Hazardous hazard lights
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New User
Joined: Dec 2012
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From: Calgary, Ab
Hazardous hazard lights
I noticed that when I step on the brake my hazard light stop flashing. I can understand that the lights wouldn't flash at the back since it's the same filament, but why are the front one not working?
I drive a 76 ford f250. Other than that, the rest of the lights are perfectly fine.
Thanks
I drive a 76 ford f250. Other than that, the rest of the lights are perfectly fine.
Thanks
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Joined: Jan 2001
Posts: 56,977
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From: Virginia
The lights stop flashing in the rear and the front when you step on the brake, because you are putting 12v on the same wire the hazard flasher is using to drive all the lights. You notice they stay on correct? That's the 12v from the brake switch.
The flasher for the hazards is much the same as the turnsignal flasher. 12v in, blinking 12v out on one wire. The hazard switch takes all the wires going to the bulbs and disconnects them from their original sources, and puts them all on the flasher. But they usually cheat on the rear lights, and use the one brake switch input to the turnsignal switch to drive the rear lights. That's where the problem comes in when you hit the brake pedal. They all do it.
The flasher for the hazards is much the same as the turnsignal flasher. 12v in, blinking 12v out on one wire. The hazard switch takes all the wires going to the bulbs and disconnects them from their original sources, and puts them all on the flasher. But they usually cheat on the rear lights, and use the one brake switch input to the turnsignal switch to drive the rear lights. That's where the problem comes in when you hit the brake pedal. They all do it.
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New User
Joined: Dec 2012
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From: Calgary, Ab
The flasher lights in the dash stay on when I apply the brake, but everything goes back to normal when I release the pedal. There was a spare turning signal harness when I bought the truck, perhaps it's the problem! I didn't want to change it just for the sake of changing it.
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Joined: Feb 2011
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yeah, just keep the truck moving at speed and you'll be fine. its a design thing. we aren't supposed to need the 4-ways unless we're already stopped and in park anyway - or that must have been the theory of the engineers
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Joined: Jan 2001
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From: Virginia
If you have a legtimate concern and your truck has a special use that you need some some sort of hazard warning system, you can buy a aftermarket strobe system, usually on ebay, pretty reasonable. Whelen is one of the cadillac's of those systems, but they are not cheap.
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