4hl1 Injector Wiring Diagram [repack] Here

Blown ECM fuse (if applicable) or extreme current draw.

If you are experiencing codes like , the problem is likely in the physical wiring rather than the injector itself. 4hl1 injector wiring diagram

| Cylinder | Injector (-) Wire Color | ECM Connector Pin (Example) | |----------|------------------------|-----------------------------| | #1 | Yellow | C27 (or A21) | | #2 | Blue | C28 (or A22) | | #3 | Green | C29 (or A23) | | #4 | Brown | C30 (or A24) | Blown ECM fuse (if applicable) or extreme current draw