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07-25-2017, 12:06 PM
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#1
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Junior Member
Join Date: Sep 2016
Location: Ontario
Posts: 20
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Wiring
I'm hooking up a new plug on my dash for my GPS and TPS. My old plug has a yellow white and a white wire. My understanding is the white is always neutral. That would make the Yellow hot. Which is plus and minus? Am I right. I don't want to mix the polarity.
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07-25-2017, 12:08 PM
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#2
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Senior Member
Join Date: Apr 2017
Posts: 436
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The only way to know for sure is to use a multimeter.
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07-25-2017, 12:08 PM
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#3
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Member
Join Date: Jul 2017
Posts: 50
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Never assume anything with electrical wiring. Better put a meter on it and see what you're working with.
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07-25-2017, 12:10 PM
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#4
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Senior Member
Monaco Owners Club Grand Design Owners Club
Join Date: Aug 2016
Posts: 250
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Quote:
Originally Posted by Gibby3398
I'm hooking up a new plug on my dash for my GPS and TPS. My old plug has a yellow white and a white wire. My understanding is the white is always neutral. That would make the Yellow hot. Which is plus and minus? Am I right. I don't want to mix the polarity.
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When in doubt...and you should always be in doubt, put a meter on it. If the needle swings to 12v, your black meter lead is negative. If the needle bounces backwards agains the post (or reads -12v on digital) then switch your leads and you will have the definitive answer.
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2002 Monaco Executive
Cummins 500ISM (11L)
Castle Rock, CO
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07-25-2017, 01:53 PM
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#5
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Senior Member
Winnebago Owners Club Freightliner Owners Club
Join Date: Mar 2008
Location: Southern Ontario
Posts: 1,381
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Wiñnebago use yellow wiring for the positive 12 volt lead. Check the wiring diagram or use a volt meter to confirm. The "other" wire in 12 volt DC systems is the ground. In AC systems, the term neutral is used and it is connected to the system ground in the distribution box. Good luck and be sure to check and then check again to be certain when working with any wiring.
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Bob
09 Journey 39Z
Southern Ontario
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07-25-2017, 05:31 PM
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#6
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Junior Member
Join Date: Sep 2016
Location: Ontario
Posts: 20
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Thank you for all the advice. All hooked up and working fine. I learn something every time I post here. Thanks again
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07-25-2017, 06:17 PM
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#7
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,678
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For future reference, "White is always neutral" is true only for alternating current circuits (e.g.120vac). There is no accepted color standard for DC circuits, so always use your meter to determine what is what.
Besides "neutral" is an alternating current term. Direct current has plus & minus, one of which will be considered the ground side. In RVs and vehicles and most a;; DC applications, the negative side will be ground.
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Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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07-25-2017, 07:18 PM
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#8
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Senior Member
Nor'easters Club Holiday Rambler Owners Club
Join Date: Oct 2016
Location: Monadnock Region of New Hampshire
Posts: 1,519
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Quote:
Originally Posted by Gary RVRoamer
...There is no accepted color standard for DC circuits, so always use your meter to determine what is what.
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In theory, black is supposed to be ground in a DC circuit in the US. Europe uses brown. And RVs seem to use whatever they damn'ed well please! So agreed: use that meter, that's what I do.
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My name is Peter, and I'm never going to grow up.
- Winnebago Era 2010 Class B
- Holiday Rambler 2006 Ambassador 40-DFD Class A
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07-25-2017, 07:44 PM
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#9
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Senior Member
Join Date: Jul 2014
Posts: 35,420
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Quote:
Originally Posted by nehog
In theory, black is supposed to be ground in a DC circuit in the US. Europe uses brown. And RVs seem to use whatever they damn'ed well please! So agreed: use that meter, that's what I do.
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Not in trailer wiring. White is ground, blue is brake and black is +. Green & Yellow are R & L turn and brown is tail.
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07-26-2017, 06:39 AM
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#10
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Junior Member
Join Date: Sep 2016
Location: Ontario
Posts: 20
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Again, thank you all. Up until now I only used my meter to tell if there was current or how charged my batteries were. I used the advise and everything was easy after that. Thanks again.
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07-26-2017, 04:57 PM
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#11
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Senior Member
Join Date: Jul 2017
Posts: 164
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If you're color blind, like me, you get very good at reading a multi meter, or as a fall back " Excuse me mam, what color is this?". It's rare to find a color blind woman.
__________________
2000 Damon Ultrasport 3670
DP Cummins 5.9
Tow Dolly, 06 GMC Envoy
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07-26-2017, 06:27 PM
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#12
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Member
Join Date: Jul 2017
Posts: 50
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TPS?
Quote:
Originally Posted by Gibby3398
I'm hooking up a new plug on my dash for my GPS and TPS. My old plug has a yellow white and a white wire. My understanding is the white is always neutral. That would make the Yellow hot. Which is plus and minus? Am I right. I don't want to mix the polarity.
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What do you mean by TPS? Tire Pressure Sensor? Just curious.
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07-27-2017, 05:13 AM
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#13
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Junior Member
Join Date: Sep 2016
Location: Ontario
Posts: 20
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Yes Tire Pressure System.
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07-27-2017, 10:10 AM
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#14
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Member
Join Date: Jul 2017
Posts: 50
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Quote:
Originally Posted by Gibby3398
Yes Tire Pressure System.
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Cool, is it a factory system or something you added later?
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