Stereo pin out Shaker/F150

splogan

Founding Member
Mar 31, 2002
127
3
19
The wiring diagram shows pin 18 as

audio/climate control switch

WTF is that. I recently installed a shaker 500 radio and they are pinned out nearly identical except pin 18 is listed as above for the truck and for the Shaker pins 18 and 19 are the sub out +/-. Any help guys. I am trying to figure out how to install a sub with this setup.
 
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