Jump to content
Sign in to follow this  
Andrew Chua

Td5 Alternator

Recommended Posts

Hi all,

Recently I seem to have problems starting my landie. I seem to end up with a flat battery after parking for 2 days. Yes, something somewhere is draining the battery. I'll have to find it an nail it soon or just have to start the landie every 12hrs.

My question is, what's the output voltage of the Td5 alternator. When i start it up, it's say 14.2v and as I drive i get 13.8v after about 40min of driving. When I put on the main lights and stuff, I get as low as 13.6v.

Is this normal or is it supposed to chuck out 14.1v all the time?

The battery is a 2mth old optima yellow top. 55Ah rating.

Thanks!

Andrew

Share this post


Link to post
Share on other sites

try disconnecting the earth lead off the battery when parked up.

if its ok when you do that then it is probably the diodes in the alternator have packed in allowing the current from the battery to energise the alternator thus flatten the battery when parked up.

if it still dose it with the earth lead off the battery disconnected when parked up then its you battery that is duff

Share this post


Link to post
Share on other sites

I'd expect around 14-14.1v when running at say 2500rpm.

At idle the alternator isnt spinning fast enough to deliver its maximum output, hence the voltage will drop when you turn lots of electrical load on, it should recover if you bring the revs up, if it doesnt, then theres something wrong with alternator or the wiring somewhere.

What you need to do is connect an ammeter between the positive terminal and the positive lead, with the ignition off, and see if theres any noticable draw. If there is you can start pulling fuses until it drops to try and identify the circuit causing the drain.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...

Important Information

We use cookies to ensure you get the best experience. By using our website you agree to our Cookie Policy