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Discussion Starter · #1 ·
I have a 2007 Silverado with a 29070 3 port module for the Minute Mount 2 lights. None of the plow lights work with the plow connected. Checked all the fuses - good. Took the covers off the plow lights - verified grounds are good to plow lights by connecting test light to battery (+) and backprobing grounds on plow lights - they all lit. Connected test light to good ground and tried backprobing the pins on Port A connector - nothing happens on any pin. Does this indicate the isolation module is bad - anything else I should check?
 

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Discussion Starter · #4 ·
Determined there was no module power in on Port C, pin F. Working it back found a slight bulge in the wire just before the Port C connector - possibly where someone had poked a test light probe through the wire in the past. Cut that out and spliced the wire - bingo all plow lights work.
 
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