2003 cummins no start - no power to lift pump
 

Hi guys - I got something I can't find a answer to - my truck stalled - tried to restart no power to starter- changed out blown fuse #20 on fuse panel (run start) - now truck will turn over but not start. No power to lift pump or fuel gauge- pulled box off and jumped lift pump the pump will run jumped- truck will start this way but only run for 5 sec- traced chassis wiring all is good till I get to lift pump relay - relay is changed and working - yellow wire seems to be issue - yellow wire goes over and hooks up behind fuel filter on engine - lost from here on has any one have any ideas - I have tried swapping ECM, ignition switch,test lighted complete chassis wiring, lost for ideas other than pulling wiring loom apart,thanks in advance for any ideas

Check connector inside of drivers side lower rear of front fender. That connector usually has issues due to being exposed to road grime. Just had mine give me issues and that connector for harness was rotted inside.