Draimond
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- Aug 28, 2008
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- VS V6 Executive
This being just one of the million things I'm having to tick off during my V6's turbo haltech conversion, I really feel like my brain is resisting engagement on this particular part. I'd rather be fabricating or polishing alloy than wiring up my AC. So to help with said struggles, I'm going to lay it all down here and try and come up with a solution. I also have no idea what I'm doing yet so any input, ideas and help would be appreciated.
My initial zero thought assumption was I just needed two wires from the ECU to control the AC.
I then checked the relay in the engine bay and it appears that there's 3 wires that run to the factory PCM loom.
The AC switch on the dash has five wires which appear to head towards the BCM or they pass through the firewall with the BCM wiring cluster.
Haltech uses up to 4 inputs/outputs.
Random thought, considering haltech is made to run in a 12 volt car, there is a frustrating amount of 5V
The first glaring problem I see is that the Haltech's AVI on-off switch is looking for 5 volts...
Anyway, so I still need two wires from the ECU into the engine bay headed over to the VS engine bay relay box. Which will be the compressor trigger and the pressure switch...
That's the 3 wires that head up the BCM loom from the engine bay relay box and break out to the PCM loom just before the firewall in the engine bay.
My initial zero thought assumption was I just needed two wires from the ECU to control the AC.
I then checked the relay in the engine bay and it appears that there's 3 wires that run to the factory PCM loom.
The AC switch on the dash has five wires which appear to head towards the BCM or they pass through the firewall with the BCM wiring cluster.
Haltech uses up to 4 inputs/outputs.
- Request - (like your on/off switch) AVI +5V
- Output - DPO to engage the compressor
- Pressure sensor - AVI +5V
- Temp Sensor - AVI +5V
Random thought, considering haltech is made to run in a 12 volt car, there is a frustrating amount of 5V
The first glaring problem I see is that the Haltech's AVI on-off switch is looking for 5 volts...
Anyway, so I still need two wires from the ECU into the engine bay headed over to the VS engine bay relay box. Which will be the compressor trigger and the pressure switch...
That's the 3 wires that head up the BCM loom from the engine bay relay box and break out to the PCM loom just before the firewall in the engine bay.
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