556sw, 07 mustang, python 990

Yeah, if you get a bypass that is designed for that. I use the key overide sl2 by Fortin. Never had a problem with them, and definately a lot more reliable then a ring around the cylinder.

Well the installer at work just told me I should have used a 556u...the bypass you put the spare key in. That the 556sw...which I have won't work. I know dei told me I could use this bypass. Any reason it wouldn't be working?

Should I hook up the yellow keysense wire. Would that be the problem maybe. It says not to use it on the 556sw instructions, but maybe I should try it. I did notice the r/s would only r/s when the key was like 1/4 the way in the ignition. So maybe it needs the keysense wire hooked up to bypass. Adding an alarm, r/s to this new Mustang of mine is such a p.i.t.a. I shoulda got a honda lol

you should be ok with the 556sw. try repositioning the ring. try to get it around the transponder ring like in the above pic.

I just got it working. I accidentally tagged the keysense wire instead of 12v at the ignition harness. They were both GREEN/ purple wires going to the same place. As soon as I switched the 12v from the sat relay to the right wire, it remote started right up. I feel dumb for going thru all this trouble with it not working, and it was something so easy. Guess I should have retested my wires more carefully. Thanks for the help guys.

I installed a python 990 in a 07 Mustang. The domelight doesn't work. I hooked it up like this. 86 +12v,85 -BLACK/ white Dome Supervision Alarm Output,87-GREEN/ YELLOW Car, 30 Ground. How can I get this to work?How do I adjust the Shock sensor to make it more sensitive? Because I can shake the crap out of my car and it doesn't do anything.