[Hap17]

Twice my headlights have turned on by themselves. The truck was in my garage with the lights on auto. Had not driven the truck either day. Just walked in and found them on. Anyone have this issue or have any idea what is causing this?

 

[Sparkland]

Twice my headlights have turned on by themselves. The truck was in my garage with the lights on auto. Had not driven the truck either day. Just walked in and found them on. Anyone have this issue or have any idea what is causing this?

From @zroger73, "2. Auto on/off means that the headlights automatically turn on when it's dark and off when it's light when the headlight switch is set to "AUTO". If you left the headlights on when you shut off the truck, they will automatically turn on when the fob is detected. When you entered the garage the vehicle detected your fob.

Auto Headlights on RTL-E

I went into my local Honda dealer today to test drive a 2018 RTL-E only to find it was still in the back lot. The dealer printed out for me a 31 page 2018 Ridgeline Specs and Features which I've just been reading. I have a question that maybe one of the RTL-E owners can answer. Under the...

www.ridgelineownersclub.com

 

[smufguy]

If you find that @zroger73 's statement to be false, then you may need to call a local priest who can exorcise vehicular demons.

 

[Hap17]

In the 5 years I have owned this 2017 Sport it has only done this 3 times. Twice yesterday and once about a month ago. The third time being after I posted this last night. I had been in the garage for about an hour heard a click and the lights were on. Until now I left the lights on auto and they came on when the truck was turned on and it was dark enough for the sensor to turn them on. The fob never turned them on. I think something is wrong.

 

[ferrari1898]

Twice my headlights have turned on by themselves. The truck was in my garage with the lights on auto. Had not driven the truck either day. Just walked in and found them on. Anyone have this issue or have any idea what is causing this?

All the time. If you locate the turn signal switch (seems to be tougher for some drivers than others) you will find a dial at the end to control the headlights which has a setting "Auto". This stands for automatic lights not automotive lights. When it gets dark and/or you have the windshield wipers on, the headlights will turn on.

If you do not have an "Auto" setting you may want to try the time honored IT solution of unplugging (remove the battery) and reboot the truck.

 

[njamesj]

Is it possible the driver door was slightly ajar? The headlights in the auto position will come on when the driver door is opened even without the fob nearby.

 

[Hap17]

Is it possible the driver door was slightly ajar? The headlights in the auto position will come on when the driver door is opened even without the fob nearby.

I wish it was that but I don’t think so. The truck is off with doors closed and the lights just come on. I did hear a click like you hear when you push the start button.

 

[njamesj]

I wish it was that but I don’t think so. The truck is off with doors closed and the lights just come on. I did hear a click like you hear when you push the start button.

Perhaps the door sensor is at fault. Your truck is 5 years old. Has this started happening just recently?

 

[Hap17]

This happened once about a month ago then twice a few days ago. My lights never come on when the doors open. Only when the truck is turned on. This is a Sport so perhaps some of the higher trims do. IDK but I think there is a control module that could cause this as I have seen on 3rd gen pilot in a forum.

 

[Hap17]

Update: Now my alarm will activate for no reason. Based on other post here I think my MICU is bad.

 

[Happy Tom]

Update: Now my alarm will activate for no reason. Based on other post here I think my MICU is bad.

Hopefully this is not the case, sounds expensive to diagnose and fix. Wonder if the second fob could be involved. Perhaps stored in proximity to the vehicle and getting unintended button pushes?
The previously stated idea of disconnecting the battery is reboot also seems like a good idea.

 

[Hap17]

Actually the second fob was far away from the truck when this happened last time (like 2 hours driver away). I have actually replaced the battery since all this started. I guess I will take it to the dealership service dept.