Issue with fuel pump rewire

[talonDSMerr]

Hi all,

I have something of a weird issue with my fuel pump rewire. I rewired my 255 Walbro several years back and was working great, but one morning, the pump doesn't turn on anymore (using DSMLink).

With the fuel pump turned on from DSMLink, I checked the voltage from my 12v wire going from the battery to the relay and it showed no voltage. I then disconnected the 12v wire from the relay and checked the wire for voltage and my multimeter read 11.8v. Good. I hook the 12v wire back to the relay, but turn OFF the fuel pump via DSMLink, and I have 11.8v. As soon as I turn the pump back ON, the 12v wire has 0.0v. I checked the inline fuse and it is intact, replaced the relay and I get the same result.

I'm not very good at diagnosing electrical gremlins, so some pointers from you gurus would be great

 

[LiquidX]

Is the ground still good?

 

[talonDSMerr]

The ground is good, yes.

 

[talonDSMerr]

I got the problem solved. Using a multimeter, I noticed some strange things happening to the voltage of the 10gauge 12v wire, i.e. had 12v when unhooked, 0v when hooked up to the fuel pump. For whatever reason, there was significant voltage drop somewhere along the wire but not something I could see by looking at it. Got a new 10awg wire in today and sure enough, fuel pump turns on again.