FuelTech FT500 pinout
ecurecovery.com/pinouts/fueltech/ft500 · Every pin checked against 2 FuelTech documents · data checked 2026-11-04
Pinout
FuelTech FT500 pinout
Every pin of the 24-pin 24-way and 16-pin 16-way connectors, with the wire colours of FuelTech's harness. Tap a pin to see what it does.
Every pin checked against 2 FuelTech documents- Connector 24-way · 24-pin
- Connector 16-way · 16-pin
FuelTech's documents list the pins but do not draw the plug, so we do not draw it either.
Pick any pin in the table to see its function and the documents it was checked in.
FuelTech FT500 connector 24-way pinout (24-pin)
| Pin | Function | Wire | FuelTech note |
|---|---|---|---|
| MAIN-1 | 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. |
| MAIN-2 | Blue output #6 | Blue #6Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| MAIN-3 | White input #7 | White #7White | Standard: oil pressure S t a n d a r d: c o o l a n t These inputs can be set up as any kind of Standard: fuel pressure analog or digital sensor. Standard: air temperature Standard: TPS signal |
| MAIN-4 | Blue output #7 | Blue #7Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| MAIN-5 | White input #6 | White #6White | Standard: oil pressure S t a n d a r d: c o o l a n t These inputs can be set up as any kind of Standard: fuel pressure analog or digital sensor. Standard: air temperature Standard: TPS signal |
| MAIN-6 | Blue output #8 | Blue #8Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| MAIN-7 | White input #5 | White #5White | Standard: oil pressure S t a n d a r d: c o o l a n t These inputs can be set up as any kind of Standard: fuel pressure analog or digital sensor. Standard: air temperature Standard: TPS signal |
| MAIN-8 | Magnetic RPM sensor reference | White wire from the 2 core shielded cableWhiteShielded | 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. |
| MAIN-9 | White input #4 | White #4White | Standard: oil pressure S t a n d a r d: c o o l a n t These inputs can be set up as any kind of Standard: fuel pressure analog or digital sensor. Standard: air temperature Standard: TPS signal |
| MAIN-10 | 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. By standard, Gray output #8 is used as a tachometer output. |
| MAIN-11 | White input #11 | White #11White | Standard: oil pressure S t a n d a r d: c o o l a n t These inputs can be set up as any kind of Standard: fuel pressure analog or digital sensor. Standard: air temperature Standard: TPS signal |
| MAIN-12 | 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. By standard, Gray output #8 is used as a tachometer output. |
| MAIN-13 | Blue output #3 | Blue #3Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| MAIN-14 | 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. By standard, Gray output #8 is used as a tachometer output. |
| MAIN-15 | Cam sync signal input | White wire from the 1 core shielded cableWhiteShielded | Connected to the cam sync sensor (hall or magnetic) - Use the shield as negative to the sensor |
| MAIN-16 | 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. By standard, Gray output #8 is used as a tachometer output. |
| MAIN-17 | RPM signal input | Red wire from the 2 core shielded cableRedShielded | 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, use the |
| MAIN-18 | 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. By standard, Gray output #8 is used as a tachometer output. |
| MAIN-19 | 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. |
| MAIN-20 | 5V output for sensors | Green/Red | 5V voltage output for TPS, electronic throttle and pedal sensors |
| MAIN-21 | 12V input from relay | Red | Connected to the pin 87 of the Main Relay. |
| MAIN-22 | Power ground input | Black/White | 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 |
| MAIN-23 | Blue output #2 | Blue #2Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
| MAIN-24 | Blue output #1 | Blue #1Blue | These outputs are usually used for injector control. When needed, they can be configured as auxiliary outputs. |
FuelTech FT500 connector 16-way pinout (16-pin)
| Pin | Function | Wire | FuelTech note |
|---|---|---|---|
| AUX-1 | White input #1 | White #1White | These inputs can be set up as any kind |
| AUX-2 | Gray output #6 | Gray #6Grey | Ignition output #6 can be configured as injector or auxiliary output |
| AUX-3 | White input #10 | White #10White | white #5, #7, #10 or #11. |
| AUX-4 | Gray output #7 | Gray #7Grey | Ignition output #7 can be configured as injector or auxiliary output |
| AUX-5 | White input #2 | White #2White | These inputs can be set up as any kind |
| AUX-6 | Blue output #4 | Blue #4Blue | Ignition output #7 can be configured as injector or auxiliary output |
| AUX-7 | White input #3 | White #3White | These inputs can be set up as any kind of analog or digital sensor. |
| AUX-8 | Blue output #5 | Blue #5Blue | wired to the battery negative terminal with no seams. Do not tap any |
| AUX-9 | Power ground inputs | Black/White | wired to the battery negative terminal with no seams. Do not tap any |
| AUX-10 | White input #9 | White #9White | white #5, #7, #10 or #11. |
| AUX-11 | Power ground inputs | Black/White | other grounds to this wire, it must run clean straight to the battery negative |
| AUX-12 | White input #8 | White #8White | MAP signal output can only be set up on |
| AUX-13 | Yellow output #1 | Yellow #1Yellow | Electronic throttle and step motor outputs. Also used as injection or |
| AUX-14 | Yellow output #2 | Yellow #2Yellow | Electronic throttle and step motor outputs. Also used as injection or |
| AUX-15 | Yellow output #3 | Yellow #3Yellow | Electronic throttle and step motor outputs. Also used as injection or |
| AUX-16 | Yellow output #4 | Yellow #4Yellow | Electronic throttle and step motor outputs. Also used as injection or |
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Check my map freeFuelTech FT500 pins at a glance
- Which pins are the crank and cam inputs on the FuelTech FT500?
- Magnetic RPM sensor reference: pin MAIN-8 (White wire from the 2 core shielded cable). Cam sync signal input: pin MAIN-15 (White wire from the 1 core shielded cable). RPM signal input: pin MAIN-17 (Red wire from the 2 core shielded cable).
- Which pins are the injector outputs on the FuelTech FT500?
- Blue output #6: pin MAIN-2 (Blue #6). Blue output #7: pin MAIN-4 (Blue #7). Blue output #8: pin MAIN-6 (Blue #8). Blue output #3: pin MAIN-13 (Blue #3). Blue output #2: pin MAIN-23 (Blue #2). Blue output #1: pin MAIN-24 (Blue #1). Blue output #4: pin AUX-6 (Blue #4). Blue output #5: pin AUX-8 (Blue #5).
- Which pins are the ignition outputs on the FuelTech FT500?
- Gray output #8: pin MAIN-1 (Gray #8). Gray output #5: pin MAIN-10 (Gray #5). Gray output #4: pin MAIN-12 (Gray #4). Gray output #3: pin MAIN-14 (Gray #3). Gray output #2: pin MAIN-16 (Gray #2). Gray output #1: pin MAIN-18 (Gray #1). Gray output #6: pin AUX-2 (Gray #6). Gray output #7: pin AUX-4 (Gray #7).
- Which pins are ground on the FuelTech FT500?
- Power ground input: pin MAIN-22 (Black/White). Power ground inputs: pins AUX-9, AUX-11 (Black/White).
- Which pins power the FuelTech FT500?
- 12V input from relay: pin MAIN-21 (Red).
- Which pins are the sensor supplies on the FuelTech FT500?
- 5V output for sensors: pin MAIN-20 (Green/Red).
FuelTech FT500 pinout sheet
A printable sheet with 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 manual for this ECU (harness connections table)
FuelTech FT450 / FT550 / FT600 manual, chapter 9: the old harness wire by wire
FuelTech connector drawing in the same manual, read by eye
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.
Where FuelTech's documents disagree
AUX 4: FuelTech's FT550 manual (chapter 9.4, the old FT500 harness wire by wire) leaves this wire out. The FT500 manual lists it in its pin table and on its connector drawing ('Gray #7').
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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