grrrrr help please

[deadeye7916]

ive just read a few threads on my problem but its still not clear what the problem is, just went to take the kiddies to school and went thru the glow plug cycle the turned the key and all i had was a mad clicking noise not just one click but constant clickclickclick,sounds a bit like a relay on a mission to me im totally stuck as i have no idea,my batts are reading bout half way on the meter,but when i turn over that drops to zero then returns to half way when i stop trying, any help would be great thanks in advance..

[Sammyk]

Sounds like classic flat batteries to me.

[wald]

me too classic

[Ambobeer]

or loose terminals

[Surf01]

Possibly the starter motor. Kit to repair it costs under £20

[Eddleston]

I had that, try a jump start, if that works then we know the problem.
If not, yeah, starter.

Then, if you have abused in mud for some time, the alternator may need some love later down the line.