Interior trailer lighting gremlin .

[huntandjeep]

Glad we could help. We can bill you later for the consult fee.

Bill all you want , collecting might be a problem  . Seriously thanks guys

[Mudman]

On a side note, ALum trlr hitches can pose problems due to lack of grounding as well.  I know personally.

[the1rod]

On a side note, ALum trlr hitches can pose problems due to lack of grounding as well.  I know personally.

If your relying on the hitch to ground your trailer,  your trailer is wired wrong.

[Boss .300 winmag]

Remember.. The power flows out of the negative side of the battery then comes back to the positive side. this is why you always check for good grounds in 12v systems.

Power or current flows from a battery  from positive to negative.  Current is the electricty.  It is electrons that flow from negative to positive.  That being said in any lower voltage system the ground is a big thing.  If it is bad or flakey you will have issues for sure.

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Current is the flow of electrons. Motion, heat, and light are the three types of energy. Opposites attract and since the electrons are negatively charged they move to the positive terminal. The internal workings of the battery sets up a deficit of electrons on the positive side and excess on the negative side causing pressure, thus inducing the flow (Current). The only time this doesn't happen is when a separate power source exerts a greater pressure i.e. a car alternator. The alternator through chemical reactions resets the imbalance.

You a science teacher, scientist, electrician, or electrical engineer

[Cougartail]

Remember.. The power flows out of the negative side of the battery then comes back to the positive side. this is why you always check for good grounds in 12v systems.

Power or current flows from a battery  from positive to negative.  Current is the electricty.  It is electrons that flow from negative to positive.  That being said in any lower voltage system the ground is a big thing.  If it is bad or flakey you will have issues for sure.

Sent from my SM-N976V using Tapatalk

Current is the flow of electrons. Motion, heat, and light are the three types of energy. Opposites attract and since the electrons are negatively charged they move to the positive terminal. The internal workings of the battery sets up a deficit of electrons on the positive side and excess on the negative side causing pressure, thus inducing the flow (Current). The only time this doesn't happen is when a separate power source exerts a greater pressure i.e. a car alternator. The alternator through chemical reactions resets the imbalance.

You a science teacher, scientist, electrician, or electrical engineer

Electrician, who works with an electrical engineer at a scientific research company.  lol

[Stein]

Trailer lights are the worst.  Most of the time, it saves time and frustration to just replace stuff.  As was noted, common failure points are the connection at the truck, the connection at the trailer, grounding on the trailer and any splices on the trailer.  Often, you cannot see splices and they corrode and then you are dark.  I usually start at the trailer/vehicle connection as and work my way to the light.  If I can't find it in 15 minutes I start yanking stuff out and throwing it away.

[Mudman]

On a side note, ALum trlr hitches can pose problems due to lack of grounding as well.  I know personally.

If your relying on the hitch to ground your trailer,  your trailer is wired wrong.

Not always, thus my point.  Depends on how its wired/grounded.

[Mudman]

Cougar, great lesson, well said!  Most people don't know this.  Also the ol garden hose water flow helps too.

[getreal711]

Lots of good learning.  Glad we were able to resolve the issue.