Hi, I have a 1988 Ford escort xr3i cabriolet. When I bought it the fuel relay was bypassed so pump on all the time, it works but I'd like to get it fixed.

When I looked at the relay holder a couple of the wires were disconnected and joined together. I've put the relay holder wiring back to how it should be, got a new relay and put it in. It operates as it should, primes, stops and runs engine when started but it makes a loud buzzing. I got another relay, this time a black aftermarket one new, does the same.

I suspect there is a problem with one of the feeds to the relay. Before I start looking further at it, does anyone here know exactly what this is?

Youtube video of relay buzzing: https://youtu.be/XGdpIjstfvM

Any help appreciated before I start pulling everything apart.

Note, fuel pump is working fine. Engine runs fine even with the buzzing.