tank switch is not working

This vehicle is still new and information for repairs are not found in our database so we might not be able to assist you.

REsetting the battery is not going to work if you have a wiring or power supply problem.

I am not sure what problem you are facing and you need to provide more details for me to understand the problem and see if I am of any help.

thanks a lot for reply my frend.
actually i install one device in this vehicle
before installation this sub tank is working
but after finish installation sub tank is not working
i don't know what i do now............?

What device did you install and does removing it make the sub tank work again?

Did you check for blown fuses?
Is the device you installed connected to the subtank wiring?

this device is security system device
i remove this device but problem is same
fuse is ok
not connect to device wiring with subtank

You need to start with the basics.

Get a DVOM to test the power supply and ground circuit of the sub tank, from switch to fuelpump.

how i check the sub tank wiring
because i don't have sub tank wiring diagram
that's why i don't know what is in put and out put of sub tank switch.....

I don't have the wiring as well but you can't miss it. Power supply to the fuel pump would be a colered wire that is bigger than others, maybe another groud wire would be of similar size.