Hazard Light / Brake Light Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

PHOENIX · 04-09-2003, 03:57 PM

OK I do not know if this is right or wrong.

If my hazard lights are on (flashing) and I hit the brake, they stop flashing (all lights, not just the tail/brake lights, even the dash signal indicators). Is this right or wrong?
If it is wrong, which I think it is, what is the problem and how do I fix it. Its not a big deal, I havent used my flashers in a long time. But it just makes me wonder.
I do have an alarm system on the truck (Viper) it is connected to the lighting system so that all lights (except headlights and courtsey lights) flash when the alarm is activated, deactivated, or set off. Does this have something to do with it?

Thanks in advance for the help.

87 STEPPER · 04-09-2003, 04:08 PM

Eddie,

This is a normal condition on our truck's and most other GM product's of old.

I think most newer car's & trucks don't do this any more.

Im not shure why this is but if i had to guess i would say when you depress the brake you provide a constant ground and the flasher unit go's steady but that's just a guess.

Mike76251 · 04-09-2003, 04:40 PM

I am suprised newer vehicles don't do this too.
What if you were towing the vehicle (only a Furd of course)......
You wouldn't have brake lights if the flashers were on.
I think it is a good idea to have it like we do.

apstguy · 04-09-2003, 08:21 PM

It is so your brake light will turn on. Otherwise it just flashes. Nothing to do with the alarm!

Ol' Grey · 04-09-2003, 09:01 PM

Quote:

Originally posted by Mike76251
I am suprised newer vehicles don't do this too.
What if you were towing the vehicle (only a Furd of course)......
You wouldn't have brake lights if the flashers were on.
I think it is a good idea to have it like we do.

The reason why most newer cars don't do this is because there are separate lights for the flashers e.g. turn signals. Our trucks use the same lights for signals/flashers/brakes. The flasher relay will flash the turn signals while the brake lights operate independently by the brake pedal switch.

PHOENIX · 04-10-2003, 02:49 PM

Thanks guys for the help. Im glad to hear its normal. Just seemed a little odd to me.

04-09-2003, 03:57 PM	#1
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	Hazard Light / Brake Light Question OK I do not know if this is right or wrong. If my hazard lights are on (flashing) and I hit the brake, they stop flashing (all lights, not just the tail/brake lights, even the dash signal indicators). Is this right or wrong? If it is wrong, which I think it is, what is the problem and how do I fix it. Its not a big deal, I havent used my flashers in a long time. But it just makes me wonder. I do have an alarm system on the truck (Viper) it is connected to the lighting system so that all lights (except headlights and courtsey lights) flash when the alarm is activated, deactivated, or set off. Does this have something to do with it? Thanks in advance for the help. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

04-09-2003, 04:08 PM	#2
87 STEPPER STILL PLAYS WITH TRUX Join Date: Nov 2002 Location: Melbourne, Fla. Posts: 2,764	Eddie, This is a normal condition on our truck's and most other GM product's of old. I think most newer car's & trucks don't do this any more. Im not shure why this is but if i had to guess i would say when you depress the brake you provide a constant ground and the flasher unit go's steady but that's just a guess. __________________ ~~Bruce~~ MY 87 STEPPER MY 99 2D/WD TAHOE

04-09-2003, 08:21 PM	#4
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,087	It is so your brake light will turn on. Otherwise it just flashes. Nothing to do with the alarm! __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

04-10-2003, 02:49 PM	#6
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	Thanks guys for the help. Im glad to hear its normal. Just seemed a little odd to me. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

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04-09-2003, 04:40 PM	#3
Mike76251 Senior Member Join Date: Mar 2003 Posts: 2,499	I am suprised newer vehicles don't do this too. What if you were towing the vehicle (only a Furd of course)...... You wouldn't have brake lights if the flashers were on. I think it is a good idea to have it like we do.



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