cutting out .4.5 cerb

cutting out .4.5 cerb

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Discussion

stas

Original Poster:

111 posts

260 months

Thursday 17th April 2003
quotequote all
All,
During a run this morning an intermitant problem
started to occur.(As if ignition was being turned off and on)At First it was occasional then became quite frequent until complete failure.
However, when left for a while engine would restart. Once on the move the same pattern would start to occur.
Eventually the battery light came on. So upon my very fustrating return to the pad,(stop/start) I decided to check for Voltage output at battery ,not good.10.2v at tick over,falling as revs were increased.
I Rang Mole Valley and explained the problem and a helpful chap suggested the Altenator fuse located toward the back of the engine may have corroded; apparently a common fault. I checked for this and 'hey bingo'the fuse was badly corroded.
At that momment I put the two terminals together,by-passing the fuse ,restarted engine in order to re-check voltage output. Great,13.4v and rising .So order a new fuse and away to go ..........Nope.
AA have just brought the car back after breaking
down 1/2 mile from the house.(not nice)
This time , battery light did not come on.
has anyone had a simular problem .?

mike_e

588 posts

270 months

Friday 18th April 2003
quotequote all
A voltmeter has a very high impedance so will measure voltages accurately but this doesn't mean that there is any significant current flowing in the circuit.

If the fuse was corroded then perhaps the terminals were also? Did you clean them before replacing the fuse? Was the fuseholder intact? they often melt or break. Did you recharge the battery before taking it for a run? The symtoms you describe certainly point to the charging fuse. Doesn't sound like the alternator since you get a healthy reading when bypassing the fuse.

I've also found the battery light doesn't always seem to work as you'd expect. I had one fuse fail and one come loose, neither time did the battery light come on.

stas

Original Poster:

111 posts

260 months

Friday 18th April 2003
quotequote all
Mike ,
Thanks for the reply. Good points,sometimes
lack of thought and complacentcy get in the way .
Thanks for the input.
Stas.

stas

Original Poster:

111 posts

260 months

Saturday 19th April 2003
quotequote all
All,
cleaned and copper sliped battery connections.
so far no cutting out and going much better.

wokkywokky

36 posts

259 months

Monday 21st April 2003
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I had my cerby for two days and the battery light came on. This was just after I had replaced a sports exhaust that fell off! It was the same little ali strip that corroded and had me scratching my head. Its just a pain to get to.