12 volt pump to seven pin

[Byrogie]

I have a portable water tank with a 12 volt pump that I want to wire to a seven pin connector so I can plug it in to the truck to operate.
Does anybody know which pins to use? Tried using the white and black, but have to turn ignition on for it to work.
Want it to work with ignition off.
2008 F250 Deisel

thx

[Byrogie]

Thanks all for your input.

[Lenny_K]

Byrogie wrote:

Lenny K wrote:

Byrogie wrote:

Lenny K wrote:
You could always put a female end to your water pump and use the trailer seven pin connector. You always have constant on power at the trailer.

The whole idea is convenience. If I need to put the truck close enough to reach the trailer connector, then I can use the alligator clips directly to the trailer battery.

I put a 15 ft cord onto to my water pump which I can disconnect and use on my macerator. I also put connects on the end so I can either use a female or male plug. It's all about "convenience".

Duh! I use a macerator as well, hook up to an old battery with clips.
So can I make a cord to hook up to the trailer umbilical and can use for both?.

You sure can and I do all the time. I use 2 pin diconnects which work very well for this application.

[Byrogie]

Lenny K wrote:

Byrogie wrote:

Lenny K wrote:
You could always put a female end to your water pump and use the trailer seven pin connector. You always have constant on power at the trailer.

The whole idea is convenience. If I need to put the truck close enough to reach the trailer connector, then I can use the alligator clips directly to the trailer battery.

I put a 15 ft cord onto to my water pump which I can disconnect and use on my macerator. I also put connects on the end so I can either use a female or male plug. It's all about "convenience".

Duh! I use a macerator as well, hook up to an old battery with clips.
So can I make a cord to hook up to the trailer umbilical and can use for both?.

[Hondavalk]

I just rewired my center pin on my 7 pin connector to be always hot.

[Lenny_K]

Byrogie wrote:

Lenny K wrote:
You could always put a female end to your water pump and use the trailer seven pin connector. You always have constant on power at the trailer.

The whole idea is convenience. If I need to put the truck close enough to reach the trailer connector, then I can use the alligator clips directly to the trailer battery.

I put a 15 ft cord onto to my water pump which I can disconnect and use on my macerator. I also put connects on the end so I can either use a female or male plug. It's all about "convenience".

[Pipeman]

You could always get ;thisI use one with my 2 collapsible water tanks. Works great. You can get one from Amazon.com for $20.

[Byrogie]

Lenny K wrote:
You could always put a female end to your water pump and use the trailer seven pin connector. You always have constant on power at the trailer.

The whole idea is convenience. If I need to put the truck close enough to reach the trailer connector, then I can use the alligator clips directly to the trailer battery.

[Itinerant1]

Voltmeter won't do nothing more give you something to read while its supplying power. It's has power for x amount of minutes or untill you open the door with the key off. I guess a saftey feature from killing the battery. Same goes for the interior lights if you leave them on by accident the power will be turned off in x amount of minutes.
If he wants contant power he'll have to wire it from the battery.

[2oldman]

Voltmeter.

[Itinerant1]

Correct about the Ford power relay. Just use your parking lights switch you don't need the key on for it but will have to wire it to the running light connector.

[Lenny_K]

You could always put a female end to your water pump and use the trailer seven pin connector. You always have constant on power at the trailer.

[Byrogie]

Well, I am using a seven pin because I have one laying around, and the connection is in the box which is handy.
According to the diagram above, I should be able to do positive(red) to black and negative(black) to white, yes/no?
This is what I did but it won't work unless the ignition is on??
Is it because it's a Ford? The neighbor's works on his Chevy....

[GordonThree]

Byrogie wrote:
I have a portable water tank with a 12 volt pump that I want to wire to a seven pin connector so I can plug it in to the truck to operate.
Does anybody know which pins to use? Tried using the white and black, but have to turn ignition on for it to work.
Want it to work with ignition off.
2008 F250 Deisel

thx

You have it wired correctly, but your truck has a disconnect installed that shuts off trailer power when the ignition is off.

Perhaps a Ford guru can speak to any possibility of bypassing the disconnect.

[Itinerant1]

I used the 4 pin connector instead of the 7pin



This is mine. When using it I just turn the parking lights on turn lights off when finished.