Electical problem

Richy-2011 · May 20, 2011

Hi i have a 300 tdi when its first started all the electrics work fine lights windsceen wipers demisting fans etc after a run out it starts to flaten the battry or so i think ie you carnt use stereo and lights at same time or indecators etc witch does pose a problem on rainy dark nights lol
I have been told it isnt the alternator because the car starts even wen its been stood for a week any help or advice
Thanks in advance
Rich

robint · May 20, 2011

check your earths , take them off clean them up re-connect them

Richy-2011 · May 20, 2011

robint said:
check your earths , take them off clean them up re-connect them

this might sound like a daft question but were r the earths (defender 90):doh::doh::doh:

Station House · May 20, 2011

As above - always check your earths first.

Would also start with the battery terminals!

An odd one, as it would usually not start. Getting worse once running is just odd - does feel like a loose connection.

Also well worth putting a voltmeter across your battery - should be around 12 - 12.6v without the engine running, 13.5 - 14.5 volts with the engine turning over.

Take it the red ignition light is working, and isn't coming on/flickering when driving/turning on lights etc? If yes, could point to a failing diode in the alternator

Richy-2011 · May 20, 2011

Station House said:
As above - always check your earths first.

Would also start with the battery terminals!

An odd one, as it would usually not start. Getting worse once running is just odd - does feel like a loose connection.

Also well worth putting a voltmeter across your battery - should be around 12 - 12.6v without the engine running, 13.5 - 14.5 volts with the engine turning over.

Take it the red ignition light is working, and isn't coming on/flickering when driving/turning on lights etc? If yes, could point to a failing diode in the alternator

hi mate yes wen you have been for a run some times the ignition lights do flicker if battrey is under load ie indecator on as well as sum thing else:doh:

Station House · May 20, 2011

OK.

Should be able to find someone local to run a quick alternator check - usually free and takes less than 5 mins

Don't really understand the why, but suspect alternator circuit breaking down as it gets warmer from use.

Could also be slipping fan belt under load, but think you'd hear that, even over the noise of the engine

Richy-2011 · May 20, 2011

Station House said:
OK.

Should be able to find someone local to run a quick alternator check - usually free and takes less than 5 mins

Don't really understand the why, but suspect alternator circuit breaking down as it gets warmer from use.

Could also be slipping fan belt under load, but think you'd hear that, even over the noise of the engine

cheers for the advice will get the altonator checked

rappy1 · May 20, 2011

There is an earth for the wiring loom that mounts in the area of the clutch master cylinder Ii noticed when i was putting my dash back together and this was disconnected the interior fan and other electronics would not run however the fuel pump worked fine. It might be worth checking that earth too.

bluehaze · May 21, 2011

Have the battery checked out.

Also has the alternator been checked with a volt meter?

Electical problem

Richy-2011

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robint

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Richy-2011

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Station House

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Richy-2011

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Station House

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Richy-2011

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rappy1

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bluehaze

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