Changed my 12V Power Port

[TexasHD]

Moved the F91 20 amp fuse to the F90 position in the fuse block. Changes the power port from direct battery power to switched on and off with the ignition. That’s all.

 

[RKCRLR]

Is there a way to change the 7 pin trailer connector to switched power?

 

[H3LZSN1P3R]

Is there a way to change the 7 pin trailer connector to switched power?

No not without a relay added to the system

 

[RKCRLR]

No not without a relay added to the system

I'll probably pull the fuse and use a jumper wire from one of my auxiliary switches or perhaps find a switched power source and use an in-line fuse.

It's sort of strange they do it this way, I think a majority of people with trailers and campers would prefer not to risk running down the truck's battery when the engine is off vs having power full time.

 

[H3LZSN1P3R]

I'll probably pull the fuse and use a jumper wire from one of my auxiliary switches or perhaps find a switched power source and use an in-line fuse.

It's sort of strange they do it this way, I think a majority of people with trailers and campers would prefer not to risk running down the truck's battery when the engine is off vs having power full time.

Why would you run the trucks battery down unless you are keeping the truck hooked up overnight with the furnace and everything else left on in that case you should just unplug the 7pin….. I prefer mine hooked up direct to battery so I can plug my trailer in to my house or generator and keep the truck charged up..


Plus myself and other members have started doing what I do and setup a battery maintainer that plugs into the 7 pin for quickly connecting the maintainer.

 

[RKCRLR]

Why would you run the trucks battery down unless you are keeping the truck hooked up overnight with the furnace and everything else left on in that case you should just unplug the 7pin….. I prefer mine hooked up direct to battery so I can plug my trailer in to my house or generator and keep the truck charged up..

I have a truck camper that most of the time stays on the bed when I camp. So if I use the plug in the bed it won't be accessible. I can use the plug at the bumper but I'll still have to get underneath to unplug it. And I have to remember. It is just more convenient for me to have an ignition switched source but perhaps it isn't for other people.

 

[H3LZSN1P3R]

I have a truck camper that most of the time stays on the bed when I camp. So if I use the plug in the bed it won't be accessible. I can use the plug at the bumper but I'll still have to get underneath to unplug it. And I have to remember. It is just more convenient for me to have an ignition switched source but perhaps it isn't for other people.

Well then the relay or disconnect switch would be the next best.

 

[RKCRLR]

Well then the relay or disconnect switch would be the next best.

I have a relay on my current truck that I could install on the Ram but it seems using one of the auxiliary switches would be cleaner. Is there a reason I wouldn't want to do this?

 

[H3LZSN1P3R]

I have a relay on my current truck that I could install on the Ram but it seems using one of the auxiliary switches would be cleaner. Is there a reason I wouldn't want to do this?

Redundancy If I am modifying something I will typically minimize the user input as to limit the chance of forgetting to do something thats all.

 

[RKCRLR]

Redundancy If I am modifying something I will typically minimize the user input as to limit the chance of forgetting to do something thats all.

But I can program the individual auxiliary switch output to only be on when the ignition is on, correct? That would also allow me to keep power to the camper by changing the setting if I wanted to for some reason.

 

[AH64ID]

The cleanest would be to install a voltage sensing relay inside the camper, that way the disconnect is specific to the camper so you can use the 7 pin live for other reasons and you don’t have to cut into the OEM wiring.

Amazon.com

But I can program the individual auxiliary switch output to only be on when the ignition is on, correct?

Yes.

 

[RKCRLR]

The cleanest would be to install a voltage sensing relay inside the camper, that way the disconnect is specific to the camper so you can use the 7 pin live for other reasons and you don’t have to cut into the OEM wiring.

Amazon.com

Yes.

I wouldn't cut into the OEM wiring. I'd remove the 30 amp fuse for the trailer power and run a wire from the auxiliary switch terminal (protected by a 30 amp fuse) using a spade terminal to plug into the receptacle where the fuse leg was.

 

[wrvond]

Have you verified there is actually power to the plug when the truck is off?

Why would you run the trucks battery down unless you are keeping the truck hooked up overnight with the furnace and everything else left on in that case you should just unplug the 7pin….. I prefer mine hooked up direct to battery so I can plug my trailer in to my house or generator and keep the truck charged up..


Plus myself and other members have started doing what I do and setup a battery maintainer that plugs into the 7 pin for quickly connecting the maintainer.

Are you saying the 12 VDC pin at the RV plug is bi-directional and can supply battery charging power to the truck? My camper has solar (as well as shore power), and being able to trickle charge the truck from the camper could come in handy some day.

 

[H3LZSN1P3R]

Have you verified there is actually power to the plug when the truck is off?

Are you saying the 12 VDC pin at the RV plug is bi-directional and can supply battery charging power to the truck? My camper has solar (as well as shore power), and being able to trickle charge the truck from the camper could come in handy some day.

Yes it does not have a diode to stop reverse flow of current