Lift Pump not working

[RollinCoal]

Use a "computer safe" test light (computer safe has a little pc board and LED lights) unplug the lift pump use the diagram above have the test light in the hot side and turn key on, it should light up for 30 sec.
then swap clip the light on hot side of alt and test the ground
If it all works and lights up replace the pump, those pumps are pretty good but I have had to replace a few, usally on higher mileage trucks