Hi Giancarlo

I'm rewriting your request so it is more clear to others.   Please post back
if I've interpreted you incorrectly

Tempra 1.9TD Problems

1)  Battery light sometimes turns on and suddenly off again

This sounds like a connection fault or the alternator brushes are worn.  The
alternator has two wires (main charge and sense wire) going into it.  The
main charge wire is bolt connected.  The sense wire is the thin 'spade'
connected wire.  These often get dirty or corroded and will cause your sort
of problem.  If this connection is OK then it could be the brushes worn.

2) Resistance Light ( injector heater light?) blinks when travelling over
120 km/h

3) Windshield (I presume wipers as the Tempra never had a heated windscreen)
wipers sometime fail.  Possible relay problem.

Set the wipers to intermittant.  You should be able to locate by click sound
and feel (finger on relays) the relay that drives the motor.  Locate it and
remember how to quickly locate it agian.  Next time the wipers fail see if
the realy is still operating.  The wiper motor has an internal switch
mechanism for parking the wipers.  If these contacts or operating levers are
dirty/or faulty then the wiper will not correctly function.

Nick /////