Car's not here, but the mods have begun

[KarlFranz]

divetheworld said:

The steering wheel controls are multiplexed before the clock spring. Being that the common factor is that the inputs are simply two state devices, you at worst should be able to cut the tracks on the vanq board and hard wire to an OEM board after removing the surface mount microswitches.
The hard part will be adding a function that wasn't there before like using the Sport button. Back in the 90's I built a new steering wheel that included full controls for an Alpine unit. The job was easy once I realised that there was no way to use the clock spring. I used RF control. you have the clues in front of you.
How often will you replace the battery on your remote for the exhaust valves? Years? Wire the remote switch to the "S" button and hide the remote in the steering wheel.
Just a thought.

The clock spring on the Vantage has a couple of unassigned pins, I was thinking of using those if I decided to repurpose the Sport button to the radar mute function. I do like your line of thinking regarding the wireless remote though. The only problem is that it actually uses two dedicated buttons to open and close the relay respectively so I would need a latching circuit on the relay side to toggle the state using just one button.

The left switchpack also has a spare button (for the adjustable suspension on the Vanquish). However, I would rather not dedicate both spare buttons to control the exhaust only. It's a lot easier to program both exhaust remote buttons to the spare Home Link buttons instead.

Your idea of using both circuit boards (one for the switches and one for the actual circuit) is actually pretty clever. I don't know if you have looked at the guts of the Vantage cruise control or audio switchpacks, but they are unbelievably old-school. They use leaf-spring switches, full-size LEDs and resistors and the plastic housing is sort of a unibody chassis that holds those components in place. The Vanquish switchpacks, by comparison, use surface-mount components, micro-switches and is well laid out on a 2-layer board.

[KarlFranz]

Biggriff said:

I understood all of that .... Right up to the point where you started typing.

LOL