05f150lariat5.4L4x4

Unfortunately, the purple wiring fix in this thread does not work on a 4 door '05 Lariat. There are two purple wires under the front driver side door and one purple wire under the rear driver side door, but the two wires do not splice together as previously mentioned. One of them runs from the front of the cabin all the way to the rear of the cabin. The other purple wire runs from the front of the cabin to the middle of the truck, then turns and heads down the center canal going across the truck (between front driver and passenger seatbelts).

If anyone has any other recommendations, I would greatly appreciate it!

Thanks

timnop

Same boat as you 2005 Supercrew Lariot, however I did find the purple wire splice but mine was fine. It was shrinked and sealed very well and I cut it open to be sure. My radio stays on when key removed and door opened. If I operate a window switch, the window will start to operate just for a second and the radio goes off, but after another couple of seconds the radio comes back on. I can repeat this over and over with same results. Did you find a solution?

Bruceman53

I have a 2006 F150 Lariat and I have the same issue.


The problem with mine is the jam switch, this switch is connected to the latch assembly inside the door.


You can try spraying lubricant (WD 40) into the latch. I sprayed mine and it worked a couple of times and then quit again.

SiskCFRN

Owning these trucks is a headache. The end.

07Mark_LT

I'm having the same issue with my '07 Mark LT. Checked the purple wire splice and it was solid with no signs of corrosion. I sprayed WD-40 into the latch and opened and slammed the door several times. Driver door, front passenger, and rear passenger door do not turn on any of the dome lights. Only door that lights the dome light and rear bed light is the driver side rear passenger. Any suggestions?

SiskCFRN

I tried all that too, and all I wound up with was a greasy mess. I replaced the door jamb relay, and it solved the problem.Available on Amazonnfor around $30. There are YouTube videos available to tell you how to access it & replace it. https://a.co/d/3UpgAz8

07Mark_LT

Issue ended up being the door latch/jam switch. I replaced the driver side switch, and that door worked shutting off the radio when the door opened and tripping the interior and bed lights. I ordered the passenger side switch, replaced that, and that solved the problem. And you're right, it was a greasy mess to get the switches out after flooding them with WD-40!