Relay issue making buzzing noise

[bartyb]

This is for a 91 240sx with the stock DOHC.

The tail lights fuse kept on blowing, so I checked all the wiring going to the rear lights, all bulbs, all fuses, removed all the audio wiring left by the previous owner. The car alarm remains but it seems to be properly connected.



Yet once the car starts, a buzzing noise is emmited from this blue relay, which is positioned behind the wiring harness on the driver's side (just above the fuebox)



Ignore the red dot, the blue relay is behind the harness on the bottom part of it, near a brown relay.

I am not sure what is his purpose, I'm guessing something to do with the VSS as once disconnected I have no speed indication. I changed it with another one I had in spare (without knowing for sure it is in working order as it came form a parts car), but it still makes this buzzing noise. Now Before I go and buy a new one from Nissan, is there a way to check if this is the problem, or what can be causing this relay to buzz like so? Once the relay opened, it looks ok, but I'm no electronics expert .

Also, the front side markers (orange) an the front white lights below the orange ones (DTRL Are they called?) are no longer working. I rechecked all fuses, nothing is blown now. There is another fusebox below the airbox that I didn't check yet though.

Any help in resolving this mess would be greatly appreicated.

[sean58888]

ah i think you might have soem cut wire touching the metal or chassis.check the driver side fender well and around the clutch and brake pedal see any wire cut or exposed.