Wiring battery combiner into 7 pin harness
Hey everyone. I've got my truck camper permanently on my 1998 GMC K3500 and unfortunately cannot easily access the 7pin harness to unplug when it is off the truck. I quickly realized that with it full...
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Gdetrailer wrote:I agree with this
Instead, opt for a $8 12V relay which the coil is connected to the ignition keyed source which is powered only when engine is running.
Common 12V relays are the "Bosch" cube style which are typically 30/40A which would be enough to cover the charge fuse.
For overkill they do make a 70A Bosch style relay..
I used a few similar to These Cheap Chinese 80A Relays because they came with a Bosch compatible socket, thinking I would replace them with the Bosch 70A when they fail. 4 years later one is switching 120VAC ~12.5A and the other switches ~8.3A a few times a day Without issue using a 12VDC controller.
You can use a fuse tap to access an accessory control voltage.
