What fuse did you guys use or who know which one stays hot after key is turned?

 

take a wild guess and hope ur right .

If you have a test light it wouldn't take more than 5 minutes to find a fuse suits your needs.

 

Dangit man, im in IL where I can not check but I think I it was the orange wire with red tracer (the power wire for the stock lp). I do not remember getting power from anywhere else for it. I hope this helps.

 

I bent the tab marked 87 on the original fuel pump relay and soldered the air dog trigger wire to it as per the instructions on tst's web page...I run a tst power max and didnt want to damage the cool down timer for the turbo.....worked great air dog is controlled by the ecm instead of running all the time when the key is in the on position and the engine's not running

here is the info from the tst owners pdf I downloaded from the web page....

On a 04-1/2 and 05 Dodge:
DO NOT CONNECT A PUSHER PUMP POWER WIRE TO EITHER FUSE 36 OR 50 or to the “spare” fuse or relay.
Doing so will destroy the circuit board in the POWERMAXCR™ timing harness when the truck is running
during Cool Down. Remove the Fuel Pump Relay. There should be 5 pins. Not all relays are labeled on the
bottom, so use the drawing on the side of the relay to identify the pins. Pin 87 puts power to the transfer
pump. Bend pin 87 out to the side so you can connect a mini female spade terminal and connect it to the
pusher pump power wire. Connect the pusher pump ground to the battery ground.

On a 06 Dodge:
DO NOT CONNECT A PUSHER PUMP POWER WIRE TO EITHER FUSE 28 OR 32 or to the “spare” fuse or relay.
Doing so will destroy the circuit board in the POWERMAXCR™ timing harness when the truck is running
during Cool Down. You will need to use an automotive relay to power the pump. Connect pin 85 of the
relay to ground and connect either fuse 28 or 32 (either orange wire from the POWERMAXCR™ ) to pin 86 of
the relay. Connect pin 30 of the relay to 12V battery and connect pin 87 of the relay to the pump power
wire.