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New Alternator --> Battery Light

savage1987
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savage1987 Contributor

savage1987

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I replaced the alternator on our R33 today because the battery light was coming on at idle.

I installed a Bosch item that was recommended as a replacement. It all fit OK, and it's a 14V 85A unit, compared with the (12V?)80A old one.

The warning light at idle was gone

Mrs drove it to work, it still starts and drives OK, but now whenever the car is OFF the batt warning light comes on, and remains on,

Any ideas??

Thanks,

Sam

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savage1987 Contributor

savage1987

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Aaaaaaaaaand here's the awesome development that has me really hating the car frown.png

Forgot to disconnect battery last night, battery light was still on this morning

Jump started the car..

Didn't sound like it was too happy idling, I hopped in the driver's seat:

Speedo going all over the place, was at 100kph idling, I gave the throttle a tap and it jumped off the top of the scale

Stereo flickering on and off as though there's a short somewhere

that's all i noticed before I turned it off to hopefully avoid doing too much damage to stuff.

I have no idea how to even approach this, which is the really awesome thing.

In other news, when I unplug the 2pin on the back of the alternator (with the car off) the battery light goes away. Internal fault for sure??? What would have happened if SOMEHOW the little conversion plug they give you was wired backwards? At the moment it goes

[sKYLINE HARNESS-------BOSCH ALT]

light green-----------------------black

white----------------------------red

which I don't know but seems weird to me

mr031 Contributor

mr031

Posted
Posted (edited)

I have fitted these before to skylines, and the plug as always been correct. I would check all the fuses 1st, As on the other side off the dash globe should be an ignition to stop this from happening. Im a mobile auto electricain in brisbane if you need help mate.

Edited by mr031
savage1987 Contributor

savage1987

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  • Author
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I have fitted these before to skylines, and the plug as always been correct. I would check all the fuses 1st, As on the other side off the dash globe should be an ignition to stop this from happening. Im a mobile auto electricain in brisbane if you need help mate.

Thanks, I'll check it out.

Your callout fee to Townsville might be huge though. :)

savage1987 Contributor

savage1987

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well it seems the reason the reg is f**ked is because it was the wrong one. Amazing. Thanks very much Bosch :(

getting it back (repaired/replaced) tonight, will throw it in and hope the rest of the system is all ok.. otherwise off to the auto elec tomorrow for further warranty fixes.

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