cavalier 1.7TD 94 model

Could anyone from this ng help with following problem, Brake level and
charging lights are on when car is running. Charging is ok, brake
level also. Other question is that where I can find K76 relay from
this car, haynes manual don't say it. Thanks for your help.

 

I would say that the alternator is failing. Get it tested by a
competeant autoelectrician.
Dave

 

well I have checked the voltage when car is running and it is arounfd
14 volts, so altenator should be ok

 

does it go higher than this when revved to say 3K?
then it still could be.

mike

 

ok , I have to try but earlier owner has bought new battery and
alternator because of this problem a month a ago without any help.

 

Bit of a guess but I'd check that any grounding straps/ wires between
the engine, bodywork, alternator and battery are clean.

 

If the altenator gives a steady reading of 14.4V plus minus a bit, saya
1V or so, it should be OK. Check it under load ie headlamps and rear
screen heater and rev the engine up to about 3000 rpm.
If that checks out OK, then as airsmoothed says check the engine
earthing straps. The gearbox one in particular. It gets left off after a
clutch change.
If they are all OK then you'll need to take out the speedometer and
associated circuit board and check for damage, like a short circuit,
open circuit, damaged circuit board copper track or a wrongly fitted
warning lamp.
Dave

 

then why didnt you say that in the first place..........

as suggested, earth will be my port of call now.

watch the gearbox one , by now i bet its not even there or the box end has
rusted clean away.

mike

 

sorry to jump in on this thread but i own the same model and when i
accelerate hard the air bag warning light comes on and the revometer jumps
up and down erratically .....any idea's anyone

 

It's a common fault with the altenator on this model. Either a phase has
gone in the altenator, or it is starting to die, either put up with it, or
replace the altenator.

You will probably find your headlights are not quite as bright as they once
where.

 

update
I found the problem, it was that K76 relay whitch, when off, puts
brake level and charging lights to ground and when on to 12v. Other
side is coming from battery (12v) so they are on all the time. It gets
its power from altenator and usually when alternator is progen you
should change this one too.

It was burn out and connected to ground. thats why those two was on
all the time. You can found that relay from drivers side behind kick
panel. there is two relays and some electrical box. this one is the
midlle one.