positive Battery terminal

fredjones · Nov 5th, 2009, 07:29

Hi I have been having alternator problems which i still have issues with, i have noticed the positive lead to battery has broken and is loose on battery terminal, engine will still run but will this effect the charge from alternater to battery, Thanks Fred

andycallaghan · Nov 5th, 2009, 08:41

Very much so! On an old car I had a loose and knackered battery clamp which stopped the alternator from working. £5 to change clamp and it worked fine.

fredjones · Nov 9th, 2009, 16:40

Changed battery clamp still have same problem this car is doing my head in

andycallaghan · Nov 9th, 2009, 16:44

What about alternator belt?
How loose is it?
Does it have much play in it?

migrator · Nov 9th, 2009, 18:22

Can you get out the voltage stabiliser unit from the alternator and check the carbon brushes for good size (and contact)? Also check the commutator ring for build up of carbon dust between the copper strips.

fredjones · Nov 9th, 2009, 21:10

Aternator belt is tight, i have had the brushes out and are quite long i don`t have a volt meter, but a alternator tester from maplins that says current going to battery all the lights light up-----Fred

andycallaghan · Nov 9th, 2009, 21:17

I used a good old-fashioned multimeter to test my battery.
12v without engine running, 13.3v (or something like that) with engine on.

Have you checked fluid in the battery? Is the battery nackered?
If there tester says current is going to the battery ok, then maybe the battery is at fault for not holding the battery.

A car garage should test the battery for you.

martin p · Nov 10th, 2009, 17:41

If you are still having problems after checking battery.

Check the engine to bodywork earth strap with an ohm meter, a good earth should have low resistance.

Good Luck.

Nov 5th, 2009, 07:29	#1
fredjones New Member Last Online: Jul 6th, 2010 07:43 Join Date: Apr 2009 Location: Runcorn	positive Battery terminal Hi I have been having alternator problems which i still have issues with, i have noticed the positive lead to battery has broken and is loose on battery terminal, engine will still run but will this effect the charge from alternater to battery, Thanks Fred

Nov 9th, 2009, 18:22	#5
migrator Aye - him again Last Online: Yesterday 16:23 Join Date: May 2001 Location: HAWICK	Can you get out the voltage stabiliser unit from the alternator and check the carbon brushes for good size (and contact)? Also check the commutator ring for build up of carbon dust between the copper strips. __________________ (Ouch - that's another knuckle ...) VOC 11817

Nov 5th, 2009, 08:41	#2
andycallaghan VOC Member Last Online: Sep 12th, 2012 21:26 Join Date: Oct 2009 Location: Kent/London	Very much so! On an old car I had a loose and knackered battery clamp which stopped the alternator from working. £5 to change clamp and it worked fine.

Nov 9th, 2009, 16:40	#3
fredjones New Member Last Online: Jul 6th, 2010 07:43 Join Date: Apr 2009 Location: Runcorn	Changed battery clamp still have same problem this car is doing my head in

Nov 9th, 2009, 16:44	#4
andycallaghan VOC Member Last Online: Sep 12th, 2012 21:26 Join Date: Oct 2009 Location: Kent/London	What about alternator belt? How loose is it? Does it have much play in it?

Nov 9th, 2009, 21:10	#6
fredjones New Member Last Online: Jul 6th, 2010 07:43 Join Date: Apr 2009 Location: Runcorn	Aternator belt is tight, i have had the brushes out and are quite long i don`t have a volt meter, but a alternator tester from maplins that says current going to battery all the lights light up-----Fred

Nov 9th, 2009, 21:17	#7
andycallaghan VOC Member Last Online: Sep 12th, 2012 21:26 Join Date: Oct 2009 Location: Kent/London	I used a good old-fashioned multimeter to test my battery. 12v without engine running, 13.3v (or something like that) with engine on. Have you checked fluid in the battery? Is the battery nackered? If there tester says current is going to the battery ok, then maybe the battery is at fault for not holding the battery. A car garage should test the battery for you.

Nov 10th, 2009, 17:41	#8
martin p New Member Last Online: May 13th, 2015 19:44 Join Date: Sep 2006 Location: carnforth	If you are still having problems after checking battery. Check the engine to bodywork earth strap with an ohm meter, a good earth should have low resistance. Good Luck.

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