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Tapping brake switch for brake controller on a late 90s Suburban??

D

dka99burb

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Location
Reidsville, NC
I finally got around to messing with the brake controller again today thinking I would only spend a few minutes finishing wiring it. After probing every terminal that I can find, I looked in my GM factory manual's schematics and found that there is an optional brake switch relay in the under hood fuse/relay box that is only on the trucks. Not Suburbans. I probed the 'convience center' terminals that are behind the parking brake and both fuse centers. Nothing!
:mad2:
I also tried to find the brake switch physically so that I may trace a wire, or tap into it, and there is so much CRAP under the dash that I cannot see it. So, Suburban guys, where do you tap in at?? :???:

Thanks in advance.
 
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