Need info on installing 791xv on Expediti

Might help if you gave us the year.

you want the locks to open when you arm it? if you want window automation you'll need a control module such as the DEI 530TLife moves pretty fast; if you don't stop and look around once in a while; you could miss it.

I want the locks to lock when armed and unlock/disarm. And which wires do I hook the 555F to?

Just finished my friend's '97 Expedition a short while ago. You don't need any extra relays. As described above, you just need window modules if you want to do windows. --The BLACK/ green second accessory wire is not required for remote start; it just powers the radio and wipers, and you don't want those on during remote start anyway. --The doorlock wires and door trigger are high up at the BCM above your left foot. Work the power doorlocks back and forth, and you'll hear/feel the BCM clidking---that should help you find it. --I find it challenging to get the placement of the 555F to work right. I usually just get a 555U, a blank key, and program the key. By the way, don't forget you need two existing good keys to program that 555F. --Off to the right of your ignition wires, near the bottom of the dash, you'll see an unused gray plug. That's for the trailer brake controller----you'll find parking lights and brake there. --Above the gas pedal, is a large rubber grommet, suitable for running wires under the hood. --The WHITE/ pink tach wire is in the large harness, above the driver's left foot, coming in from the firewall. The harness is tight, and there are several WHITE/ pink wires in there. You'll have to test each of them until you get the right one. --Under the steering column, besides the holes that have screws, you'll see one empty hole. Turn the key to Run, insert a long, thin, pointy tool, and the entire keyswitch slides right out.

Thanks Chris thats sounds like really good info. I'll give a shot when I start. What wires do I need the 555f to connect to? and what do I need to pop out the keyswitch for? I'm sorry if these sound like stupid questions I just want to have everything in order when I start. Thanks again for your patience. I printed your first post and put it with the rest of my info.