air filter and charge light stays on after start- landcruiser hj 75

jump on lcool.org and you most probally will get the answer you need, pull out the glove box as there are some electricial bits behind it, most probally a relay or something "buzzing" due to charge rate increasing at 1200rpm and low at idle...
Cheers

how long has it been since the alternator has been
reconditioned . check it with a volt meter on the battery
mechpete

Sounds like the charge rate is to low at idle. Increase in revs increaes alternator output. Filter light will come on due to shared earth circuits in the dash.
Check charge rate if you have an accurate volt meter, should be no less than 13.2volts.
Hope this helps.
Dan

The glowplug timer lives behind the glovebox, and it should certainly not buzz.
A faint "clunk" when it drops out is all you should hear.

If this is the 2h engine (hj75) the timer also has the low oil pressure cut out in there.
As suggested sounds more like an alternator problem but if you are lucky could also be a faulty earth, engine block to the battery negative.

What is showing on the voltmeter with the engine running? A few checks with a multimeter will help isolate the problem.
mike

Voltage regulator.