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I'm not a mechanic/technician but I believe that is a defective daytime running lamp (DRL) module
lay under your suv with your feet out the front and it should be right there it looks like a gray clip that clips in a box.
Check the daytime running light module
A daytime running light module (DRL) is a unit that controls a 2-4 headlight system on most standard vehicles. On the 1999 Ford Ranger, the module can be found in front of the left wheel well on the front side of the rad support.
Loose connection SOMEWHERE. It could be a defective DRL (daytime Running Light) module
I have never seen one. If you want them off you have to press on the emergency brake a little.
Check bulbs--Low been element could be burned out Check fuse for daytime running light module, make sure your park brake is not part way on. Or module may be bad. High beam's are not controled by module, that is the reason thy still weork.
On my 1999 Buick Regal the DRL module is located on the outside foot well behind the parking brake pedal under the carpet. My DRL has gone bad and is making the car quit.
yes
On a 1999 Explorer there is a 7.5 amp fuse in location # 10 of the fuse panel for the overhead console.
Fuse #9
I take it you have daytime running lights , if so by engaging the emergency / parking brake the daytime running lights should go off