Colors below use Haltech's harness abbreviations: Y yellow, G green, GY grey, V violet, O orange, R red, W white, B black, BR brown, L blue. SHD means the wire is shielded. Always double check against your harness labels before pinning.
Crank and cam inputs
| Pin | Color | Function | Notes |
|---|---|---|---|
| 1 | Y (SHD) | Crank (Trigger) + | Works with reluctor or digital (Hall/optical) sensors |
| 5 | G (SHD) | Crank (Trigger) - | Reluctor ground reference |
| 2 | Y (SHD) | Cam (Home) + | Works with reluctor or digital sensors |
| 6 | G (SHD) | Cam (Home) - | Reluctor ground reference |
Analog inputs
| Pin | Color | Function | Notes |
|---|---|---|---|
| 3 | GY | AVI 7 (air temp) | 0-5V, 1k pull up selectable in software |
| 4 | V | AVI 8 (coolant temp) | 0-5V, 1k pull up selectable in software |
| 20 | O/G | AVI 5 | 0-5V, 1k pull up selectable in software |
| 12 | GY/O (SHD) | AVI 6, first O2 input | Narrowband compatible, 0-5V |
| 13 | GY/Y (SHD) | AVI 1, second O2 input | Narrowband compatible, 0-5V |
Speed and frequency inputs (SPI)
All four SPIs are shielded, accept up to 50 kHz and tolerate up to 25V DC.
| Pin | Color | Function |
|---|---|---|
| 8 | GY (SHD) | SPI 1 |
| 9 | GY/B (SHD) | SPI 2 |
| 10 | GY/BR (SHD) | SPI 3 |
| 7 | GY/R (SHD) | SPI 4 |
Power, grounds, output, knock and CAN
| Pin | Color | Function | Notes |
|---|---|---|---|
| 11 | R/W | +13.8V ECU supply | 12V feed into the ECU |
| 14, 15, 16 | B/W | Signal ground | Reference ground for sensors only |
| 19 | V/O | DPO 4 | Switches to ground, 1A max, fixed 12V pull up |
| 21 | GY/G | Knock 1 | For piezo knock sensors |
| 23 | W | CAN H | CAN high |
| 24 | L | CAN L | CAN low |
| 17, 18, 22, 25, 26 | - | Not used |
Wiring tips from the shop
- Keep the shield on trigger and SPI wires intact right up to the sensor connector. Most mystery trigger errors we chase come back to broken shielding or trigger wires routed next to coil leads.
- Signal grounds are for sensors. Don't use pins 14-16 to ground solenoids, relays or anything that carries real current.
- DPO 4 can switch 1A. Use it to drive a relay or a small solenoid, not a fuel pump directly.
- The O2 inputs are for narrowband sensors. For a wideband, use a CAN controller on pins 23 and 24.
The companion plug is covered in our Elite 1000 34-pin pinout. For full harness drawings, see the Elite 1000 26-pin wiring diagram and the Elite 1000 overview, or browse our wiring diagram downloads.
