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For those that would like to delete the Automatic Level Control full time connection to the battery, read: System Is Hot With Key OFF! - it is relatively easy to accomplish.
I dove into my FSM to look at my modified wiring diagram for the specifics.
This mod is performed at the Level Control Sensor mounted over the differential; this is relatively easy to get to and remove - versus removing the front left wheel and other stuff for access to the compressor assembly wiring.
Gain access to the harness from the Level [Ride Height] Sensor over the differential. This mod can be done 'on car', but it is much easier to do when it is sitting on a bench in front of you.
Six wires in this ride height sensor harness and plug:
Pin A - Black: Ground
Pin B - Yellow: Compressor Control
Pin C - Orange/Black: Key OFF HOT (Fuse #27)
Pin D - Red/Black: Key ON HOT (Fuse #12)
Pin E - White: Vent Control
Pin F - Blue: Not Used in our application
The objective is to splice the sensor Orange/Black wire into the sensor Red/Black wire. You are disconnecting the KEY OFF HOT wire - where the sensor sees power all the time - and attaching it to the Key ON HOT wire that is only powered when the Key is in the ON position.
Take the other end of the Orange/Black wire that you cut [leading to the harness plug] and "ISOLATE" it. Basically use some 3M black electrical tape and cover it up and tape it back out of the way; remember, this sucker is HOT all the time. Or get fancier based on your time/talents.
Reinstall the sensor and plug the harnesses together. Your ALC system in total will now only operate when the key is ON.
Pretty simple fix/mod and eliminates a potential source for a dead battery due to leaking ALC air lines and/or connections.
I dove into my FSM to look at my modified wiring diagram for the specifics.
This mod is performed at the Level Control Sensor mounted over the differential; this is relatively easy to get to and remove - versus removing the front left wheel and other stuff for access to the compressor assembly wiring.
Gain access to the harness from the Level [Ride Height] Sensor over the differential. This mod can be done 'on car', but it is much easier to do when it is sitting on a bench in front of you.
Six wires in this ride height sensor harness and plug:
Pin A - Black: Ground
Pin B - Yellow: Compressor Control
Pin C - Orange/Black: Key OFF HOT (Fuse #27)
Pin D - Red/Black: Key ON HOT (Fuse #12)
Pin E - White: Vent Control
Pin F - Blue: Not Used in our application
The objective is to splice the sensor Orange/Black wire into the sensor Red/Black wire. You are disconnecting the KEY OFF HOT wire - where the sensor sees power all the time - and attaching it to the Key ON HOT wire that is only powered when the Key is in the ON position.
Take the other end of the Orange/Black wire that you cut [leading to the harness plug] and "ISOLATE" it. Basically use some 3M black electrical tape and cover it up and tape it back out of the way; remember, this sucker is HOT all the time. Or get fancier based on your time/talents.
Reinstall the sensor and plug the harnesses together. Your ALC system in total will now only operate when the key is ON.
Pretty simple fix/mod and eliminates a potential source for a dead battery due to leaking ALC air lines and/or connections.