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Wanna B Jack o all Trades
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C-type is reversible polarity
Pull out the drivers side dash speaker if its a 89-94, or move the door boot back into the door some on all 89-99 trucks. I think in that truck the wires are white and lt blue. Depending on what setup your using, Run the wires like this:
green/black to the truck side of the lock wire (white I think)
white/black to the door side of the lock wire
blue/black to the truck side of unlock
brown/black to the door side of unlock
purple and plurple/black to a constant +
 
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