Battery overcharging problem


My battery is boiling of water fairly rapid like, charging volts is 14.6 which seems a tad high, any advice Unknw
1995 2.8 TDi Fourtrack/Rugger

You will need a new alternato

You will need a new alternator. 13.8Vdc should be the nominal charging voltage, and the regulator within it has packed in. Nowadays these are enclosed in the alternator itself - it used to be possible to change them on Lucas units, but these look fairly well sealed.

To save destroying your battery while you get a new alt., give the battery a bit of a heavy load (i.e HRW) when in use to soak up some excess current.

Dave with a Sporty

Dave with a Sporty

Dave,Whats the black box on t

Dave,Whats the black box on the inner r/h wing, looks like a old style regulator, can it be adjusted Unknw

Thats your regulator, check t

Thats your regulator, check that first. The Sportraks have a different charging system, with internal regulators.
Growing old is compulsary, growing up isnt, and

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All views and advice offered are my own, from my ow

That's definatly the bit. Ha

That's definatly the bit. Had this problem with nearly every old deisle Daihats I've ever had. It's a big heavy old lump. It can be replaced by a much more hardy sealed solid state Toyota module. Unfortunatly I can't remember which Toyota it comes from.

Any veiws expresed in this thread by me are purely from my own experience, and (sometimes) falible memory. Hope my comments help, but please don't take them as gospel.


Had the same problem on my wifes 1984 F75 and bought another regulator from the local wreckers for a few dollars and solved the problem. It has a black box etc on the left hand inner guard. The newer models may be different but I doubt Daihatsu have changed this.


yeah - i noticed i have to to top my battery up more often than i ought to but this only equates to about once every three months, which i can live with (havnt checked the voltage at the terminals though)

mines a 1999 tdx with 50k miles