• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

Brake light help

  • Thread starter Thread starter evil281
  • Start date Start date Oct 8, 2008

evil281

New Member
Jan 6, 2008
276
0
0
Arizona
Oct 8, 2008
#1
  • Oct 8, 2008
  • #1
so i went to an 03 cobra spoiler on my 99 mustang gt and the connectors on the 3rd brake light are different, the gt ones are 4 wires and the cobra one is just 2, is there a wire harness for this or can i hardwire it to work by splicing the wires? anyone done this yet?
 

02nightmaregt

To hell with your Mustang, I want to see your HOG!
Jul 1, 2007
513
4
19
Southern Indiana
Oct 8, 2008
#2
  • Oct 8, 2008
  • #2
I think there's a pigtail kit out there somewhere. I kinda remember someone talking about this a while ago, but not 100%. Epik might know, he did the swap too.
 

evil281

New Member
Jan 6, 2008
276
0
0
Arizona
Oct 8, 2008
#3
  • Oct 8, 2008
  • #3
i actually already talked with epik, he said he got the whole trunklid which had the cobra wiring on it already so no dice there, thanks tho
 
W

Will Smith

New Member
Aug 8, 2004
191
0
0
Cape Coral, FL
Oct 9, 2008
#4
  • Oct 9, 2008
  • #4
gimme a few... looking up on the wiring diagrams
 
W

Will Smith

New Member
Aug 8, 2004
191
0
0
Cape Coral, FL
Oct 9, 2008
#5
  • Oct 9, 2008
  • #5
ok here is the deal on the wiring... they both use the same colored wires just different connectors... according to the wiring diagrams on both vehicles a 99gt and 03 cobra.

Dark Green - Feed wire
Black - Ground

Just splice these two together... should work....

as far as the other two wires in that connector.. its possible they are for the tag lights... so u might have to leave the stock harness in there and either modify it/and or remove the stock 3rd light but the harness side of it...
 

evil281

New Member
Jan 6, 2008
276
0
0
Arizona
Oct 9, 2008
#6
  • Oct 9, 2008
  • #6
Will Smith said:
ok here is the deal on the wiring... they both use the same colored wires just different connectors... according to the wiring diagrams on both vehicles a 99gt and 03 cobra.

Dark Green - Feed wire
Black - Ground

Just splice these two together... should work....

as far as the other two wires in that connector.. its possible they are for the tag lights... so u might have to leave the stock harness in there and either modify it/and or remove the stock 3rd light but the harness side of it...
Click to expand...



well to install the spoiler you have to take out the gt brake light which has the lights for the tags, so i guess i need to pull the lights and harness of the brake light and modify it to sit in the proper place to light up the tags? hhhmmm time to get creative i suppose thanks for the help!
 

evil281

New Member
Jan 6, 2008
276
0
0
Arizona
Oct 9, 2008
#7
  • Oct 9, 2008
  • #7
ok so heres what i did in case anyone ever does this swap too,

1 cut off wire harness from 3rd GT brake light leaving maybe 3 inches of wire
2 remove the outer two wires from harness by simply pulling them out, leaving only the black and green wire still in the connectors end
3 cut off connector on cobra spoiler that has the green and black wires
4 use electrical connectors and connect the green with the green and the black with the black with the gt plug u just cut off the gt 3rd brake light and attach to the cobra wires
5 plug the new cobra spoiler into the gt harness......done

ps the two other wires are to the trunk light that is removed when the gt 3rd brake light is taken out, have no function but to turn on light when u pop trunk
 
You must log in or register to reply here.

Similar threads

1
Electrical Headlight harness trouble
  • 1985fox
  • Apr 14, 2026
  • Fox 5.0 Mustang Tech
Replies
7
Views
188
Fox 5.0 Mustang Tech Apr 17, 2026
AeroCoupe
Resolved Holley terminator integration into CCRM
  • BrandonMP
  • Feb 25, 2026
  • SN95 4.6L Mustang Tech
Replies
1
Views
203
SN95 4.6L Mustang Tech Feb 27, 2026
BrandonMP
M
Need help!
  • Masonevans726
  • Dec 17, 2025
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
1
Views
209
1996 - 2004 SN95 Mustang -General/Talk- Dec 17, 2025
Masonevans726
M
A
Electrical electric mirror switch issue...
  • alchemist1
  • Apr 18, 2026
  • Fox 5.0 Mustang Tech
Replies
1
Views
92
Fox 5.0 Mustang Tech Apr 19, 2026
2000xp8
Electrical 91 hatch wiring help needed
  • FastDriver
  • Apr 7, 2026
  • Fox 5.0 Mustang Tech
Replies
2
Views
129
Fox 5.0 Mustang Tech Apr 8, 2026
FastDriver
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?