Fuel pump not working !?

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Mazon1x

Junior Member
Joined
May 19, 2021
Posts
26
Reaction score
2
Location
Virginia
Ram Year
1990
Engine
5.9 gas
Took the gas tank off and replaced fuel lines . Finally got everything back on . But fuel.pump isn't working replaced fuel pump and asd relay and still nothing . I have 4 lines blue/yellow strop and green black and 2 other wires can't remember the color . But blue/yellow has power but nothing else has power. Not sure if there is supposed to be 2 powers and 2 grounds or 3 grounds and 1 power . Any help would.be amazing!
 

crazzywolfie

Senior Member
Joined
Apr 6, 2013
Posts
16,431
Reaction score
3,192
Location
under the truck
Ram Year
81 93
Engine
5.2
Have you checked for power at the and relay? You will usually only see power at the fuel pump wire for about 2 seconds if the computer is working like it should. It is just enough to prime the fuel system. Then the computer is waiting for the engine to crank before turning the asd relay on again.
 
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