BASIC 2 and 3 WIRE SYSTEMS
2 Wire System
- Are vehicles that have the turn signal and brake lights operating
on the same bulb and wire.
- It will have an electrical code of "A" in the paper catalog.
3 Wire System
- Are vehicles that have the turn signal and brake light use different
bulbs and wires.
- It will have an electrical code of "B" in the paper catalog.
Estimating Trailer Amperage Per Circuit:

Trailer Light Current Paths
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