Haltech FD wiring questions; road speed, tach, WB O2
Thread Starter
Junior Member
Joined: May 2007
Posts: 11
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From: WY
FD wiring questions; road speed, tach, WB O2
I am nearing the end of the haltech (E8) instal and have a few wires to connect before I am finished. First of all can anyone tell me were to connect so haltech can read road speed? Also, were can I connect so my stock tacho works? I don't have the wiring diagram for my 93 so any help would be greatly appreciated.
I am also installing the Haltech digital display but the connection description is far from clear. Has anyone conected this? There are two serial plugs (similar to the Wideband O2 sensor harness, but the kit only comes with one connection wire) and there is a black wire and a red wire (backlighting or LED indicator of some sort i dont know).
I am also installing the Haltech digital display but the connection description is far from clear. Has anyone conected this? There are two serial plugs (similar to the Wideband O2 sensor harness, but the kit only comes with one connection wire) and there is a black wire and a red wire (backlighting or LED indicator of some sort i dont know).
Thread Starter
Junior Member
Joined: May 2007
Posts: 11
Likes: 0
From: WY
The Innovate Motorsports website has all the documentation for the wideband kit that haltech is using.
The road speed and tacho hookups still eludes me. On Haltech: timed input for road speed and PWM 3 for tacho. Where do i hook these wires onto my FD?
The road speed and tacho hookups still eludes me. On Haltech: timed input for road speed and PWM 3 for tacho. Where do i hook these wires onto my FD?
Racerxrx7
Joined: Mar 2002
Posts: 427
Likes: 0
From: Orlando, FL
My PLX device has this diagram.
Send me an email at racerxrx77@gmail.com and I will send you the file that shows the pins on the stock harness.
Aldo
ECU Pinout Diagram
Connector 4 Connector 3 Connector 2 Connector 1
Aldo
ECU Pinout Diagram
Connector 4 Connector 3 Connector 2 Connector 1
Connector 1
Pin #
Name
Function
Signal Type
1B
Power Source
12V switched
Power
1M
Vehicle Speed Sensor
Vehicle speed sensor signal
Speed
1O
MAP Sensor
Manifold absolute pressure sensor signal
Analog
1S
Brake Switch
Brake switch signal
Analog
Connector 2
Pin #
Name
Function
Signal Type
2B
Tachometer output
Tachometer output signal
Speed
Connector 3
Pin #
Name
Function
Signal Type
3C
Primary O2 Sensor
Primary oxygen sensor signal
Analog
3E
Engine Coolant Temperature Sensor
Engine coolant temperature sensor signal
Analog
3F
Throttle Position Sensor
Throttle position sensor signal
Analog
3L
Intake Air Temperature Sensor
Air temperature sensor signal
Analog
3M
Knock Sensor
Engine knock sensor
Knock, Audio
Connector 4
Pin #
Name
Function
Signal Type
4A
Power Ground
Chassis ground
Ground
4B
Power Ground
Chassis ground
Ground
4C
Power Ground
Chassis ground
Ground
Caution!
If you are not familiar with the vehicle’s electrical systems, onboard sensors, and vehicle dynamics, DO NOT attempt to perform ANY installation of PLX Devices Inc. product(s). PLX Devices Inc. does not guarantee 100% accuracy, compatibility and specific application functionality of these documents. Use these documents as guidelines ONLY and refer to your vehicle’s service manual for detailed information.
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