I need to know what the tach signal/rpm, the throttle position, ign on and ground wires are on a 90 dx hatch with a dual port all stock wiring and such. What colors are these? thanks for any help. I tried looking in my $60 factory service manual and cant find it.
thanks,
Wil

 

Any one got anything on this?

 

at the 2-wire connector at the distributor, the blue wire is the tach signal which goes to the gauge cluster and the black/yellow wire is power with ignition on which comes from the ignition switch thru fuse #13 in the under dash fuse box

at the TPS, yellow/white is the 5 volt reference signal and goes to ECU pin C13, green/white is sensor ground and goes to ECU pin C12 and red/blue is the TPS signal and goes to ECU pin C7

there are lots of different ground wires at the ECU, like black wires at pins A2 & A4 are grounds for the main relay, brown/black at A16 and black/red at A18 are grounds for the shielding for the distributor wiring and O2 sensor wiring, green/white at C11 is ground for MAP sensor, green/white at C12 is ground for a lot of the other different sensors - what ground are you looking for?

 

Any ground or ign on would work. I found my answers finally and wrote it all down for any one else looking for these wires. It was a head ache but here we go.

this is all you need. a basic obd-0 ecu pinout,
Wiring Colors and Functions
DPFI MPFI
Pin # Wire Color Function Wire Color Function
A1 Yellow 2 Aux Injector Brown #1 Injector
A2 Black 1 Main Relay/Ground Black 1 Main Relay/Ground
A3 Yellow 1 Aux Injector Red #2 Injector
A4 Black 2 Main Relay/Ground Black 2 Main Relay/Ground
A5 Red 2 Main Injector Light Blue #3 Injector
A6 Green Purge Cut Off Solenoid Valve (Coil) Green Purge Cut Off Solenoid Valve (Coil)
A7 Red 1 Main Injector Yellow 1 #4 Injector
A8 Yellow 3 Sedan LX A/T
A10 Red EGR Solenoid Control Valve (Coil) (A/T only)
A11 Blue/Yellow EACV (Coil) Blue/Yellow EACV (Coil)
A12 Green/Black 2 Main Relay Green/Black 2 Main Relay
A13 Yellow/Black 2 Main Relay Yellow/Black 2 Main Relay/Injector Resistor Box
A14 Green/Black 1 Main Relay Green/Black 1 Main Relay
A15 Yellow/Black 1 Main Relay Yellow/Black 1 Main Relay/Injector Resistor Box
A16 Brown/Black Ground Brown/Black Ground
A17
A18 Black/Red Ground Black/Red Ground
DPFI MPFI
Pin # Wire Color Function Wire Color Function
B1 White/Green Hazard Fuse White/Green Hazard Fuse
B2 Orange Tandem Control Solenoid Valve Blue 1 Fast Idle Control Solenoid Valve
B3 Yellow A/C Clutch Relay Yellow A/C Clutch Relay
B4 Yellow/Green Radiator Fan Relay Yellow/Green Radiator Fan Relay
B5 White/Yellow Alternator White/Yellow Alternator
B6 Green/Orange Check Engine Warning Light Green/Orange Check Engine Warning Light
B7 Green/Orange A/T Shift Position Console Switch (Park, Neutral)
B8 Blue/Red A/C Switch Blue/Red A/C Switch
B9
B10 Orange Crank Angle Sensor
B11 Green/Black A/T Shift Position Console Switch (Drive)
B12 White Crank Angle Sensor
B13 Blue White Main Relay Blue White Main Relay
B14 Blue 2 To Yellow, To Alternator Blue 2 Alternator
B15 White 1 Ignitor Unit White 1 Ignitor Unit
B16 Yellow/Red Speed Sensor Yellow/Red Speed Sensor
B17 White 2 Ignitor Unit White 2 Ignitor Unit
B18
B19 Green/Red Electric Load Detector Green/Red Electric Load Detector
B20 Brown Ignition Timing Adjusting Connector Brown Ignition Timing Adjusting Connector
DPFI MPFI
Pin # Wire Color Function Wire Color Function
C1 Orange Crank Angle Sensor Blue/Green Cylinder Position Sensor
C2 White 4 Crank Angle Sensor Blue/Yellow Cylinder Position Sensor
C3 Orange/Blue TDC Sensor Orange/Blue TDC Sensor
C4 White/Blue TDC Sensor White/Blue TDC Sensor
C5 Red/Yellow TA Sensor Red/Yellow TA Sensor
C6 Red/White 1 TW Sensor Red/White 1 TW Sensor
C7 Red/Blue Throttle (Position) Angle Sensor (TPS) Red/Blue Throttle (Position) Angle Sensor (TPS)
C8 Yellow EGR Lift Valve Sensor
C9 Red/White 2 PA Sensor Red/White 2 PA Sensor
C10 Green/White 3 Brake Switch Green/White 3 Brake Switch
C11 White 1 MAP Sensor White 1 MAP Sensor
C12 Green/White 2 EGR Lift Valve Sensor/Pa Sensor/Ignition Timing Adjusting Connector/TA Sensor/TPS Sensor/TW Sensor Green White 2 Pa Sensor/Ignition Timing Adjusting Connector/TA Sensor/TPS Sensor/TW Sensor
C13 Yellow/White EGR Lift Valve Sensor/Pa Sensor/TPS Sensor Yellow/White Pa Sensor/TPS Sensor
C14 Green/White 1 MAP Sensor Green/White 1 MAP Sensor
C15 Yellow/Red MAP Sensor Yellow/Red MAP Sensor
C16 White 3 O2 Sensor White 3 O2 Sensor

ok now off the top of my head heres what i can remember about the vafc harness

pink is vtec selinoid

yellow and white are used for the map sensor. not needed if you just want to use vtec settings. only used to correct fuel

brown and black are grounds, put them to any ground wire off the a pin at the ecu

orange and red are power wires. put them both to the 12v sorce on the a plug at the ecu

grey is throttle position sensor

green is rpm signal

thats all i can think of off the top of my head. sorry. but im pretty sure this is all you need