Rahul Si

Hello everyone,any experience on 3 phase low pressure fuel pumps....
Initially car was hard starting, techie checked in tester & found no pressure in fuel line, so fuel pumps were considered bad, upon removing we found that yes filter was in bad condition, pump wires were not in good shape, feels as they were burning. So we ordered everything new, including wiring. .. but it didn't work.
how to operate 3 phase pumps manually.. I don't know how to check them... Pumps never work & engine just cranks, ....
Any idea how much voltage I should expect at pins to pump,?
Someone tried to swap the 3 phase wires as well, is it ok to swap them with each other ???
Fault I read is " the output to pump is short to ground"... ?
I am having mechanical engineering background & don't know much about these kind of pumps, will be really happy if i can get any help from this forum.
Thank you for your tme