HELP Brake switch wiring- 4L80E TCC

Injectedcutty

Injectedcutty

Geezer
Supporting Member
Nov 24, 2014
5,227
113
Louisville, KY
Alright guys, I'm sorta stumped on this one. I'm wiring in the brake switch from a 4th gen F body to allow the torque converter to lock/unlock as necessary.
The stock Cutlass pigtail has 3 wires as seen in pic (blue, orange, and white), but the Camaro pigtail only has blue and orange...
20190728_013952.jpg


So where does the white wire get wired in??? According to the schematic, or at least how I understand it is the white wire is a signal to allow the turn signals and hazards flash while the brake is applied. I'm not a DA when it comes to wiring, but scratching my head right now.
20190728_101134.jpg
 
Injectedcutty

Injectedcutty

Geezer
Supporting Member
Nov 24, 2014
5,227
113
Louisville, KY
Blue is cruise cancel
Orange is 12v constant
White is brake signal to the turn switch
Crap, so I need to delete the blue and splice the blue from the pigtail to the white? If that's the case I sorta had a feeling of that, :mad:.
 
fleming442

fleming442

Rocket Powered Basset Hound
Dec 26, 2013
10,197
113
No, no, no! Blue coming off the F-body pigtail will go to your trans module(?). Just splice white to white and orange to orange. Is it purple or pink for the backside section of the F-body pigtail? Either way, that goes to ignition hot (pink), and the blue output to the trans module. The blue on the G switch harness will just be dead. What trans you have again?
 
Injectedcutty

Injectedcutty

Geezer
Supporting Member
Nov 24, 2014
5,227
113
Louisville, KY
No, no, no! Blue coming off the F-body pigtail will go to your trans module(?). Just splice white to white and orange to orange. Is it purple or pink for the backside section of the F-body pigtail? Either way, that goes to ignition hot (pink), and the blue output to the trans module. The blue on the G switch harness will just be dead. What trans you have again?
4L80E so the wiring should be the same as your 60E. This pic I've saved from google. I'll take a couple pics when I get back to the house.
brake_switch_2.jpg
 
Injectedcutty

Injectedcutty

Geezer
Supporting Member
Nov 24, 2014
5,227
113
Louisville, KY
Alright, here is the two prong pigtail from the F body switch tied into the existing wiring....
20190728_162015.jpg


Here is the rear 4 prong pigtail...
20190728_161854.jpg


My switch is identical to pic I posted, so two wires are tied off, the pink will be switched +12V, and the purple will tie into the purple wire from standalone harness for TCC. This is what is messing with my noodle.
 
Injectedcutty

Injectedcutty

Geezer
Supporting Member
Nov 24, 2014
5,227
113
Louisville, KY
Don't need to hook the blue to the factory blue unless you're picking it up somewhere else.
#customwiring
Alright. Well later I'll cut that bish, and hook the f body blue from pigtail to factory white. #blahwiring lol
 
Injectedcutty

Injectedcutty

Geezer
Supporting Member
Nov 24, 2014
5,227
113
Louisville, KY
4L80E...controlled by the ECM. As mentioned there is a purple TCC wire on the main harness to attach to brake switch.
 

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