Sprinter-Forum    
 

Go Back   Sprinter-Forum > NCV3 Sprinters > NCV3 Talk

NCV3 Talk General Discussions related to NCV3 Sprinters.


 
Thread Tools Display Modes
Old 01-14-2020, 12:09 AM   #1
Fgauthier
 
Join Date: Feb 2019
Posts: 4
Thanks: 1
Thanked 0 Times in 0 Posts
Default Taping into the dome light to get 12 volts USB

Does anyone have a clean solution to provide 2A USB power from the dome light? Trying to power a few accessories in a clean solution

Thanks

Francois
RB Components 2018 Sprinter 170 4x4 Ext.
Fgauthier is offline   Reply With Quote
Old 01-14-2020, 08:10 AM   #2
sparkplug
 
Join Date: Feb 2015
Location: UK
Posts: 465
Thanks: 94
Thanked 210 Times in 157 Posts
Default Re: Taping into the dome light to get 12 volts USB

I looked at mine and then read about all the people who struggle to even get the dome lights to work correctly without messing around with them and decided this was probably not going to be a good source.

I don't use the power outlet in the slide out cup holder so my plan is to run a wire off the back of that and route it up through the dash.

You could easily run it up the A pillar and into the headliner.

A lot more panels to be removed for sure, but I think a better and more reliable solution long term.
__________________
MWB 2008 Mercedes Sprinter 311 CDi (UK RHD) in the faster DHL Yellow colour
sparkplug is offline   Reply With Quote
Old 01-14-2020, 11:18 AM   #3
eralimited57
 
Join Date: Oct 2013
Posts: 539
Thanks: 196
Thanked 143 Times in 90 Posts
Default Re: Taping into the dome light to get 12 volts USB

Best is to use a fuse tap and tap into one of the reserve sockets under the driver's seat. There are reserve sockets in that fuse block that are active when the key is on and the engine is off. The fuse block under the driver seat is intended to be used for build outs.
eralimited57 is offline   Reply With Quote
Old 01-14-2020, 03:37 PM   #4
Aqua Puttana
Poly - Thread Finder
 
Aqua Puttana's Avatar
 
Join Date: Apr 2008
Location: The Falls of Niagara, USA
Posts: 25,643
Thanks: 13,377
Thanked 14,571 Times in 9,257 Posts
Default Re: Taping into the dome light to get 12 volts USB

Quote:
Originally Posted by Fgauthier View Post
Does anyone have a clean solution to provide 2A USB power from the dome light? Trying to power a few accessories in a clean solution

Thanks

Francois
RB Components 2018 Sprinter 170 4x4 Ext.
Reports are that the NCV3 interior lamps have a local constant 12+ volt source. It may be necessary to establish a constant ground. A simple sheet metal screw into a support rib could supply that... not up into the roof.

The USB 5 volt units I used have a bit of drain even with nothing plugged in so I included an on/off switch.

Tapping the T1N interior light circuit for the low loading of USB units has worked great for me. Some info for my T1N installs is here. It may give you some ideas for your NCV3.

Hack in USB Charging
https://sprinter-source.com/forum/sh...532#post762532

vic
__________________
DAD NAS (N. Amer. Spec) 2004 140 2500 >330,000+ mi. Arctic Whitewash Brush-tone Grey
2006 Freightliner 140 2500HC >183,000+ mi. Arctic Whitewash (Spotted Snow Leopard accents)
"My opinion and worth everything you'll never pay for it." assumed.
Anyone can hold the helm when the sea is calm. Publilius Syrus
"There are only 10 types of people in the world: Those who understand binary, and those who don't." HaWiiLuVeR
16 ounces of unnecessary prevention can be worth a pound of manure.
Aqua Puttana is offline   Reply With Quote
The Following User Says Thank You to Aqua Puttana For This Useful Post:
manwithgun (01-14-2020)
Old 01-14-2020, 05:05 PM   #5
Fgauthier
 
Join Date: Feb 2019
Posts: 4
Thanks: 1
Thanked 0 Times in 0 Posts
Default Re: Taping into the dome light to get 12 volts USB

Thanks all for your answer. I think I will rebound from the dash and A-Pilar and avoid taping the dome light.

Regards
Fgauthier is offline   Reply With Quote
Old 01-14-2020, 05:22 PM   #6
manwithgun
 
manwithgun's Avatar
 
Join Date: Apr 2013
Location: Huntington Beach, CA
Posts: 371
Thanks: 246
Thanked 329 Times in 208 Posts
Default Re: Taping into the dome light to get 12 volts USB

I second all of the info posted by Aqua above. The RED wire on the NCV3 dome light is a constant +12vdc that is fused. This can be spliced/tapped to source power. By then creating your own ground point to serve as the negative, you pretty much isolate the usb load from the BCM that “controls” the dome light switching function. If there are any solid brown wires in the headliner, this would likely be a factory grounding point that can also be used. Add your own switch to open and close either the positive + (red) or negative wires feeding the USB port since most that I have used are internally illuminated.

I have used these for compact switches where space is limited, and their larger big brother when space allows. https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

https://www.amazon.com/stores/node/1...eb_19858731011
__________________
2007 Dodge Sprinter 2500 144WB V6 OM642 NCV3 CRD
manwithgun is offline   Reply With Quote
The Following 2 Users Say Thank You to manwithgun For This Useful Post:
Aqua Puttana (01-14-2020), Mickyfin (02-12-2020)
Old 02-12-2020, 06:06 AM   #7
Fgauthier
 
Join Date: Feb 2019
Posts: 4
Thanks: 1
Thanked 0 Times in 0 Posts
Default Re: Taping into the dome light to get 12 volts USB

Great info. Thanks again
Fgauthier is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT. The time now is 12:00 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.