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Locking Circle-D 4C through diagnostic port?

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Old 02-20-2010, 05:30 AM
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Default Locking Circle-D 4C through diagnostic port?
I know on other cars you can force converter lock-up grounding a couple of pins in the diagnostic port. Possible here? I wanted to try it in high gear if possible.
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Old 02-20-2010, 08:39 AM
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You can tap into the TCC wire at the PCM and have a button to ground to activate it when needed. I believe it's the red plug on the computer pin number 42, tan wire with a black stripe on the 99-02 F-bodies.

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Old 02-21-2010, 09:03 AM
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Originally Posted by TXCAMSS
You can tap into the TCC wire at the PCM and have a button to ground to activate it when needed. I believe it's the red plug on the computer pin number 42, tan wire with a black stripe on the 99-02 F-bodies.

G/L
Is that the only way? Anyone make a lock-up switch plug and play?
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