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Check brake system n dead batteries

7.9K views 5 replies 5 participants last post by  RandomForumGuy  
#1 ·
I went to start and check the truck out this morning while my work truck warms up. I turned the key to on and the displayed reads check brake system. Don?t know what that means.

Also it sat over night and now it won?t start. Thinking I have bad batteries. But this just suddenly happened. Temp outside is 34 degrees.
 
#4 ·
YUP ^^^^ Dead batteries will do all kinds of crazy