This is topic 3rd brake light on 85 mustang in forum Tech Talk at Northern California Ford Owners  .


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Posted by 85staNg302 (Member # 9450) on :
 
im installing my saleen wing n it was 3rd brake light bt 85 didnt come with em so hw i get it to work? lmk thanks [patriot]
 
Posted by KevinK (Member # 9234) on :
 
You can add an 86 and up harness to the hatch or a relay from the 2 brake lights.
 
Posted by 85staNg302 (Member # 9450) on :
 
well the car already has a 88 hatch so all the harness is in it already. i jus dnt know if theirs a conection (on the car) that i can jus plug it in n play. thanks for the advice.
 
Posted by 50Reasons (Member # 6452) on :
 
tap into the rear tail lights using a light tester and someone pushing on the brakes
 
Posted by KevinK (Member # 9234) on :
 
I'm not sure if the harness is plug and play. If it fits, it very well likeyly will work. If not, the worst part is behinde you. 2 wires to the brake lights and to a relay will give you 1 output for the 3rd brake light. I was planning on doing this to my 84 SVO since the 84 spoiler was obsolete. Finally found a used 84 spoiler.
 




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