FuelTech FT550 pinout
ecurecovery.com/pinouts/fueltech/ft550 · Every pin checked against at least two of 4 FuelTech documents · data checked 2026-11-04
Pinout
FuelTech FT550 pinout
Every pin of the 26-pin A and 26-pin B connectors, with the wire colours of FuelTech's harness. Tap a pin to see what it does.
Every pin checked against at least two of 4 FuelTech documentsPick any pin on the drawing or in the table to see its function, its wire colour and the documents it was checked in.
FuelTech FT550 connector A pinout (26-pin)
| Pin | Function | Wire | FuelTech note |
|---|---|---|---|
| A1 | Blue output #1 | Blue #1Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| A2 | Blue output #2 | Blue #2Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| A3 | Blue output #3 | Blue #3Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| A4 | Blue output #4 | Blue #4Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| A5 | Blue output #5 | Blue #5Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| A6 | Blue output #6 | Blue #6Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| A7 | Power ground input | Black/white | Directly wired to the battery negative terminal with no seams. Do not tap any other grounds to this wire, it must run clean straight to the battery negative terminal. |
| A8 | Gray output #1 | Gray #1Grey | These outputs are usually used for ignition control. When needed, they can be set up as injector outputs or auxiliary outputs. |
| A9 | Gray output #2 | Gray #2Grey | These outputs are usually used for ignition control. When needed, they can be set up as injector outputs or auxiliary outputs. |
| A10 | Gray output #3 | Gray #3Grey | These outputs are usually used for ignition control. When needed, they can be set up as injector outputs or auxiliary outputs. |
| A11 | Gray output #4 | Gray #4Grey | These outputs are usually used for ignition control. When needed, they can be set up as injector outputs or auxiliary outputs. |
| A12 | Battery negative input | Black | Connected directly to the battery negative with no seams. Do not connect this wire to the chassis, engine block or head. |
| A13 | 12V input from relay | Red | Connected to the pin 87 of the Main Relay |
| A14 | 5V outputs for sensors | Green/Red | 5V voltage output for TPS, electronic throttle and pedal sensors |
| A15 | CAN A (-) | Yellow/Blue | |
| A16 | CAN A (+) | White/Red | |
| A17 | CAM sync signal input | Shielded Cable (white)WhiteShielded | Connected to the cam sync sensor (hall or magnetic) |
| A18 | Magnetic RPM sensor reference | Black Shielded Cable (White)WhiteShielded | Connected to the negative wire of the magnetic sensor. When OEM ECU is reading the sensor in parallel, split this wire with OEM sensor negative - Do not connect when using hall effect sensor. |
| A19 | RPM signal input | Black Shielded Cable (Red)RedShielded | Connected to the crank trigger sensor (hall or magnetic) or to the distributor. To VR sensors, use the shield wire the sensor shield. To Hall sensor, do not use the shield as negative |
| A20 | Input #1 | White #1White | Sensors input |
| A21 | Input #2 | White #2White | Sensors input |
| A22 | Input #3 | White #3White | Sensors input |
| A23 | Input #4 | White #4White | Sensors input |
| A24 | Input #5 | White #5White | Sensors input |
| A25 | Input #6 | White #6White | Sensors input |
| A26 | Input #7 | White #7White | Sensors input |
FuelTech FT550 connector B pinout (26-pin)
| Pin | Function | Wire | FuelTech note |
|---|---|---|---|
| B1 | Power ground inputs | Black/White | Directly wired to the battery negative terminal with no seams. Do not tap any other grounds to this wire, it must run clean straight to the battery negative terminal. |
| B2 | Power ground inputs | Black/White | Directly wired to the battery negative terminal with no seams. Do not tap any other grounds to this wire, it must run clean straight to the battery negative terminal. |
| B3 | CAN B (-) | Yellow/Blue | |
| B4 | CAN B (+) | White/Red | |
| B5 | Input #8 | White #8White | Sensors input |
| B6 | Input #9 | White #9White | Sensors input |
| B7 | Input #10 | White #10White | Sensors input |
| B8 | Blue output #7 | Blue #7Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| B9 | Blue output #8 | Blue #8Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| B10 | Gray output #5 | Gray #5Grey | These outputs are usually used for ignition control. When needed, they can be set up as injector outputs or auxiliary outputs. |
| B11 | Gray output #6 | Gray #6Grey | These outputs are usually used for ignition control. When needed, they can be set up as injector outputs or auxiliary outputs. |
| B12 | Input #11 | White #11White | Sensors input |
| B13 | Input #12 | White #12White | Sensors input |
| B14 | Blue output #9 | Blue #9Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| B15 | Blue output #10 | Blue #10Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| B16 | Gray output #7 | Gray #7Grey | These outputs are usually used for ignition control. When needed, they can be set up as injector outputs or auxiliary outputs. By standard, Gray output #8 is used as a tachometer output. (FT550) |
| B17 | Gray output #8 | Gray #8Grey | These outputs are usually used for ignition control. When needed, they can be set up as injector outputs or auxiliary outputs. By standard, Gray output #8 is used as a tachometer output. (FT550) |
| B18 | Input #13 | White #13White | Sensors input or Power Shift Input - Blue wire Strain gage sensor (positive) |
| B19 | Input #14 | White #14White | Sensors input or Power Shift Input - Orange wire Strain gage sensor (negative) |
| B20 | Blue output #11 | Blue #11Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| B21 | Blue output #12 | Blue #12Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| B22 | Yellow output #1 | Yellow #1Yellow | Electronic throttle and step motor outputs. Also used as injection or auxiliary outputs (cooling fan, fuel pump, etc.) |
| B23 | Yellow output #2 | Yellow #2Yellow | Electronic throttle and step motor outputs. Also used as injection or auxiliary outputs (cooling fan, fuel pump, etc.) |
| B24 | Yellow output #º3 | Yellow #3Yellow | Electronic throttle and step motor outputs. Also used as injection or auxiliary outputs (cooling fan, fuel pump, etc.) |
| B25 | Yellow output #4 | Yellow #4Yellow | Electronic throttle and step motor outputs. Also used as injection or auxiliary outputs (cooling fan, fuel pump, etc.) |
| B26 | Ground for sensors | Green/Black | Connected the sensors ground |
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Check my map freeFuelTech FT550 pins at a glance
- Which pins are CAN on the FuelTech FT550?
- CAN A (-): pin A15 (Yellow/Blue). CAN A (+): pin A16 (White/Red). CAN B (-): pin B3 (Yellow/Blue). CAN B (+): pin B4 (White/Red).
- Which pins are the crank and cam inputs on the FuelTech FT550?
- CAM sync signal input: pin A17 (Shielded Cable (white)). Magnetic RPM sensor reference: pin A18 (Black Shielded Cable (White)). RPM signal input: pin A19 (Black Shielded Cable (Red)).
- Which pins are the injector outputs on the FuelTech FT550?
- Blue output #1: pin A1 (Blue #1). Blue output #2: pin A2 (Blue #2). Blue output #3: pin A3 (Blue #3). Blue output #4: pin A4 (Blue #4). Blue output #5: pin A5 (Blue #5). Blue output #6: pin A6 (Blue #6). Blue output #7: pin B8 (Blue #7). Blue output #8: pin B9 (Blue #8). Blue output #9: pin B14 (Blue #9). Blue output #10: pin B15 (Blue #10). Blue output #11: pin B20 (Blue #11). Blue output #12: pin B21 (Blue #12).
- Which pins are the ignition outputs on the FuelTech FT550?
- Gray output #1: pin A8 (Gray #1). Gray output #2: pin A9 (Gray #2). Gray output #3: pin A10 (Gray #3). Gray output #4: pin A11 (Gray #4). Gray output #5: pin B10 (Gray #5). Gray output #6: pin B11 (Gray #6). Gray output #7: pin B16 (Gray #7). Gray output #8: pin B17 (Gray #8).
- Which pins are ground on the FuelTech FT550?
- Power ground input: pin A7 (Black/white). Power ground inputs: pins B1, B2 (Black/White).
- Which pins power the FuelTech FT550?
- 12V input from relay: pin A13 (Red).
- Which pins are the sensor supplies on the FuelTech FT550?
- 5V outputs for sensors: pin A14 (Green/Red).
FuelTech FT550 pinout sheet
A printable sheet with the connector drawings and every pin, made from the checked data on this page.
Where this comes from
Only FuelTech's own documents. Pin names and notes are written exactly as FuelTech writes them.
FuelTech FT450 / FT550 / FT550LITE / FT600 manual
FuelTech 4 cylinder universal harness manual
FuelTech 6 cylinder universal A harness manual
FuelTech Sportsman data logging A harness manual
FuelTech PRO550 wiring harness manual
How we checked it
- We start from the pin table in FuelTech's manual for this ECU: pin, wire colour and function.
- Every pin is read again in a second FuelTech document: its harness manuals, which list each ECU pin with its wire colour, or for the FT700 its quick reference. A script compares them pin by pin.
- A pin is only shown when the second document gives the same wire colour and function. FuelTech names its general-purpose wires by colour and number (Blue #1 is blue output 1), so the number has to match too.
- Labels, notes and wire colours are written exactly as FuelTech writes them.
ECU Recovery is not affiliated with FuelTech. FuelTech and its product names are trademarks of FuelTech. If your harness came with its own diagram, check your wiring against it.
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