Converting VN/VP To Climate Control

[Piston 304Participant SAVN 5L, VP Inter. View build HERE Member since: April 29, 2015 Posts: 52]

Not my write up, just something i followed. I’ve corrected a few mistakes and made some things clearer.
Can add pics if needed.

 
Parts Required
Climate heater box and wiring.
Ambient temp sensor.
Solar sensor.
Climate unit.
VN/VP Auto trans loom plug.
Wiring/Tools.
Removing Dash
Step 1: Disconnect Negative Battery Terminal.
Step 2 Remove center console.
Step 3: Remove Head unit.
Step 4: Remove dash cluster.
Step 5: Remove glove box.
Step 6: Remove lower trim panel (Under dash).
Step 7: Remove kick panel.
Step 8: Disconnect dashboard wiring.
Step 9: Remove center fascia.
Step 10: Remove dash end covers.
Step 11: Remove air vents.
Step 12: Remove speaker covers.
Step 13: Remove demister grill.
Step 14: Remove speakers.
Step 15: Disconnect heater ducts.
Step 16: Separate wiring from dashboard, remembering where everything goes.
Step 17: Remove dash.
HVAC Box Swap and Wiring
Step 18: De-Gas A/C System. Remove HVAC (Heater) Box. A/C pipes are under wiper panel. Use the new heater box to check where the screws are, there is 2 bolts above the transmission tunnel, one each side… 1 screw is hard to get to in particular, it is on the drivers side of the HVAC box up the top facing straight up As said, check the new HVAC box to see exactly where it is. Take note of which Vacuum line goes where as well. (2 lines that run through the firewall).
Step 19: Replace with climate HVAC (Heater) Box. Hardest part is getting the Heater Hoses through the firewall. Also, make sure the bottom hoses sit in the holes in the floor otherwise the water that comes out of these evaporator hoses will end up behind your carpet!

Step 20: Solder the wires that go to the A/C switch together. The colours of the wires are black, brown/white, green/yellow and green/black. However you only want to join the green/yellow and green/black together, the brown white and black just cover with electrical tape.

Step 21: Wire up the wires on the adapter plug, the green one that the loom from the climate box plugs into. I used and old VN -VP auto trans wiring connector so I didn’t have to cut the climate wiring. There are 10 wires:
Orange/White – Positive. Connects to Fuse 1. (Constant power)
Brown/White – Dash Lights. Fuse 7. (Dash light Switched)
Black/White – Earth.
Black – Earth.
Pink/Green – Make a new fused connection. Run the wire to the BIG Red and Black wire behind the fuse box. (Ignition Switched),
Brown – See step 27.
Light Green/Yellow – Solar Sensor. Connect to Solar Sensor in the dash. See Step 25 also.
Light Green/Black – Ambient Temp Sender Wire. Connect to Ambient Temperature Sensor at front of car.
Brown/Black – Earth for Solar Sensor and Ambient Temperature Sensor. Splice the earth wires from the 2 sensors into this 1 wire.
Yellow/Black – Blower Relay Trigger. See Step 24.

Step 22: Connect 3 wires together from one of the plugs that went into the manual air con fan speed controller, the colours that you want to join are the green/yellow, pink/white and light green.
Go across to your fuse box and look at the Blower Fan Relay, it should have the following 4 wires going into it, light green, red, black and violet yellow. Cut the black wire with enough room to join another wire to it. Then run a wire from the yellow/black wire on the climate plug across to the fuse box and connect it to the black wire going into the relay. (This controls fan speed of the climate system).

Re wire the Blower Fan Relay by connecting the black wire from the fan (very thick wire) to the red wire that was on relay terminal No 30.
Connect the yellow/black (cut black wire) to terminal No 86.
Light green moves to terminal No 85.
Make a new earth to terminal No 30 (what red was connected to).
The violet/yellow stays on terminal No 87.

You will need to swap the 2 blower fan wires over within the plug that goes into the fan (violet/yellow and the black) so the fan will blow the correct way.
Also you will need to join the brown and green wire that came of the old system’s thermostat. (Under the glove box beside the heater box)
Go across to your ECU which is behind the passenger side kick panel find a brown wire with a space either side of it an the a grey wire next to one of the spaces disconnect it with enough room to wire another wire on to run it across to the climate plug and connect it to the brown wire there.
Wire Solar Sensor by drilling hole in dash (sits in middle between demister vents. Clips on but you need a hole big enough to fit the plug through… You can see where to drill as it is a push out section). The wire goes from the trip computer switch block side in a direct line up to the sensor.
Install ambient air temp sender (Screw it to the metal section near the drivers side of the radiator for accurate readings, but put foam or something behind it to prevent the warm metal heating it up) and wires which sit just in front of the radiator at the bottom.
Plug in the climate module and test… If it works, replace dash and wiring, and install Climate Control Module.
Re-gas A/C with new O Rings.

• This topic was modified 8 years ago by  Piston 304.
• This topic was modified 8 years ago by  Piston 304.
• This topic was modified 8 years ago by  Piston 304.
• This topic was modified 8 years ago by  Piston 304.
• This topic was modified 8 years ago by  Piston 304.

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

Nice work mate, that will help someone someday for sure  

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