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Passive lock/unlock stopped working?

Will_T

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The handle and buttons on the front doors no longer work even when the remotes are right there. Tailgate also behaving the same. Tried with both remotes. If I use the remote itself, lock/unlock works fine it is just the passive door handle and button and tailgate button that is not working. Sort of like the truck is not sensing the remotes. But when I grab the door handle, even though it won't unlock, the EVIC lights up and the push to start message comes on. Unlocking with the remote and then starting the truck works fine.
 
Update. It is working this morning. I noticed yesterday after posting that the battery tender, (shown below), I have used for over two years was showing a red led rather than the green it usually shows which was weird. Thought batteries, so I opened the truck with the remote and started it. Started right up without any indication of weak batteries. This even though I currently have the grid heater hooked up, and it was cycling when I double tapped to start. (I hook the relay back up whenever the truck has to go to the dealer and a couple of weeks ago it was in for oil and filters and I have not disconnected it since.)

We have had a couple of short power outages recently, one yesterday, and I thought maybe when the power came back on and everything on the property started back up at the same time, maybe the voltage was low to the NOCO and it did not cycle back on properly. (It is at the end of a 100' extension cord plugged into a barn outlet which is already the furthest place from the main panel so there is potential for voltage being low when everything else came back on at the same time).

As noted, the truck started right up but maybe could still be the batteries? I guess I should have them tested. They are four years old now so may be time to think about replacing them regardless.

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