seedcleaner
Newbie
On the K3500 with BW transfer, there is a red wire that powers the synchronizer in the transfer case. This power wire comes from a 4x4 relay under the hood, that only one ton Borg Warner trucks have (my understanding). Is this supposed to be powered while in 2wd or 4wd. A GM service book states it is de-energized when placed in 4wd....wanted to verify that.