Quote:
Originally Posted by pancake
Sorry for all the questions about the wiring.....but I really do not know what I am doing....I would welcome any help at all.
Thanks again  |
Ok here are all the pin outs and the color of the wires. My computer is the standard #1227747
A1- grn/wht- this wire is used to power the fuel pump-relay.
A2- no wire
A3- no wire
A4- gry- to egr-relay. This is a ground for the ECM to control the EGR relay.
A5- brn/wht- service soon light. This is a ground to turn on the light.
A6- pink/blk- switched 12v from the ignition relay.
A7- no wire
A8- ornange aldl serial data wire pin-e
A9- wht/blk-aldl pin B When jumpered to ground will set the computer to diagnostic mode.
A10- brn- VSS speed sensor signal to the computer, (This wire I will wire this to on side of a after market VSS sensor and the other wire on the sensor goes to ground).
A11- blk- MAP sensor ground.
A12- blk/wht- System ground. This wire is tied to other grounds in the harness and goes to engine ground.
B1- orn- 12v batt power ( I looked and traced down this wire on my 87 cab harness and this is fuesed I think it was a 15). I will probably use a inline fuse.
B2- tan/wht- Fuel pump signal from the relay. This one ties into several places, the fuel pump, the relay, and the ecm. When the relay is on it sends 12 volts to trun on the fuel pump.
B3- blk/red- Distributor plug
B4- no wire
B5- purple/wht- Distributor plug
B6- no wire
B7- blk- ESC signal This is the knock sensor signal to the computer.
B8- dk grn- AC signal. This tells the ECM that the AC is turned on. I am going to tie this into the ac clutch wire.
B9- no wire
B10-orange/blk- park neutral switch wire. some people say this is optional but I do not think it is because it gives a signal to the computer to give the engine a slight bump in rpm.(if you don't need it why did they put it there?)
B11- no wire
B12- no wire
C1- no wire
C2- brn- wire is not needed
C3-grn/blk- Idle air control
C4-grn/wht- Idle air control
C5-blue/wht- Idle air control
C6-blue/blk- Idle air control C3-C6 all go to the Idle air control valve plug on the TBI it's self.
C7- no wire
C8- no wire
C9- purple/wht-Starter crank signal wire. Goes to the small terminal of the starter.
C10- yel- Temp sender
C11- lt grn- Map sensor
C12- no wire
C13- dk blu- throtle position sensor
C14- gry- signal to map and TPS. ( you will see it tied together in the harness)
C15- on wire
C16- orange- This wire is tied with B1 so it is a 12volt wire
D1- brn/wht- system ground goes to the engine.
D2- blk- tied to the wires for the engine ground.
D3- no wire
D4- wht- distrbutor plug
D5- tan/blk- distrbutor bypass. This is the wire that you disconnect to set your timing.
D6- Tan- O2 sensor ground to engine.
D7- purple- plugs in to the o2 sensor
D8- D13 no wire
D14- grn- Injector plug plugs into the top of injector
D15- no wire
D16- blue- Injector plug plugs into the other injector
Above you will find where I labeled all the pinouts for this computer. It will give you a good idea where all the wires go.
#1 Yes
#2 I tied all the grounds together and Put them on the back of the driverside head with a #8 wire. Then I grounded the motor on the firewall and the frame.
#3 A-6 is switched 12volts from Ignition relay. I also fused this with a 10 amp fuse.
#4 This is basically the same wire they are tied together with in the harness. I used a in line fuable link with a 15 amp fuse in it and ran it to the main Junction on the firewall.
#5 I tied this wire to the stock power wire for the hei dizzy. I did not fuse this.
#6 You can ground it but the computer will think that the truck will be in park at all times and idel high. I left it hanging untill I got a vss sensor from jags that run and installed it then. It will only turn the check engine light on. It might also make the truck die as you come to a stop. (but mine never did)
#7 Same side of the starter that the other sm wires that is on your starter that is there now. This just tells the cpu that the engine is cranking over and to turn the fuel pump relay on.
As for the 4 wire o2 sensor I have not done this but plan on to. I am sure R/F willl chime in and tell you what you need to know about that.
I hope this helps you out. Any more ?'s just ask we will get to you eventually.
Soory for the delay I have been busy.
Good luck, Jamie