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Voltage problem

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SUPERMAN2
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Voltage problem

Postby SUPERMAN2 » May 23rd, 2015, 7:15 pm

Good day fellas i notice my alternator only reading 13.something when i put on ac it dropping to 12.something and the temp going up if i take off ac the car cools back down

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supercharged turbo
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Re: Voltage problem

Postby supercharged turbo » May 23rd, 2015, 7:20 pm

The voltage will drop when you put on the A/C because their is a load.The additional load would require the engine to work harder therefore more heat

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Lance
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Re: Voltage problem

Postby Lance » May 23rd, 2015, 7:27 pm

supercharged turbo wrote:The voltage will drop when you put on the A/C because their is a load.The additional load would require the engine to work harder therefore more heat


I'm not sure if it's the same with you. But when I switch my a/c on under normal conditions the temperature tends to drops owning to the fan activation. This usually counters the additional load.

Seeing a voltage drop is however normal.

OP did you check to see if the fans are switching on when you put on the a/c?

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SUPERMAN2
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Re: Voltage problem

Postby SUPERMAN2 » June 28th, 2015, 6:45 pm

Yup both fans are on when i put on the ac

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Master of Disaster
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Re: Voltage problem

Postby Master of Disaster » June 28th, 2015, 7:38 pm

Have your battery checked . and your radiator . if it has poor circulation this would contribute to your overheating prob . and for voltage if your battery isn't good your alternator would receive a resistance voltage which would cause a low charge .try using another battery and if this don't work then check your ground(-) wire .this would also cause a low voltage

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Master of Disaster
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Re: Voltage problem

Postby Master of Disaster » June 28th, 2015, 7:39 pm

spaceman24 wrote:Have your battery checked . and your radiator . if it has poor circulation this would contribute to your overheating prob . and for voltage if your battery isn't good your alternator would receive a resistance voltage which would cause a low charge .try using another battery and if this don't work then check your ground(-) wire .this would also cause a low voltage
adding to this make sure your battery poles are tight

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SUPERMAN2
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Re: Voltage problem

Postby SUPERMAN2 » July 26th, 2015, 11:04 pm

Its a brand new mishimoto radiator and the battery is new
Battery poles tight

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Re: Voltage problem

Postby EEng » September 29th, 2015, 12:01 pm

Research load response control, I think that could be why...

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JJ16
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Re: Voltage problem

Postby JJ16 » September 30th, 2015, 8:10 pm

Where did you get the voltage from? Inside the car (voltage meter) or using a multimeter on the battery to get the figures?

What size radiator ...3 core?

Which fans? correct fans?

As for the response of switching battery, just simply disconnect the battery and use a multimeter to get figures..

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Re: Voltage problem

Postby wagonrunner » September 30th, 2015, 8:14 pm

has the temperature ever gone up after driving the vehicle above 3000rpm for a while and then coming to a stop?

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