Alternator???

[DaddyA]

Hi all,

this is a carryover from my engine thread so apologise all round.

Just to refresh, my battery charging light didn't work, consequently my alternator wasn't charging!!

Spent hours today with the electrickery and still no further on, I have got the charging lamp to illuminate by taking a switched live to the lamp.

I did get the alternator to charge by supplying the relay with a different supply, however when I switched on the ignition the alt light went out??? Then when i started the engine the fuse blew for the relay??

Am i missing something here?? Not fully conversant with car electrics so any help would be appreciated.

In the end I had to walk away and put everything in my hands down before i caused some damage

Hopefully sort it soon though.

[twinturbo]

check everything is ok with the alternator by simply putting a bulb in-line between +12V on the battery and the charge output post on the alternator

TT

[Enoch]

I had exactly the same problem with mine, I found it was teh bulb holder not making proper contact with the printed circuit of the instrument panel. I cleaned it up and put a dab of solder on to the pads where the contacts of the bulb go and it now works perfectly.
hope that helps,
Enoch

[DaddyA]

Thanks for the replies,

I'm pretty sure its not the bulb, no printed circuit board to deal with.

I'll try the lamp in line, I think its wired wrongly but I'll keep going till something happens!

just to clarify,

large red to battery, one wire to warning lamp fed by 12v switched supply and other one fed from alternative 12v supply?

[twinturbo]

????

Which engine is this from? I know CVH's have 3 terminals.

the two fat red ones go direct to the battery +12V
the small blue one is the charge lamp.

Rule out all other elements of the charge lamp circuit by removing it and replacing it with an inline lamp back to +12V on battery as described.

We can work from there once we have confirmed the alternator is working.

TT

[DaddyA]

Cheers TT,

its 1.8CVH, it did charge briefly so it does work, it just kept blowing fuses.

I've only got one going directly back to the battery, one to the chrging lamp and the other goes via relay - this where I think the problem lies but if that one can go straight to the battery then that should sort it - hopefully.

However, when in that brief moment it was charging, the engine wouldn't stop (it was mentioned I'd need something inline to stop this).

I won't be able to tweak today as we are entertaining but I'll have a look tomorrow and let you know how I get on.