no power to fuel pump

[quote:4836ebfa1f="mhdavis"]i have an 87 gmc sierra with dual fuel tanks, there is no power going to the fuel pumps and i traced the wires all the way till it goes into the fire wall and there is no juice going through them. they will work every once in a while and stay working untill the truck hassnt been ran in a few hours. fuel pumps themselves still work fine. all fuses are good. i need help[/quote:4836ebfa1f]

Does it start after a long crank
If so check fuel pump relay
And its circuits
Good luck