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  1. R

    6.2 700r4 lockup 12v source

    Yes, those diagrams could use some improvement, I look at peterbilt wiring diagrams all day long as part of my job and they aren't half as bad at jumping around as this dang service manual. Mine is 2wd, and I do have 12v at the brake switch and the brake switch interrupts it as it should. So...
  2. R

    6.2 700r4 lockup 12v source

    I forgot to include its a 1991 1500 suburban.
  3. R

    6.2 700r4 lockup 12v source

    In the process of troubleshooting why my tcc won't lockup. I've figured out the 12v side is not making it to the connector at the transmission. I have a factory service manual but I still can't figure it out. It says it goes to the rwal diode array aff of the firewall, but it's not on the rwal...

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