This will not work on the 99-01 because that rectangle connector isn't there. On the 99-01 the connector is behind the speaker and it's round. Also the 99-01 F250/350 only came with mirror control, no heat or turn signal wiring. This can work "if" you buy a connector adapter for the mirror control. To add heat you have to build a wiring harness to go from both mirrors to the ignition switch, add a 7.5 amp fuse and a heat power switch. To add turn/park switch back lights you have to build a wiring harness to go through the dash and connect to the Steering Cloumn wiring for Turn Signal Lights and to the Headlamp for Parking Lights. Other than that great video. Thumbs up.
If you have a 99-01 F250/350, for Turn signal lights tap into the turn wires on the Multifunction Switch under the clamshell on top of the steering column. You'll need to remove the ignition key tumbler to get the clamshell off. It's the WHT/LTBLU & LTGRN/WHT wires on the funny looking gray connector. For Park/Running lights you have to pull the Headlamp Switch and Tap into the brown wire on the Grey connector. For all three wires use red wire T-Taps. Hope that helps. Best Wishes n Blessings. Keith Noneya
