TC lockup switch

I had a lockup switch on a sock trans 97 for years and it was a tow pig. It lived but I knew when I could and couldn't use lockup. It is pointless on a stock truck though. Mine was a gutless wonder locked up and bone stock. Torque multiplication is nice on a stocker.
 
Wire it to also be a TCC disable switch and it will last much longer.
 
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