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Author Topic: Halford's alternators...No thanks  (Read 1908 times)

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Ken T

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Halford's alternators...No thanks
« on: 06 March 2011, 00:26:08 »
Remember I got taken for a ride by Halfords and charged £170 for fitting a recon alternator. Well, the car has been slightly hesitant starting recently, so I measured the battery volts, at tickover after running for a few mins. Its down at 12.5V  :'(   

What's going on ?.

Ken
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henryd

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Re: Halford's alternators...No thanks
« Reply #1 on: 06 March 2011, 00:27:40 »
you ain't charging properly :(
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Re: Halford's alternators...No thanks
« Reply #2 on: 06 March 2011, 00:32:39 »
Take it back, must be under some sort of warranty..... :(
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Seth

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Re: Halford's alternators...No thanks
« Reply #3 on: 06 March 2011, 01:36:53 »
Securely connect a jump lead from the battery negative post to somewhere like a manifold stud on the engine.

Measure the output then.

If it returns to specified output, then you have an earthing problem, which is quite common.
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Re: Halford's alternators...No thanks
« Reply #4 on: 06 March 2011, 07:23:13 »
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you ain't charging properly :(

...but they are.... ::)
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tunnie

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Re: Halford's alternators...No thanks
« Reply #5 on: 06 March 2011, 08:23:17 »
check the voltage directly off the alternator, poor voltage could be the crimp to the negative battery terminal....
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Ken T

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Re: Halford's alternators...No thanks
« Reply #6 on: 07 March 2011, 23:06:46 »
Quote
Securely connect a jump lead from the battery negative post to somewhere like a manifold stud on the engine.

Measure the output then.

If it returns to specified output, then you have an earthing problem, which is quite common.

Thanks, I had forgotten about bad earth connections. I cleaned the negative terminal and attached leads, and the battery volts are up to 13.2V ish. Close enough  :y

Ken
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Kevin Wood

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Re: Halford's alternators...No thanks
« Reply #7 on: 08 March 2011, 10:08:19 »
Quote
check the voltage directly off the alternator, poor voltage could be the crimp to the negative battery terminal....

The positive terminal is the usual one to go, because the wire from the engine flexes a little as the engine moves.

Quote
Thanks, I had forgotten about bad earth connections. I cleaned the negative terminal and attached leads, and the battery volts are up to 13.2V ish. Close enough

Still not enough to keep the battery fully charged unless it improves at higher RPM, though. :-/

Kevin
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henryd

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Re: Halford's alternators...No thanks
« Reply #8 on: 08 March 2011, 10:20:27 »
Quote
Quote
check the voltage directly off the alternator, poor voltage could be the crimp to the negative battery terminal....

The positive terminal is the usual one to go, because the wire from the engine flexes a little as the engine moves.

Quote
Thanks, I had forgotten about bad earth connections. I cleaned the negative terminal and attached leads, and the battery volts are up to 13.2V ish. Close enough

Still not enough to keep the battery fully charged unless it improves at higher RPM, though. :-/

Kevin

yep,agreed,voltage at around 2k revs should be around 14-14.3 volts
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