Nov 18, 2010, 7:42 pm · #1
Follow the pictures closely, as some wires repeat color thru the different connectors. READ.
Print this shit out, it will be much easier to follow.
VG CONNECTORS
MK1 CA20 CONNECTORS
NOTES
These connectors will be found where the CHASSIS harness connects to the ENGINE harness. Through these connectors, the ECU gets its power and communicates with the chassis.
The best thing to do is cut a chunk of the VG CHASSIS harness that plugs into the coil and reuse it. If you unwrap the wiring harness between the main 8 pin connector and the coil harness some of it is directly connected. If you can reuse it, great, its that much easier.
The EFI relay is controlled by the CHASSIS harness in MK1 CA20's so don't worry about its function, it is independent of the motor.
Fuel pump direct control can be reused, but an override fuel pump relay does not exist on MK1 CA20 cars. You can add one, or figure a way you desire for the fuel pump to run anytime the key is on. Realize in an accident the pump will continue to run, hence the factory's computer control.
The three wires for the VG ALTERNATOR (two fat white wires, they are the same, and one white/red wire for the charge light on the dash) will need to be stretched from the passenger's side (on four cylinder cars) to the driver's side. Match the wire thicknesses and colors, it would be easy and decently safe to run the wires along the VG's power steering lines down low.
The note 'BLK/WT@COIL' means you will need to use one of the BLACK/WHITE wires that fed the CA20 coils. It does not matter which coil, the intake one under the airbox is handy as the VG coil should bolt down right there easy. This wire is NOT in the two six pin MK1 CA20 CHASSIS harness. Make sure any leftover connectors (IE the other coil plugs etc) are isolated and wrapped/tucked where they cannot short or rub on anything.
TRANS/LOWER HARNESS
It would be easiest to use the VG's manual trans harness as it is. Just splice the four wires that are in the VG lower harness to the MK1 CHASSIS harness or connector- the colors are the same-
GREEN- 12v power to reverse light switch
GREEN/YELLOW- 12v from reverse light switch TO reverse lights
GREEN/ORANGE- neutral safety switch
BLACK- needs to be grounded. Does not need to connect to CHASSIS harness at all.
VG lower harness.
IF THE CAR WAS A MK1 AUTOMATIC CA20E
The automatic trans harness is simply the manual trans harness with a different connector for neutral safety/reverse switches (they are all in one in the range switch) and an ADDITIONAL harness wrapped in. If you unloom the auto trans lower harness and separate out the wiring that is auto-trans only (it will be obvious) and cut/splice or add connectors to replace the single 4 pin connector to go to two separate plugs (that is what the manual trans has) you'll be set.
