) wire runs from the circuit fuse for the ignition coil toward the ignition switch circuit.
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