DC barrel plug

Reply

  #1  
Old 11-02-15, 02:22 PM
S
Member
Thread Starter
Join Date: May 2007
Posts: 56
Received 0 Votes on 0 Posts
DC barrel plug

I'm trying to replace the plug on my radar. The power wire has several colored wires that have all been clipped except the red and black which were soldered to the +12 terminal. It appears the metal shielding has been stripped on one side then soldered to the side terminal for a ground...is this correct?

I replicated what appears in the original plug but keep blowing fuses...


 
  #2  
Old 11-02-15, 02:42 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 60,773
Received 1,324 Votes on 1,224 Posts
It would be more likely that the red wire connects to the center pin and the black connects to the shell of the plug.
 
  #3  
Old 11-02-15, 03:56 PM
S
Member
Thread Starter
Join Date: May 2007
Posts: 56
Received 0 Votes on 0 Posts
That's what I thought but I even looked at my partners and it seems to be the same..here are pics of his
Imgur: The most awesome images on the Internet
Imgur: The most awesome images on the Internet
 
  #4  
Old 11-02-15, 04:03 PM
S
Member
Thread Starter
Join Date: May 2007
Posts: 56
Received 0 Votes on 0 Posts
It is a moving radar unit so I assume the red and black wires each power a separate crystal
 
  #5  
Old 11-02-15, 04:25 PM
S
Member
Thread Starter
Join Date: May 2007
Posts: 56
Received 0 Votes on 0 Posts
  #6  
Old 11-02-15, 05:10 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 60,773
Received 1,324 Votes on 1,224 Posts
This is a coaxial or barrel plug.
Name:  barellel plug.jpg
Views: 421
Size:  3.1 KB

That is called a cigarette lighter plug.

In the picture below..... the red is connected to the center clip that contains the end of the fuse. In the picture that clip is pushed left and is covering the ground connection from our view. The wire in the clear tube, which should be black, goes to the blue clip.

Name:  plug.jpg
Views: 180
Size:  35.7 KB

Name:  ltr plug.jpg
Views: 195
Size:  20.5 KB
 
  #7  
Old 11-02-15, 06:35 PM
S
Member
Thread Starter
Join Date: May 2007
Posts: 56
Received 0 Votes on 0 Posts
In the red box you circled, both the red and black wire are soldered to the terminal from the factory...so I know that is correct... I just wanted to make sure that the shielding can be used as ground and someone hadn't rigged it at some point.

I thought cigarette plugs were also called barrel plugs...sorry about the incorrect terminology.

There is continuity between the shielding and all the wires...so there has to be a short somewhere else...all this started because I lost the tip and couldn't find a replacement
 
  #8  
Old 11-02-15, 07:02 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 60,773
Received 1,324 Votes on 1,224 Posts
Hard to see in the picture but yes..... the shield can be used to carry the ground connection.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: