I am: Bob .
Join Date: Nov 2004
Vehicle: 2003 Ford Ranger
Drive Type: 4x4
Total Props: 19
The exterior running lights are on fuse 10. The output wire from #10 is tan/white and goes to the headlight switch. The color code from the headlight switch to the running lights is solid brown.
If there is power to the hot side of the fuse and the fuse is OK, then there is no short to ground after the fuse. That means that you are looking for a break (open) in the circuit somewhere.
Although it could be a wire or connector problem, the primary suspect on Gen 2 Rangers is the headlight switch. Check for voltage on both sides of the switch (tan/white and brown). The tan/white should be hot at all times. The brown should be hot in both the PARKING LIGHT and HEADLIGHT positions.
[Note: It is possible to have the headlamps working and still have a bad switch for the running lights. There are 4 separate sets of switch contacts in the Gen 2 headlight switch.]
There are three separate ground points for the exterior lights, one for the tails and one each for the corners. It's hard to believe that they would all fail at the same time. All of the grounds are in the engine bay on the inner fender aprons and the radiator support.
2003 FX4 Level II, Supercharged 5.0L V8, Headers,Duals 4R70W auto, BW4406 manual T/C
Aussie Locker, Torsen L/S, 4.10's, Bilstein 7100 rezzies, Cadillac/Mustang rear discs, Duff traction bars
Keypad Entry, Lock LEDs, ABS switch, sway bar discos, Heated seats, Explorer EATC, Trip Computer and consoles
5.0L V8 swap: Click
2003 XLT 2.3L M5OD-R1 reg cab beater, 2011 Taurus SEL, 2016 C-MAX Energi Plug-in Hybrid
Last edited by rwenzing; 12-12-2007 at 11:56 AM.