Sprinter-Forum    
 

Go Back   Sprinter-Forum > T1N Sprinters > T1N Talk

T1N Talk General Discussions related to T1N Sprinters.


 
Thread Tools Display Modes
Old 05-25-2019, 02:57 PM   #1
rock_fencer
 
Join Date: Jun 2018
Posts: 11
Thanks: 5
Thanked 0 Times in 0 Posts
Default TCM Radio/Data-line Connector wire in stereo harness

Hello T1N world,

Iím trying to install a Pioneer AVH-3500NEX stereo in my 2005 dodge Sprinter. In the OEM stereo wiring harness there is a blue wire in the A2 position that correlates to the label TCM/Radio Data Link Connector. Any idea what this is and where it might connect to (if at all) into my new stereo? Also any ideas for the wire labeled Speed Sensor (blue, white, and red wire)?

Cheers,
T
rock_fencer is offline   Reply With Quote
Old 05-25-2019, 04:20 PM   #2
autostaretx
Erratic Member
 
autostaretx's Avatar
 
Join Date: Sep 2006
Location: Seattle
Posts: 17,098
Thanks: 3,004
Thanked 7,670 Times in 5,611 Posts
Default Re: TCM Radio/Data-line Connector wire in stereo harness

The original Becker radios in the US-delivered T1N Sprinters use the "speed sense" wire to increase volume as you go faster (countering the louder road noise).

It's a pulse whose frequency increases with speed. If memory serves, you get about 1000 pulses per mile.
(so at 60 mph you get 1000 pulses per minute, or 16.7 pulses per second)

According to the T1N service manual, the speed sense wire was a 20 gauge Blue/Red/White wire to pin 9 on the connector.
It's the only 20 gauge wire MB fed to the radio.

--dick
__________________
2005 T1N 118" Freightliner 2500 Passenger Wagon (2.7L, 15" tires, standard (short) roof)
Get YOUR Sprinter's full configuration datacard by entering your VIN to https://www.datamb.com/
http://diysprinter.co.uk/reference <-- lots of service documentation, Thanks to Jens Moller and Arnie_Oli
((as always: this post may go through a couple of post-posting edits... so maybe give it ten minutes before commenting))
autostaretx is offline   Reply With Quote
Old 05-25-2019, 05:58 PM   #3
ReGULT51
 
Join Date: Jun 2010
Location: SoCal
Posts: 244
Thanks: 250
Thanked 53 Times in 37 Posts
Default Re: TCM Radio/Data-line Connector wire in stereo harness

I just installed a 3400nex. If I recall, there were two wires I didn’t use. One was the speed sensor wire. I think there was also a blue wire that I believe was used for the optional cellular antenna/audio. I left both unconnected. The service manual has a wiring schematic for the audio. Section 8w-47 is what I used for reference.
__________________
-r51
2004 2500/118"
2014 3500/144"
ReGULT51 is offline   Reply With Quote
The Following User Says Thank You to ReGULT51 For This Useful Post:
rock_fencer (05-26-2019)
Old 05-26-2019, 12:58 PM   #4
rock_fencer
 
Join Date: Jun 2018
Posts: 11
Thanks: 5
Thanked 0 Times in 0 Posts
Default Re: TCM Radio/Data-line Connector wire in stereo harness

Yeah we have been using the '04/'05 wiring diagrams and couldnt find anything so figured we would throw it out there!! Cheers
rock_fencer 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 09:24 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2019, vBulletin Solutions, Inc.