what is this for?

[HackitZ]

so i was looking undwer the hood last night and noticed this empty hole. looks like a light maybe goes here. but i noticed it's in line with the hole below low it. i've included some picks.

 

[mikeru82]

The '21 Limited I used to own had a switch in the lower hole and a plastic piece in the upper hole. I couldn't tell you what their purpose is, but maybe someone else can chime in.

 

[wegasque]

Yes, I've got one on my Limited. It's the switch for the hood open warning light.

 

[Scram1500]

I don't have that switch but still get the hood open light

 

[mikeru82]

I've read the hood open light switch is in the actual latch. I've always wondered if this "extra" switch is for trucks with air suspension since you can't lower it with the hood open. Although I don't know why that system wouldn't just use the hood open switch in the latch

 

[HSKR R/T]

Think it might be more for factory security alarm.

 

[mikeru82]

Possibly, but there's no mention of the hood being monitored by the alarm system...

 

[Jimmy07]

It is for the secondary hood ajar sensor for etorque equipped trucks. The hood ajar sensor in the hood latch is monitored by the BCM for the vehicle theft alarm, remote start, and hood ajar messages in the cluster. The second hood ajar sensor is monitored by the PCM for start/stop. If that sensor circuit is open, start/stop will not function (same with the secondary door ajar circuit on the driver door for etorque equipped trucks).

 

[mikeru82]

@Jimmy07 FTW!

 

[Insanity]

It is for the secondary hood ajar sensor for etorque equipped trucks. The hood ajar sensor in the hood latch is monitored by the BCM for the vehicle theft alarm, remote start, and hood ajar messages in the cluster. The second hood ajar sensor is monitored by the PCM for start/stop. If that sensor circuit is open, start/stop will not function (same with the secondary door ajar circuit on the driver door for etorque equipped trucks).

These are present on my bighorn w/etorque.

 

[Jimmy07]

These are present on my bighorn w/etorque.

As they should be, for the reason stated above.

 

[Belvedere]

Great now that I've seen the empty holes they will always be the first things I see when I pop the hood. Never noticed them till I saw this...

 

[MannyN]

Great now that I've seen the empty holes they will always be the first things I see when I pop the hood. Never noticed them till I saw this...

Just put sticker over the hole, adds 10 hp to it also.

 

[LaxDfns15]

Just put sticker over the hole, adds 10 hp to it also.

Only if it's a K&N sticker.

 

[wegasque]

Only if it's a K&N sticker.

Adds 20hp if 3.92.
25 hp if 3.92 and 5W30.

 

[Belvedere]

I'll be back... gotta go find some stickers. Not sure I want my daughter's unicorns or bunnies...

 

[BowDown]

I've read the hood open light switch is in the actual latch. I've always wondered if this "extra" switch is for trucks with air suspension since you can't lower it with the hood open. Although I don't know why that system wouldn't just use the hood open switch in the latch

I can both raise and lower mine with the hood open.
I believe that switch disables auto stop/start when the hood is open

 

[BowDown]

It is for the secondary hood ajar sensor for etorque equipped trucks. The hood ajar sensor in the hood latch is monitored by the BCM for the vehicle theft alarm, remote start, and hood ajar messages in the cluster. The second hood ajar sensor is monitored by the PCM for start/stop. If that sensor circuit is open, start/stop will not function (same with the secondary door ajar circuit on the driver door for etorque equipped trucks).

What he said

 

[Scram1500]

Be a good spot for an engine bay light switch for us non e-torque types

 

[mikeru82]

I can both raise and lower mine with the hood open.

Strange that mine wouldn't go up or down with the hood open. Our current 2020 Limited won't either.

I believe that switch disables auto stop/start when the hood is open

It's easy to know the answer after Jimmy already explained what it's for.