viper 5906v+idatalink ads alca 8thg civic

You've lost me here I never use W2W not in this application and the only wire I needed to use on H2 was the BLACK/ white.

Why would you never use W2W in this application?

Saving about an hour per install perhaps? Especially when I have to drive 100+ miles to get there. I flash the CAN bus module the day before, label maker mark it with the software and take a spare, XKloader 2 and laptop with me. My colleague also carries similar, he starts out in Bristol (100 miles west of London) does 2 + BMWs per day.

The other answer is that I've rarely had problems with D2D, especially when you realise that NONE of them completely give you what it says on the label. With Hondas I've always had to either ground or handbrake the BLACK/ white, it doesn't recognise the parking brake on Euro GM, also doesn't do some hood switches. I also NEVER use that ugly, stupid over-ride switch, I solder over the contacts, again with D2D I rarely need more than one wire from H2 so I solder to the board. Got loads of spare looms, EVO, DB-ALL and 5X04. Also like Kreg, for low current ignition and start requirements, I rewire the H3 plug with smaller gauge wiring, that loom is a) Often not long enough. b) Extremely poor quality.

Understood. If I go D2D, what other wires do I need to connect besides the H2 BLACK/ White Neutral Safety / Parking Brake Input?

Only that and wait and see, it may work on the US version. 05-12 US was different to the Euro version slightly in body with a different cookpit although the electrics were the same.

How about the H3 10-pin Heavy gauge wires of the 5906v?

Follow the instructions, go to ignition, test to see what's there and wire and program accordingly.

You are very helpful. Thank you.

Mr. Kreg357, Can you please show proper wiring to connect Viper 5906v to the ADS-ALCA and to the car using W2W method. Viper 5906v Harness 2 AUX/Shutdown/Trigger, 24-pin H2/1 (-) Ignition 2 / Flex Output .2A Pink/White H2/2 (-) 2nd Status / Rear Defogger Output .2A Blue/White H2/3 (-) Trunk Release Output .2A     RED / White      H2/4 (-) Dome Light Output .2A BLACK / YELLOW H2/5 (-) Status Output .2A Dark Blue H2/6 (-) Aux 3 Output .2A WHITE/ Black H2/7 (-) Aux 1 Output .2A WHITE/ Violet H2/8 (-) Aux 4 Output .2A ORANGE / Black H2/9 (-) Hood Pin Input (Normally On or Normally Off) Gray H2/10 (-) Trunk Pin / Instant Trigger Input (Normally On or Normally Off) Blue      H2/11 Activation Input WHITE/ Blue H2/12 Tachometer Input     Violet/White* H2/13 (-) Neutral Safety / Parking Brake Input     BLACK/ White** H2/14 (-) Factory Alarm Disarm Output .2A GREEN/ Black H2/15 (-) Door Input Green* H2/16 (-) Horn Honk Output .2A BROWN / Black H2/17 (-) Ignition 1 Output .2A Pink      H2/18 (+) Door Input Violet* H2/19 (-) Aux 2 Output.2A Violet/Black H2/20 (+) Brake Shutdown Input Brown H2/21 (-) Starter Output .2A Violet / YELLOW H2/22 (-) Diesel Wait to Start Input Gray/Black      H2/23 (-) Accessory Output .2A Orange H2/24 (-) Factory Alarm Arm Output .2A     GREEN / WHITE Thanks