fuel pump relay

[krowey]

just got boat all pulled out, cleaned, engine serviced & drive re-installed. fired her up on muffs & everything is all okay. went out over the weekend & believe i lost the fuel pump or relay. i have started trouble shooting by checking power at the fuel pump plug & get current there with my light tester, pump still does not run. i am going to purchase a volt meter tomorrow for more accurate testing. i have also tried jumping terminals 30 & 87 with jumper wires & all it does is kick the circuit breaker. i took pump off & it seems to run fine on the bench. any more ideas? i have check most all the connections for corrosion & cleaned up a few, all looks good. the engine & drive are the joint omc/volvo effort. model # 502bpbyc.....serial # t01309929.....year 1998. i have a manual for the boat, but the previous owner, didn't take very good care of it, so its difficult to read. i would really like to figure this out on my own, with a little help from you guys. any help would greatly be appreciated. i have searched the threads looking for a schematic & trouble shooting, have found some close, but not the exact same as my engine has. thank you all.

 

[bruceb58]

jumping 30 and 87 should definitely operate the pump.

This have fuel injection or carb?

 

[krowey]

Sorry, forgot to mention, it's a carburated 5.0, yeah when I jumped 30 & 87 it trips the circuit breaker.

 

[bruceb58]

unplug the pump and try it. If it still blows the breaker, you have a short to ground.

 

[bruceb58]

This is a good diagram of what your circuit is like. Make sure you are jumpering the correct connections.

 

[krowey]

Thank you for the diagram bruce, that's a much better image, than what's in my old moldy manual. Your right it looks like I was jumping to the wrong terminal & causing the breaker to trip.