87 nissan pathfinder head lights

Was it running before you changed the pump just with low power or are you saying it was running low on voltage?
There are only 2 wires on the pump the black of ground wire gets grounded on the left side of the trunk, the other wire goes to the fuel pump relay in the under hood fuse block along with the pump fuse. Is the pump good? If you pull the fuel pump relay and jumper #30 to terminal #87 in the fuel pump relay connector the pump should run (make sure there's voltage in #30) find the fuel rail test port and remove the plastic cover with the relay connector jumpered push the schreader valve and fuel should spray out. If not and you hear the pump run look for a pinched line or a bad fuel filter which I hope you already changed. I hope this helps. Take care. I know it's late but I'll be around for a bit if you have more questions for me use comment or whatever.

There are 2 relays under hood ,one on tricers side relay box and the other on passangers side next to battery. and a fuel pump fuse inside under steering column

Did you check your fuel lines for breaks or kinks? Any electrical harness under there where hit? Like a fuel pump connector?
You might want to test fuel pressure at the test port on the fuel rail.

It could be your fuel injectors that are clogged up. Get them cleaned and it should start. Hope this helps, James Booth

inside the engine under the oil pan

early electronic ignition model i think if my oldtimers memory is correct ,try changing the ignition module ,i think it either under the coil or inside the distributor

fuel pump fuel filter

have you check the ground on that side of the light. it could be not properly grounded.
if there is no good ground, what would happen is that one bulb would become a ground for the other to light low where as the other one would not light anymore.

tnx again 4 using fixya,

drcool

check your fuel lines, from the pump to the filter. any part could be a problem.

tnx 4 using fixya.

drcool

if you ran out of fuel it may have blown the fuel pump fuse. put gas in tank. replace fuel pump fuse and cycle the key on but not to the start position, you should hear a buzzing noise which is your fuel pump when the buzzing stops turn ignition off and do it again. repeat a bout 5-10 times and it should start after that.