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Squier James Johnson Jazz - rattle on my rod!?

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My JJ Jazz has developed a rattling neck. It hasn’t been dropped or knocked I haven’t adjusted the truss rod and i’ve checked and tightened any machine head screws etc. I acquired this bass used about 4 yrs     as a backup so doesn’t get used a lot. Problem has only reared it’s head in last couple of months. Any ideas? Anyone else experienced this? 

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If you haven't already, then have a check of the truss rod nut. It may have worked loose.

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6 minutes ago, hooky_lowdown said:

Also check if the one of the machine heads isn't loose and is the cause of the rattling noise?

It will be this - the cv machineheads were fecking useless...

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Pretty sure it’s not machineheads, only recently checked and retightened them. I’ll slacken off and re set truss rod. Righty righty lefty loosely? 

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If you have the Allen key in at the headstock and go towards the bass strings, you’ll tighten it. 
go towards treble and you’re loosening it.

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Spot on assessment of rattle coming from machinehead(s). I’ve replaced the 4th string machinehead and it’s done the trick. Tuning pegs would seem to be the Achilles heal of these instruments. Thanks guys!

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