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thelonerife

06-03-2016 10:38 PM

Whats this plug for?

2 Attachment(s)

I have an 87 GMC and removed the radio today and afterward this plug caught my eye. It has a purple and pink w/purple line wires to it. I looked at wiring diagrams online and can't find it. Any help is appreciated.

cdub2010

06-04-2016 06:33 PM

Re: Whats this plug for?

goes to brake switch for MD8 trans

thelonerife

06-04-2016 07:23 PM

Re: Whats this plug for?

Oh okay. Thanks

foamypirate

06-04-2016 07:39 PM

Re: Whats this plug for?

Quote:

Originally Posted by thelonerife (Post 7614978)

Oh okay. Thanks

Yep! To expand on the other poster's answer, it's the 12v+ feed to the torque converter lockup for 700R4 transmissions. Brake pedal application breaks the circuit, removing 12v+, and unlocking the converter. If you have a TH400, it will still be in the harness, but unplugged.

thelonerife

06-06-2016 12:44 PM

Re: Whats this plug for?

Thanks for the info. I wish I had a 700r.

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