Worzey
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| posted on 13/4/08 at 12:48 PM |
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Dead Alternator?
Numpty question time (electrics aren't a strong point).
I reported last week that my Rev counter was beating in time with indicators.
On a trip out yesterday the whole car died and wouldn't restart. After a tow home I put the spare battery on and it started first time so I
assume the battery isn't wasn't charging as its a brand new Odyssey PC545.
Have checked the spare battery I have 12v across the terminals, but when the engine is running and with a few revs I expected this to rise to 13v-14V
when the alternator kicked in?
It actually drops to 11.5v so I'm assuming the alternator is dead? The battery light wasn't on on the dashboard which is strange so could
it be the regulator thats gone?
Caterham R400
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HAL 1
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| posted on 13/4/08 at 12:58 PM |
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was it a washout today ? might be going with a mates hybrid, TVR/ LOTUS
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HAL 1
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| posted on 13/4/08 at 12:59 PM |
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wrong thread
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jollygreengiant
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| posted on 13/4/08 at 01:10 PM |
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Yep sounds like alternator has gone to meet its maker, pushed up the daisies, joined the bleedin choir of jesabel. its ******* snuffed it, If it hadnt
been bolted to the engine it would have fallen off weeks ago.
Oh sorry a bit of Monty P slipped in their.
Yes an alternator should produce about 13v (+/_ 1V) when the engine is revved. It should also maintain the voltage with ALL your lights, hazards,
heaters etc switched on at the same time.
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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02GF74
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| posted on 13/4/08 at 01:25 PM |
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lovely plumage.
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Worzey
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| posted on 13/4/08 at 01:53 PM |
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Cheers! I thought it might be stunned or maybe pining for the fjords but its sounds like its an ex alternator. Oh bum!
"VOOM"?!? Mate, this alternator wouldn't "voom" if you put four million volts through it! 'E's
bleedin' demised!
This could be expensive 
Caterham R400
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Worzey
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| posted on 13/4/08 at 01:58 PM |
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Can anyone tell me if the alternator for the 20v 4AGE is the same as for the 16v 4AGE or if I have any alternative lightweight options that fit the
existing mountings?
Caterham R400
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britishtrident
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| posted on 13/4/08 at 02:07 PM |
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Sounds like the original cause was a bad earth or arcing connection --- either will kill an alternator.
Check all the connections & earth points very carefully especially the connections at the alternator itself.
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Litemoth
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| posted on 13/4/08 at 04:09 PM |
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Had a similar issue with my 4A-GE. Turned out that the B+ connection was touching the steering column when the engine was tensing on it's
mounts. It had blown a fuse but of course no light on dashboard because the alternator was still functioning, just not connected to the battery any
longer.
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Dusty
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| posted on 13/4/08 at 06:59 PM |
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If you get no ignition light when switching on it may be a blown bulb. Depending on what alternator you are using you should first check it's
ignition light circuit and or it's switched live supply. Most alternators have one or both of these and need this excitatory current to be able
to produce lectric.
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