remote start, 2008 mountaineer

i am installing a remote start in 2008 mercury mountaineer premier v8 i have 556uw bypass but only 1 key any bypass that i can use with 1 keywiener20

None. You either need to have a new key cut and programmed, (recommended) OR, wire the 556uw to a constant ground, ground the status wire, and put the constant 12v to ignition, have a new plain non coded steel key cut at home depot and put the coded key in the 556. (NOT recommended) This will make the vehicle think that your using the original key any time you start it with the plain non coded steel key and also serve as they bypass for the remote start. AGAIN, NOT recommended, but will save 60-100 bucks for the second key.Gary Sather

interesting where would the remote start status output wire gowiener20

Well, if you do the NON recommended way. It would not need to be used.Gary Sather

thanks for the knowledge i'm springing for new keywiener20

i have wire connection info for remote start 2008 mercury mountaineer but does not show tach wire infowiener20

Bulldog wiring says Tach @ any fuEl injector not purple An injector has 2 wires, usually one wire on every injector is the same color. So in this car look for the wire thats not purple. Very the wire with DMM, should show voltage between 1-6v.

thank you goes in tomorrow i plan on using 2 wire crimp connectors for project hopefully should dowiener20

First set the DMM to 20volts AC. Second any of the uncommon colour injector wires will do. Third, don't crimp, solder your connections.

thank youwiener20