Sponsored

SJaYx2P

Well-Known Member
Joined
Dec 7, 2021
Threads
9
Messages
106
Reaction score
107
Location
San Jose
Vehicles
Tacoma
How's the visibility through the rearview mirror? (Bonus for photos)

Have you figured out how to close the tailgate from inside the camper yet? ?
Visibility is good. It's hard to take a picture of the mirror but you get the idea.
Rivian R1T R1S Go Fast Camper for R1T Announced image0 (2)


The tailgate is surprisingly light. What's annoying is the length. I'm able to close it just fine sitting inside. I did practice this before install lol.
Sponsored

 

kylealden

Well-Known Member
First Name
Kyle
Joined
Feb 25, 2021
Threads
20
Messages
1,458
Reaction score
4,461
Location
Seattle
Vehicles
2022 Rivian R1T LE (QM/L), 2024 Zero DSR/X
Occupation
Product Management
They did not hook up the brake light or provide guidance. I don't believe they do this for any of the installs due to liability. I don't plan on ever connecting it unless someone figures out where to tap. I might even remove it completely so it's not seen as a "broken light"
This is a bummer. I'll need to carry bikes on the back so an inoperative CHMSL is a dealbreaker for me. Hoping someone is able to give guidance out the wiring soon, I don't mind doing the work but am reluctant to play amateur electrician without instructions.
 

jctownsley

Active Member
First Name
Josh
Joined
Mar 25, 2024
Threads
0
Messages
35
Reaction score
37
Location
Portland, OR
Vehicles
2022 R1T LE Quad, Large Forest Green
This is a bummer. I'll need to carry bikes on the back so an inoperative CHMSL is a dealbreaker for me. Hoping someone is able to give guidance out the wiring soon, I don't mind doing the work but am reluctant to play amateur electrician without instructions.
There are probably some easy options to do a 3rd light through the towing harness connection. I know some bike racks come with that already. But then you give up some of the Driver + features right? Or does the tow accessory setting in the rivian settings fix that?
 

kylealden

Well-Known Member
First Name
Kyle
Joined
Feb 25, 2021
Threads
20
Messages
1,458
Reaction score
4,461
Location
Seattle
Vehicles
2022 Rivian R1T LE (QM/L), 2024 Zero DSR/X
Occupation
Product Management
There are probably some easy options to do a 3rd light through the towing harness connection. I know some bike racks come with that already. But then you give up some of the Driver + features right? Or does the tow accessory setting in the rivian settings fix that?
Tow accessory doesn't fix it, unfortunately - it just turns off the rear prox sensor warnings. (I've been complaining about this for a long time since my bike rack's brake light uses the tow harness.)

I'm sure there's a wire you can tap into if you take enough of the bed liner apart, in the worst case, but I'd prefer not to go spelunking...
 

Sponsored

jjswan33

Well-Known Member
First Name
Joshua
Joined
Sep 17, 2021
Threads
135
Messages
4,455
Reaction score
9,880
Location
Sandy, OR
Vehicles
Rivian R1T LE, Hyundai Ioniq 5 Limited
Occupation
Engineer
Clubs
 
Tow accessory doesn't fix it, unfortunately - it just turns off the rear prox sensor warnings. (I've been complaining about this for a long time since my bike rack's brake light uses the tow harness.)

I'm sure there's a wire you can tap into if you take enough of the bed liner apart, in the worst case, but I'd prefer not to go spelunking...
For all of you hoping to tap the brake lights somehow, it's very complicated. The left/right tail light (at least in my truck, usual YMMV) had 4 lines that appeared to be ground, always on power (when the truck is awake), and two signal wires.

Only solution to getting an 'operable' brake light is to use a Tekonsha controller that is on the ground but pointed away from the light on both sides and then feeding that into a 2 to 3 converter. It was a PIA and meant taking the bed apart every time I wanted to take the camper off.

So yes it's doable but it was still buggy and a PIA... Hopefully there is a better way but I suspect not until Rivian eases restrictions on the trailer connection or releases the long ago promised brake light accessory.

https://www.rivianforums.com/forum/threads/rooftop-tents-blocking-brake-lights-chmsl.5014/page-4

I outlined my experience on page 4 of an old thread of yours. Good luck folks, hope there is a better solution that I couldn't find.
 

HighVoltOverland

Well-Known Member
Joined
Jul 6, 2021
Threads
21
Messages
752
Reaction score
1,564
Location
Laguna Beach
Vehicles
GW/OC R1T | Tesla MY
Occupation
Retired-ish
Clubs
 
For all of you hoping to tap the brake lights somehow, it's very complicated. The left/right tail light (at least in my truck, usual YMMV) had 4 lines that appeared to be ground, always on power (when the truck is awake), and two signal wires.

Only solution to getting an 'operable' brake light is to use a Tekonsha controller that is on the ground but pointed away from the light on both sides and then feeding that into a 2 to 3 converter. It was a PIA and meant taking the bed apart every time I wanted to take the camper off.

So yes it's doable but it was still buggy and a PIA... Hopefully there is a better way but I suspect not until Rivian eases restrictions on the trailer connection or releases the long ago promised brake light accessory.

https://www.rivianforums.com/forum/threads/rooftop-tents-blocking-brake-lights-chmsl.5014/page-4

I outlined my experience on page 4 of an old thread of yours. Good luck folks, hope there is a better solution that I couldn't find.

To reference myself with additional info:
"
Spoke to my buddy today who works at Rivian
He showed me where the wire to the chmsl is in the rear passenger pillar
He mentioned that the service trucks use this same location for their auxiliary light

I’ll share pictures later in the week when I wire mine up
"

To add, he has a full brake light wired up under his RTT using this direct wire lighting method

No converter or anything needed.

I'm tempted to buy a cheap light from HF today just to pre wire before install so I can potentially share the knowledge with the rest of the tribe
 

jjswan33

Well-Known Member
First Name
Joshua
Joined
Sep 17, 2021
Threads
135
Messages
4,455
Reaction score
9,880
Location
Sandy, OR
Vehicles
Rivian R1T LE, Hyundai Ioniq 5 Limited
Occupation
Engineer
Clubs
 
To reference myself with additional info:
"
Spoke to my buddy today who works at Rivian
He showed me where the wire to the chmsl is in the rear passenger pillar
He mentioned that the service trucks use this same location for their auxiliary light

I’ll share pictures later in the week when I wire mine up
"

To add, he has a full brake light wired up under his RTT using this direct wire lighting method

No converter or anything needed.

I'm tempted to buy a cheap light from HF today just to pre wire before install so I can potentially share the knowledge with the rest of the tribe
Yes plugging into the existing CHMSL wiring is great solution. Glad you have some inside information. Good luck.
 

Sponsored

R1Thor

Well-Known Member
First Name
Joe
Joined
Aug 9, 2023
Threads
8
Messages
1,537
Reaction score
2,424
Location
Lancaster, PA
Vehicles
23QM R1T, Limestone + Ocean Coast, 21" & UBS
Occupation
Mechanical Engineering Lead
Clubs
 
Yes plugging into the existing CHMSL wiring is great solution. Glad you have some inside information. Good luck.
What if--hear me out, I'm an ME, not an EE, and I'm just getting into controls-- you use a small photo sensor to trigger an ESP32 or Arduino to light the remote brake light. Your only challenge is how to power it at that point (so, you'd really only need power and ground).

You could mount the light sensor near the brake light (maybe a lux sensor that can be calibrated for the intensity or spectrum of the red light from the brake light if the area isn't sealed well from ambient light), and it'd simply trigger a relay to light up your extended brake light?

Just an idea. Seems relatively kit-able. And a good way to work around having to tap into the truck's interface.
 

jjswan33

Well-Known Member
First Name
Joshua
Joined
Sep 17, 2021
Threads
135
Messages
4,455
Reaction score
9,880
Location
Sandy, OR
Vehicles
Rivian R1T LE, Hyundai Ioniq 5 Limited
Occupation
Engineer
Clubs
 
What if--hear me out, I'm an ME, not an EE, and I'm just getting into controls-- you use a small photo sensor to trigger an ESP32 or Arduino to light the remote brake light. Your only challenge is how to power it at that point (so, you'd really only need power and ground).

You could mount the light sensor near the brake light (maybe a lux sensor that can be calibrated for the intensity or spectrum of the red light from the brake light if the area isn't sealed well from ambient light), and it'd simply trigger a relay to light up your extended brake light?

Just an idea. Seems relatively kit-able. And a good way to work around having to tap into the truck's interface.
I know @LivingInKaos was considering such an approach. I would argue though that Rivian should just make it easier.

FWIW most folks with camper shells should have 12V power available, at least I do to run lights, fans, etc in the bed.
 

R1Thor

Well-Known Member
First Name
Joe
Joined
Aug 9, 2023
Threads
8
Messages
1,537
Reaction score
2,424
Location
Lancaster, PA
Vehicles
23QM R1T, Limestone + Ocean Coast, 21" & UBS
Occupation
Mechanical Engineering Lead
Clubs
 
FWIW most folks with camper shells should have 12V power available, at least I do to run lights, fans, etc in the bed.
I think everyone (not just campers) should have some auxiliary access to the 12V system. I think I ranted about this when someone was asking where to tap in a Gen2 for some DC Power and couldn't figure out out due to 1- not having physical fuses to fuse-tap into and 2- Rivian stonewalling them when they asked.
 

LivingInKaos

Well-Known Member
Joined
Jun 30, 2022
Threads
19
Messages
987
Reaction score
1,944
Location
Oregon
Vehicles
R1T Launch Green Forest Edge
Occupation
Own Fabrication Company / VP of Portland Rivian Club
Clubs
 
I know @LivingInKaos was considering such an approach. I would argue though that Rivian should just make it easier.

FWIW most folks with camper shells should have 12V power available, at least I do to run lights, fans, etc in the bed.
When I asked at the Super Pacific event how they triggered the 3rd brake light, I actually laughed. The guy asked why I thought that was funny. I told him that I was thinking along these lines 6 months ago. Have to wonder if my post on that was inspiration? I also gave them an idea on how to trigger locks in the camper from the vehicle when it locks... I should not talk out loud sometimes.....
Sponsored

 
 








Top