|
That link provided by Brenkco talks about a 12v pump system which would be fine for a truck. I'm guessing (hoping) your 9v reference is a typo otherwise you now have to transform a 9v to the truck's 12v system which would complicate things.
If you use the pump like what's shown in the link, you'd just need to set up a connection to the truck (battery). One way is to cut off the clips and buy another 7 pin adapter and plug these wires into the proper hot and ground (aka return) of the connector. This would then plug right into the 7 pin connector on your truck.
The 4 pin trailer connector wouldn't provide these as easy since it only provides the left/brake, right/brake, running and ground (no HOT).
The pump would then need to be close to the 7 pin connector unless you add extra wire. I would also consider running the engine while using the pump so you don't run down the battery.
I hope I'm addressing what you are trying to do here.
|