classicretrofit Posted January 21, 2024 Posted January 21, 2024 High Current Cabling See the next post for the wiring diagram. The red and black 16mm2 heavy cable is the main supply of current to the compressor. As supplied, the cables are joined at the red power post. If battery isolation is required, a contactor relay can be fitted. We supply an inline fuse holder and 80A fuse. The connection of the red supply cable between the battery + and contactor must be fused with the supplied 80A inline fuse. For safety, the connection of this cable to the battery should be the last you do on the install. This wire can carry up to 50A so it is important that cable cannot be pinched or the insulation chafed or broken. In the event that the red cable is shorted to ground, the fuse will blow. Of course, make sure all connections have good contact are securely fastened. PERSONAL INJURY, DEATH AND / OR PROPERTY DAMAGE HAZARD Failure to follow this warning could result in personal injury, death or property damage. Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause personal injury or property damage. Consult a qualified installer, service agency, or Classic Retrofit Ltd for assistance. Read and follow all instructions and warnings. Please consider your and other people's safety before installation. Disconnect the vehicle battery before installation!
classicretrofit Posted January 21, 2024 Author Posted January 21, 2024 WIRING LOOM The wiring loom consists of 6 separate parts: 1. Cabin Button Loom 2. Black ECU Loom 3. Grey ECU Loom 4. Condenser Fan loom 5. Condenser Fan relay loom 6. Temperature Sensor loom Please refer to the wiring diagram above
classicretrofit Posted January 21, 2024 Author Posted January 21, 2024 Black ECU Loom (1) Plug the black connector into the ECU. Find the short spur with the ground lug and attach to vehicle chassis. The longest spur needs to connect to the cabin control cable (black/white and brown/yellow) and the blower (orange). Route the loom in the car and attaching with spade connectors. Note that the blower orange wire can be found on the vehicle left side of the blower unit.
classicretrofit Posted January 21, 2024 Author Posted January 21, 2024 Grey ECU Loom (2) Plug the grey connector into the ECU. Identify the spur with the white and grey wires. Identify the condenser fan relay loom (it has a relay socket and ground lug). Plug the white wire into pin 86 of the relay socket. Find a suitable earth point for the lug and attach to chassis. Note: the relay on LHD compressors is sandwiched between the ECU and the compressor. Take the remaining spur to the fuse box area. The red wire should be wire to the fused side of permanent live. The yellow and yellow/black wires are wired to ignition live. The only remaining wires are blue/white, blue/yellow and blue/red. These are the compressor defeat lines. They are uses to slow the compressor when 12V is applied. This is useful to limit current on vehicles with lower output alternators. You may omit these if you have one of our high output alternators. Remember the wire you connected to the defogger switch? Connect this to blue/red. Connect blue/white to the main headlamp fuse. Connect blue/yellow to the wiper feed.
classicretrofit Posted January 21, 2024 Author Posted January 21, 2024 Isolation Relay (Contactor) If you have a isolator relay (contactor) fitted, wire the grey and the spare black wire to the relay coil terminals. Our standard contactor does not have a protection diode so it does not matter which terminal. Note: If the contactor relay you are using has a protection diode, the grey wire MUST be attached on the correct side of the diode (marked with a bar on the diode.
classicretrofit Posted January 21, 2024 Author Posted January 21, 2024 Button Loom The cabin button is NOT designed to be taken apart. If inserting through a panel, please note that you must feed the wires through from the front of the panel, and do not forget to feed the wiring through the nut. The button harness has 4 connections. Colour Connection Red Permanent or 12V Switched Live (ignition) Black GND Brown/Yellow LED status. To Brown/Yellow on Black Harness. Black/white AC On switch. To black/white on Black Harness.
classicretrofit Posted January 21, 2024 Author Posted January 21, 2024 The red wire is very low current so can be taken from the radio feed. The black wire can also ground in the cabin if convenient. Alternatively, run red through to fuse box. Our LED button is a momentary switch (press and release) and it has a blue ring right which indicates system status. Note: If you want to use an existing latching switch (toggle) you can wire this to the black/white wire. You must make sure that the ECU button setting is changed to ‘Latch’ or the system will not switch on/off correctly. See the separate Setup and Test Manual on the website. Temperature Sensors There are two temperature sensors, Cabin and Evaporator which have a 4 pin connector that plugs into the grey harness. You should have already installed this with the blower so just plug it in.
classicretrofit Posted January 21, 2024 Author Posted January 21, 2024 Appendix: ECU Wiring Details & Pinout Note: Your harness may not have a full set of wires depending on the installation. We supply the harness unsheathed for custom installations. Please group the wires and sheath them to suit your installation. Power Connections: 16mm2 170A wire. Red from battery with 80A inline fuse to input terminal on ECU. ECU Output terminal to terminal post or contactor (if fitted). Other side of post / contactor to compressor 12v Red. ECU, contactor and inline fuse have M6 studs. Peripheral connections at battery terminal are typically M6 too. Use 16mm2 M5 crimp terminals for ECU and fuse connections. Use 16mm2 M6 crimp terminals for contactor relay. Compressor Gnd (black) to chassis. Grey Connector Pinout (nc = not connected) Pin Colour Function Typical install 1 red Vfan Permanent Live 2 Green/red GPIO1 nc 3 Green/yellow GPIO2 nc 4 Green/white GPIO3 nc 5 blue ACcool nc 6 Blue/yellow ACdefeat2* Main beam* 7 Yellow/black VacControl Switched Live 8 Blue/red ACdefeat1* Wiper Full Speed* 9 yellow IGNon Switched Live 10 Blue/white ACdefeat3* Rear Screen Demister* 11 white FANpwrenable Condenser fan relay 12 grey COMPpwrenable Contact breaker relay * The 3 defeat signals tell the ECU whether to slow or stop the AC compressor. Wire them to the 12V feed for higher current accessories. In the above example, they are on the main beams, wiper full speed and the rear screen demister. These connections are not mandatory, the ECU can operate without them. Pins 11 and 12 both provide 12V to the relay coils. It is expected that the other side of the relay coils are connected to chassis. Please note if the relays have coil diodes fitted, the polarity of the connections is important (see electrical diagram).
classicretrofit Posted January 21, 2024 Author Posted January 21, 2024 Black connector pinout Pin Colour Function Typical install 1 Brown/red STATUSOp1 nc 2 Brown/yellow STATUSOp2 Cabin control led 3 Grey/red EVAPTemp Temp sensor 4 Grey/yellow CabinTemp Temp sensor 5 Black/blue ENCb nc 6 Black/white ENCSwitch Cabin control button 7 orange BLOWposn +ve on blower motor 8 black GND Chassis 9 Black/red ENCa nc 10 black GND Chassis 11 Brown/white StatusOp3 nc 12 black GND Chassis
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