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Guide to Automotive Wire and Fuse Sizes

Choose Fuse Amperage

Wire Size vs. Amperage

Wire Size:
8
10
12
14
16
18
20
Amperage:
35
25
20
15
7
5
3

Applications of Wire

Wire Size 6-Volt
Wire Size 12-Volt
Item
810Ampmeter gauge
810Alternator or generator and regulator large terminals
1214Electric fuel pump
1214Alternator or generator and regulator small terminals
1416Gauges, fuel, oil, temperature
1416Ignition, distributor, coil
1416Directional signals, parking and tail lights, and radio
1214Headlights

Plug-in Fuses (Type ATO)

Amperage:
3
5
7-12
10
15
20
25
30
Color:
Violet
Tan
Brown
Red
Lt. Blue
Yellow
Natural
Lt. Green

Fuse Listing Guide

Use:
Radio
Lighter
Stop Lights
Gauges
Overdrive
Heater
Tail/Parking
Interior Lighting
Wipers
Accessory
Amperage:
5
20
20
5
30
20
20
20
20
20
Choose Fuse Amperage