| A.T.A.Recommended Circuit Color Coding | |
| White | Ground return towing vehicle |
| Black | ICC Required marker andclearance lamps |
| Yellow | Left-hand directional signalandhazard lamp |
| Red | Stop lamp and anti-wheel lockdevice |
| Green | Right-hand directional signaland hazard lamp |
| Brown | Tail lamp, three-bar markerlamps and clearance or marker lamps other than ICC required licenselamps |
| Blue | Auxiliary Circuits |
| 4Conductor Trailer Cable | ||||
| Gauge | PartNo. | |||
| 16 Gauge 4 Conductor | 234101 | |||
| 14 Gauge 4 Conductor | 234102 | |||
| Colorsin the 4 Conductor Cable | Black | Brown | Red | White |
| 6Conductor Trailer Cable | ||||||
| Gauge | PartNo. | |||||
| 16 Gauge, 6 Conductors | 234201 | |||||
| 14 Gauge, 6 Conductors | 234202 | |||||
| Colorsin the 6 Conductor Cable | Black | Brown | Green | Red | White | Yellow |
| 7Conductor Trailer Cable | |||||||
| Gauge | PartNo. | ||||||
| 14 Gauge, 7 Conductors (Con.) | 234301 | ||||||
| 14 Gauge 6 Con.,12 Gauge 1 Con. (White) | 234302 | ||||||
| 14 Ga 4 Con.,12 Ga 1 Con. (Blue),10 Ga 2 Con. (Black & White) | 234303 | ||||||
| 12 Gauge 6 Con.,10 Gauge 1 Con. (White) | 234304 | ||||||
| Colorsin the 7 Conductor Cable | Black | White | Brown | Red | Green | Yellow | Blue |
