Go Back   DIY Chatroom Home Improvement Forum > Do It Yourself > Automotive Repairs

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 04-30-2014, 08:49 PM   #1
Member
 
Join Date: Feb 2009
Location: Minnesota
Posts: 77
Share |
Default

New trailer wiring harness: All pins have constant 12v!!


I just installed a Curt trailer wiring harness (4 pin) on my 07 Honda Odyssey. Followed the directions to a T and had no problems. I put this wiring harness on so I can rent a Uhaul trailer. But since I don't have the trailer yet to test it with, I used my multimeter.

So to check the DC voltage, I connect the black lead on my multimeter to the big male prong on the harness (which goes to the white wire and is ground from what I've read), and then I used the red lead to test the three individual female pin slots. Problem is, no matter what I do, all the pins read 12v, even with the vehicle turned off. No change when I test the turn signals, brake lights, etc. -- all pins stay at a constant 12v.

The wires and insulation from the wiring kit and the harness and the plug all look to be in good shape and I can't see any cracks, nicks or places where there might be shorts.

Does anyone who knows more about auto wiring than I have any advice? I made sure it plugged into my van's top right electrical slot, which is what the directions for this and all the other wiring kits say to do. I also installed the two fuses -- one inline and the other in the van's fuse box. I have the ground wire connected to a really solid ground screw attached to the frame.

Do I just have a defective wiring kit that is shorting out all the wires?


Last edited by Studly; 04-30-2014 at 08:53 PM.
Studly is offline   Reply With Quote
Old 05-01-2014, 07:15 AM   #2
Member
 
Join Date: Jan 2010
Location: Saskatoon Sk. Canada
Posts: 413
Default

New trailer wiring harness: All pins have constant 12v!!


I agree the big white wire is usually the ground, but have you verified that it actually is?

daveb1 is offline   Reply With Quote
Old 05-01-2014, 08:26 AM   #3
Member
 
Join Date: Feb 2009
Location: Minnesota
Posts: 77
Default

New trailer wiring harness: All pins have constant 12v!!


Quote:
Originally Posted by daveb1 View Post
I agree the big white wire is usually the ground, but have you verified that it actually is?
Yes, when I touch the black lead to the grounded frame of the vehicle and then test the other pins, I get the same readings too.
Studly is offline   Reply With Quote
Old 05-01-2014, 08:59 AM   #4
Member
 
Join Date: Jul 2010
Posts: 1,720
Default

New trailer wiring harness: All pins have constant 12v!!


Are you using a digital meter? I can't say that it could be giving you false readings in this case, but have seen it on AC readings. I don't know how to post pictures, but, for something like this, I almost always start with a simple 12 volt tester with a light in the handle, a probe, and a wire with a clamp to attach to any available ground. Then, if I want to get more precise, use an analog meter. Either are available for a few bucks at most hardware or auto parts stores, and probably big boxes.
DexterII is offline   Reply With Quote
Old 05-01-2014, 09:16 AM   #5
Member
 
Join Date: Feb 2009
Location: Minnesota
Posts: 77
Default

New trailer wiring harness: All pins have constant 12v!!


Quote:
Originally Posted by DexterII View Post
Are you using a digital meter? I can't say that it could be giving you false readings in this case, but have seen it on AC readings. I don't know how to post pictures, but, for something like this, I almost always start with a simple 12 volt tester with a light in the handle, a probe, and a wire with a clamp to attach to any available ground. Then, if I want to get more precise, use an analog meter. Either are available for a few bucks at most hardware or auto parts stores, and probably big boxes.
Yes, I'm using a digital one. Thanks for the tip. I'll try something else that's not digital.
Studly is offline   Reply With Quote
Old 05-01-2014, 09:29 AM   #6
Member
 
Join Date: Feb 2009
Location: Minnesota
Posts: 77
Default

New trailer wiring harness: All pins have constant 12v!!


Quote:
Originally Posted by DexterII View Post
Are you using a digital meter? I can't say that it could be giving you false readings in this case, but have seen it on AC readings. I don't know how to post pictures, but, for something like this, I almost always start with a simple 12 volt tester with a light in the handle, a probe, and a wire with a clamp to attach to any available ground. Then, if I want to get more precise, use an analog meter. Either are available for a few bucks at most hardware or auto parts stores, and probably big boxes.
Hey, you're right. Just talked to tech support for the Curt wiring kit and they said that a multimeter will show 12v across all pins of the harness, but because there are no amps, you can't go by that because for the wires to be on, they need volts and amps. He too suggested I get a regular 12 volt tester with a light because that will show both amps and volts when it lights up. Thanks again for the help!

Studly is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Kitcheaid Freezer wiring Harness replacement db819 Appliances 2 03-11-2008 09:55 AM
trailer wiring problem dns Automotive Repairs 2 10-09-2007 02:50 PM
trailer wiring econdave Automotive Repairs 15 07-10-2007 05:47 PM
Trailer Wiring No Blink But Hazards Jamn68j Electrical 1 05-22-2007 10:01 PM
Knob & Tube wiring - How concerned should we be? hotdiggitydog Electrical 6 04-11-2006 07:52 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.