The conventional colour-coding for this loom is as follows:
| Blue | Petrol injector A negative |
| Blue with a black trace | Petrol injector A to petrol ECU |
| Red | Petrol injector B negative |
| Red with a black trace | Petrol injector B to petrol ECU |
| Green | Petrol injector C negative |
| Green with a black trace | Petrol injector C to petrol ECU |
| Yellow | Petrol injector D negative |
| Yellow with a black trace | Petrol injector D to petrol ECU |
| Red with a white trace | Petrol injector positive |
Recent supplies of this loom have a different colour coding:
| Blue | Petrol injector A negative |
| Blue with a white trace | Petrol injector A to petrol ECU |
| Red | Petrol injector B negative |
| Purple with a white trace | Petrol injector B to petrol ECU |
| Green | Petrol injector C negative |
| Green with a white trace | Petrol injector C to petrol ECU |
| Yellow | Petrol injector D negative |
| Yellow with a white trace | Petrol injector D to petrol ECU |
| White | Petrol injector positive |