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EF V8 Low Charging Voltage 


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 Post subject: EF V8 Low Charging Voltage
Posted: Sun Jan 18, 2015 9:35 am 
Getting Side Ways

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Joined: 1st Jan 2006

Ride: Lots, all Fords

Location: Hamilton
New Zealand

Any nown issues with EF V8 alternators with low charging voltage? I have an EF V8 Fairmont and charge voltage is is about 13.5V. Swapped alternators to a spare I had, but same low charging voltage. I'm used to seeing arounf 14.5V on charging. Battery is OK. But the car struggles to start after driving around town (thermofans running etc). A jump start turns the motor over normally, so it's not the starter motor



XA Faimont 351C, AU2 XR8 Manual 5.0, DA LTD 5.0, Mk1 Capri 5.0, 1995 Mustang 5.0, EF2 XR8 Manual, EF2 Fairmont Ghia 5.0, AU3 XR8 Auto, AU2 XR8 Auto, AU2 XR8 Manual Ute, TE Cortina 5.0 Manual, DU LTD 5.0 soon to be manual

 Post subject: Re: EF V8 Low Charging Voltage
Posted: Sun Jan 18, 2015 1:17 pm 
Technical Contributor
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Age: 58

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Ride: 96 XH/97 EL

Location: South Coast
NSW, Australia

Check the negative terminal earths to the body, and engine block. Get a multimeter and see what (if any) voltage drops you get across them with engine running.
Wouldn't hurt to unbolt them and give them a clean, along with the battery terminals too.

I'd be expecting around 14.0v idle voltage.

Oh, and check the alternator plug for crap/corrosion, etc.



96 XH Longreach 'S': LPG, Alarm, 3.23:1 LSD, Cruise, Trip Comp, ABS, Power Windows, Mid Series Dome Lt, Climate Ctrl
97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

 Post subject: Re: EF V8 Low Charging Voltage
Posted: Tue Jan 20, 2015 7:38 pm 
Technical Contributor

Posts: 556

Joined: 13th Jul 2013

Location: Campbelltown
NSW, Australia

as per snap0964 -
do thermo fans run all the time or not ??
have battery tested
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