Massey Ferguson 550

Catchpole

New member
Hi everyone

The relay inside the panel is buzzing when i switch the ignition on and continues even when the tractor engine is running anyone any ideas what is causing this problem

Catchpole
 

bczoom

Senior Member
Staff member
Gold Site Supporter
I can think of 2 reasons this would happen.
Low voltage to the relay.
Bad relay.

I'd start by taking a voltmeter to the relay contacts. If it's below about 10 volts, you have a problem getting juice to the relay. It could be a bad contact, corroded wire or something like your battery is going bad or alternator not putting out. Since it's happening before you start the engine (but the engine starts), I'm thinking the battery is good since the engine starts and the alternator is OK since the buzzing occurs before you start the engine. I'd narrow it down to a bad wire/connection to the relay if the voltmeter shows less than 12v. If you do have 12v to the relay, it's probably the relay itself.
 
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