When installing a late-model gear reduction starter on a classic Chevrolet from 1955-72, certain wiring adjustments may be required. This guide explains how to wire the starter and electronic ignition system correctly, ensuring reliable engine starts.
Understanding the Starter Solenoid Connections
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Late-Model Gear Reduction Starters:
These typically feature:
- Large terminal: For the battery cable and ignition switch.
- Small terminal: For the "starter" wire.
Without connecting a starter wire to the ignition coil, the engine will not start as the coil will lack power while the engine turns over.
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Original 1955-56 Solenoids:
- Two terminals:
- Large terminal: For the battery cable and black wire to the ignition switch center.
- Smaller terminal: Starter terminal (connects to the ignition switch “SOL” terminal).
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1957-Up Solenoids:
- Three terminals:
- Large terminal: For the battery cable and black wire to the ignition switch.
- Smaller terminal (closest to the engine block): Starter terminal with a violet wire connecting to the ignition switch "start."
- Smaller terminal (farthest from the engine block): Starter terminal with a green wire that powers the ignition coil during engine cranking.
Ignition Switch Connections
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1955-56 Ignition Switch:
- SOL Terminal: Connected to the starter solenoid to engage the starter.
- IGN1 Terminal: Supplies power to the ignition coil while the engine runs.
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1957 Ignition Switch:
- SOL Terminal: Connected to the starter solenoid.
- IGN Terminal: Supplies power to the ignition coil when the engine runs.
Updating 1955-56 Wiring
Many 1955-56 cars have been upgraded to 1957-style solenoids and wiring. If this is the case:
- Identify the SOL (violet wire) and IGN1/IGN (brown or tan wire) terminals.
- To ensure power to the ignition coil during cranking and running, create a jumper wire between these terminals.
How to Create the Jumper Wire
- Use a 3M Scotch Lock connector or a short length of 14-gauge wire.
- Connect the SOL wire (violet) to the IGN1 (brown, 1955-56) or IGN (tan, 1957) wire.
- This setup ensures a steady 12-volt supply to the ignition coil in all conditions.
Parts List
- 18-213: 1955-57 Chevy Side Engine Mounts for Small Block V8.
- 26-42: Remote Power Steering Pump.