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- - 3RD brake light issue (https://67-72chevytrucks.com/vboard/showthread.php?t=793713)

elorenzof

09-20-2019 01:18 PM

3RD brake light issue

1 Attachment(s)

Hi all, happy Friday.

I purchased an LED 3rd brake light from Robznob11 and installed it. WORKS GREAT WHEN STOPPING! only if the driver or passenger door is open. ??? wired it into the brake light switch white wire. 1970 c10 2wd. any suggestions?

71gmcC15

09-20-2019 01:23 PM

Re: 3RD brake light issue

Is it grounded though the door swiches? That's my only gess

demian5

09-20-2019 01:24 PM

Re: 3RD brake light issue

If I read this right, for some reason its using the same ground as the courtesy lights. If so, when the doors are closed, there is no ground for the light - that is why. You have to ground the light separate from the courtesy light circuit.

elorenzof

09-20-2019 01:55 PM

Re: 3RD brake light issue

Quote:

Originally Posted by demian5 (Post 8596367)

THANK YOU. I'll pull off the cargo / 3rd light and see where it is grounded and that sounds like you nailed it perfectly.

elorenzof

09-20-2019 01:55 PM

Re: 3RD brake light issue

Quote:

Originally Posted by 71gmcC15 (Post 8596366)

Is it grounded though the door swiches? That's my only gess

thank you for your response i gotta check my grounding just like you guys said.

mgkgmc

09-20-2019 02:41 PM

Re: 3RD brake light issue

You could just drive with the doors open just a thought.:lol:

elorenzof

09-20-2019 03:41 PM

Re: 3RD brake light issue

Quote:

Originally Posted by mgkgmc (Post 8596408)

You could just drive with the doors open just a thought.:lol:

TEChNICALLY id just have to open the door when i stop

BigBird05

09-20-2019 09:13 PM

Re: 3RD brake light issue

Did you replace the brake pedal switch to a 3 wire? You need a dedicated circuit going to the 3rd brake light.

toolboxchev

09-20-2019 09:43 PM

Re: 3RD brake light issue

Quote:

Originally Posted by mgkgmc (Post 8596408)

You could just drive with the doors open just a thought.:lol:

Naw, its made that way from the factory so when you go to stop the bird has to fly also!;)

Andy4639

09-20-2019 09:43 PM

Re: 3RD brake light issue

I just installed mine a few weeks ago and I also had to change the ground wire to the back of the screws holding it in place.

My link on installing it.:chevy:

http://67-72chevytrucks.com/vboard/s...d.php?t=790874

elorenzof

10-21-2019 05:04 PM

Re: 3RD brake light issue

[QUOTE=Andy4639;8596571][B][COLOR="Red"]I just installed mine a few weeks ago and I also had to change the ground wire to the back of the screws holding it in place.

FINALLY got around to changing the ground. I did what Andy4639 suggested and now i don't have to open the door when stopping to make the third brake light work. Thank you for your help fellas as usual.

special-K

10-22-2019 12:12 PM

Re: 3RD brake light issue

[quote=elorenzof;8613605]

Quote:

Originally Posted by Andy4639 (Post 8596571)

[B]

FINALLY got around to changing the ground. I did what Andy4639 suggested and now i don't have to open the door when stopping to make the third brake light work.

I hope it's not too difficult breaking yourself of 'that' habit :lol:

"Watch out Harold! Looks like we have a loony ahead of us getting his nerve up to jump out of his truck. This is the third time he has opened his door but decided to stop"

mgkgmc

10-25-2019 09:16 AM

Re: 3RD brake light issue

[quote=special-K;8614121]

Quote:

Originally Posted by elorenzof (Post 8613605)

Haha too funny!

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