Originally Posted by Byron Kinnaman
Interesting, something is wired differently than in Dakota and was in my Blazer. Mine doesn't come on until I press the brake pedal. When freeway driving and I don't tough the brakes
for a while it goes off. (bake to sleep). I went out and checked that it was off until bake pedal push today and again with had a meeting to go to tonight.
Byron, you got me thinking so I just went out and checked again and I am mistaken, the Frontier does behave a little different than the Subaru in regards to what wakes up the controller and what does not.
Not sure if any of this will actually help the OP with their problem or not but it seems to indicate there may be subtle differences between vehicles as to how the controller wakes up & behaves on waking up.
I can't say for sure as to why the difference in behaviour but The Frontier came with a factory installed tow package - a simple plug and play set up. The Subaru needed the brake controller wiring run from scratch as it only came with the trailers running lights
prewired at the factory. Funny enough its the Frontier that the display on the controller does not respond as the manual for the controller suggest it should when the controller first wakes up & no trailer attached & I put my foot on the brake.
The Subaru controller wakes up (small red dot light
comes on) as soon as the alarm system is deactivated & an interior light
comes on with that. If no trailer connected it goes back to sleep after a short time. The first time you put your foot on the brake the controller will read NC and then shortly after change to just the small dot light
again and then eventually fall
back to sleep again if no trailer attached. When I connect the trailer the reading on the controller will change to a "C" and then change to the numbers when I put the brakes
On the Frontier the brake controller does not wake up until the truck is actually running and I put my foot on the brake for the first time. But when it wakes up only the dot lights
come on, no "NC" reading as the controllers manual says it should. It also goes back to sleep if no trailer attached. It does read NC if I pull the manual knob on the the controller though. The controller behaves the same as on the Subaru once the trailer is connected - first the "C" reading which changes to the numbers once the brake is pressed.
I have not had an unusal battery
run down issue with either vehicle.
Here is the Tekonsha PDF manual for the controller
which gives more details on how it should be wired and responding.