Hi Ford Truck Enthusiasts:

I have a F-150 1991 XLT Lariat, stops lights, turn signals work fine, but if i turn on the hazard lights and hit the brakes stop these.

Someone has an idea!!!

Thanks!!!

 

Idea of what? It has not been that long ago that was the normal operation. All of vehicles built before about 2000, the hazard lights stop flashing when the brake pedal is pushed.

 

Really??? I have nearly ten years with the truck and did not know, thought that was a failure, thank you very much!!!!

 

This is indeed normal. Any vehicle with integrated turn signals and brake lights will do this. The only vehicles that *don't* do this is those with separate (ie, amber) turn signals.

 

But, for example, had a chrysler neon, that is a similar case, has a single bulb for stop, turn signal and hazard, when hazard on, you hit the brakes and kept flashing hazard, i guess it should also work my ford.

 

My '92 doesn't stop flashing when I hit the brakes, but my '80 does. I figured it changed after '91.

 

Yes, this is indeed normal. The early 90's fords use a 2 bulb rear lighting system this means there is one filament used for tail lights and one filament used for BOTH the turn signals and the brake lights. newer Trucks with this system may disable the brake lights inside the hazard swtich when it is closed.

 

Typically anything with a 3rd brake light will allow the brake light to function normally and allow the flashers to keep working

 

Ok, only will do one last review of electrical diagrams, if definitely not be what I will do is put a 5 pin relay to interrupt the feeding of the brake lights.

road situations or emergency stop in traffic is needed but the hazard which the brake light.

Thanks to all!!!