auto electrical advice wanted

Not fishing related but need some independent advice on auto electrics.  I have a 2005 hyundai terrecan.  We are having issues with the battery not charging properly.  The battery and the alternator have been checked by the battery people as the battery is still under warrenty.  They say both are ok and there is a problem getting charge from the alternator to the battery.  We had a junior mechanic experienced with hyundais service the car today (private cashy job - he is still an apprentice and about to qualify as a mechanic) .  He is not confident with auto electrical stuff.  He run a test and believes the harness has burnt out.  The test results are...

 

Volts 12.4

Measured 401 cca

Rating 540 cca

Battery type regular flooded

Battery location in vehicle

Cranking 10.08v

Time 0.84s

Low output

No load 13.42v

Loaded 12.48v

 

Is there an auto electrician out there that can provide some independent advice on my info to date and an indication as to how much it will cost to fix???

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scano's picture

Posts: 1247

Date Joined: 31/05/07

You mentioned battery in car?

Sun, 2014-02-09 04:54

 As in inside the rear cargo area or something?

 

if so it sounds like bolt drop to me. Often bought about by wiring to and from the battery to the starter motor not being of sufficient size. The wiring either gets too hot and too much resistance or a lot of the time the earth wiring in particular from the battery to the body or even from the body to the engine has a poor connection.

 

if you do some googling you can get the info on how to check the resistance of the wiring at the end of each connection point. Hope this somewhat helps

 

scano

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Posts: 6454

Date Joined: 08/08/11

 Its just the standard car

Sun, 2014-02-09 07:53

 Its just the standard car battery in the engine bay.  It's not a second battery.

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iana's picture

Posts: 652

Date Joined: 21/09/09

Have a read

Sun, 2014-02-09 06:31

Posts: 6454

Date Joined: 08/08/11

 Cheers!

Sun, 2014-02-09 07:59

 Cheers!

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Terry's picture

Posts: 458

Date Joined: 04/12/05

regulator

Sun, 2014-02-09 07:03

if it's not charging properly then maybe it's the regulator. If you get this checked out at least it eliminates one area of cause.
12.4v under load indicates that the altenator is working but 10v cranking could be a bit low and indicate a bugged battery.

Posts: 6454

Date Joined: 08/08/11

 Battery is still under

Sun, 2014-02-09 08:01

 Battery is still under warranty and been checked.  Battery people wont replace it as it is ok.

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Posts: 358

Date Joined: 12/05/12

Try another

Sun, 2014-02-09 08:39

 Try another battery and see what test figures you get...terminals on right sometimes the look alright but are not making as good connection as appears...had this happen on my troopy...

kempy's picture

Posts: 810

Date Joined: 28/05/09

10v cranking is fine as long

Sun, 2014-02-09 09:17

10v cranking is fine as long as it doesnt drop below 9.5v. Run a lead straight from the alternator to the battery to see if it improves. Like a said in the PM I have seen terracans burn up the main alternator lead. Give us a call if you want it looked at.

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Open 7 days except when we are fishn For all your auto electrical needs

Posts: 6454

Date Joined: 08/08/11

 Hi kempy.  Will send another

Sun, 2014-02-09 12:30

 Hi kempy.  Will send another pm. Cheers

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