1998 f150 and ultra start 2280

So I ordered the 451M and got it in the mail yesterday. It seems very straight forward. Here is what I have: 451M's Violet/Blk-Stripe--> 12v Constant 451M's WHITE/ Blk-Stripe--> splice into switch-side of cut lock wire 451M's GREEN/ Blk-Stripe--> splice into power side of cut lock wire 451M's Brn/Blk-Stripe--> splice into switch-side of cut unlock wire 451M's Blue/Blk-Stripe--> splice into power side of cut unlock wire RED / GREEN/ Blue 3-pin plug not used. Is this looking correct, or am I off? v/r Bryan B.

Everything looks good for a Type C system with a few notes... 451M Violet and Violet/Black should come pre-joined and go through a 15 Amp fuse to +12V constant "451M's GREEN/ Blk-Stripe--> splice into power side of cut lock wire".   It's actually the "Motor" side. The 451M plug with the Red, Green and Blue wires should be cut off.    The 451M Green wire goes connected to the U2280's Green Lock output wire. The 451M Blue wire goes to the U2280 Blue Unlock output wire. The 451M Red wire can be connected to the Violet or Violet/Black wires before the fuse ( between the fuse and the 451M ).Soldering is fun!

"451M's GREEN/ Blk-Stripe--> splice into power side of cut lock wire".   It's actually the "Motor" side. I was thinking of it as the non-switch side. Hopefully connecting to the correct place! Also, interesting issue. I've temporarily connected the siren up to ground and the brown horn wire in my truck. With my siren's red-wire to my horn and black-wire to ground, my horn blasts steadily, as does the siren. When I reverse the connections, I get no steady horn/siren. When pressing my horn, it works just fine. Any idea's? I did a system reset on the 2280 and it still does this. I removed power at the battery, reapplied and it still honks. I did connect my tach sense to my number 1 injector line as well. v/r Bryan B.

Disregard! After some coffee/smoke and fresh eye's, I spotted my problem. Afterwards, I did the manual reset, re-programmed my remotes and tach-learned. Now my remote start is functional and my keyless entry is working as intended. AND my horn/siren don't run constantly! Now it's time to tidy-up my wiring, cable covers and zip ties, etc., and it'll be complete. I'll tackle that part tomorrow. Unless there are any objections, I'd like to make a post that show's all the connections I did, tips for routing and reaching particular wires, etc.. I do credit you for it now working! Your help has been outstanding! Thank you very much for your patience and great information! v/r Bryan B.

Excellent news!    Good work. Just in time for the cooler weather. Yes, please include any tips & tricks and especially any photos that will help others. The F150 is a popular truck and there are plenty of that vintage still on the road. Not sure, but the Forum might have some rules & restrictions concerning uploading pictures due to the number of posts a member has. Might want to check the rules first. Also, try to keep the pictures at standard VGA resolution with a simple (xxx.jpg) name.Soldering is fun!