Question about 2005 GMC Yukon Denali

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05 yukon volt meter fluctuates

Volt meter somtines 13v , sometime 14volt ,somtime 15volt.

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Posted on Jan 02, 2017


SOURCE: how to check the alternator to see if it's

They have expensive tools and equipment to test alternators but you can get by with a simple digital volt meter. With the volt meter on DC voltage attach each lead to the corresponding terminals on the battery. With the engine running and all the electrical loads on (such as the head lights, radio, defrost, wipers, radio etc). the voltage reading should be between 13 and 14 volts. If you actually only have 9 volts then the alternator isn't charging and you'll have to look in to that more. The truck wouldn't be able to start or run very well with only 9 volts so i'd be willing to bet the gauge is bad or possibly a wiring fault.

Posted on Jan 02, 2010

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SOURCE: 2004 gmc yukon new alternator and volt meter still not at regular range

You should test battery next day 12.5V,should check alternator 14.5V You should check first which is bad.then replace.

Posted on Feb 19, 2013

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Volt meter fluctuates in cold weather

well that is battery volts.
but id never trust that dash meter, i use a real meter, to see if the dash gauge is fibbing. see?

if it is, then we work the meter. or data to it.
if the battery varies, then the alternator system is malfing,
if the battery does not vary, but the cig lighter port varies, that is wiring issues,

fluctuations if real?
is battery is doing that or the wiring. from it.
has voltage drops. (bad wiring) along the way.
if all is good, in wiring at battery , at cig and dash,
then the gauge is bad or the PCM is sending bad data to cluster computer.
first is to scan it, scan the pcm.
got DTC errors?

Mar 08, 2015 | 2003 Jeep Grand Cherokee

1 Answer

Light stays on

Well did you replace your batt, jump some one or light come on while driving? check your alternator out put with an volt meter must read over 13v if not alternator may be at falt, also check alternator fuse 7.5amp good luck

Aug 25, 2014 | Toyota Avensis Cars & Trucks

1 Answer

Clock goes back to 12 every time it is started back up. Needle on battery meter fluctuates while in idle.

it's mean that the battery current to radio when to 0volt.
find out battery or alternator problems like battery voltage. a load test . or alternator is charging
hope it helps

Mar 17, 2014 | 2004 GMC Yukon

2 Answers

Battery wont charge, battery/ABS/SRS/BRAKE lights come on while driving and flicker. voltage increases to dash lights/fan speed/headlights periodically.

Get a volt meter, start your car and see how many volts your car is producing while running. Should be around 14 volts. May want to watch the meter for a while since your electric seems to fluctuate. Most voltage regulators are internal of your alternator. If you are getting a lot more or less than 14 volts while running, replace the alternator. If it is not charging, voltage will drop as vehicle runs, until battery is dead.

Dec 12, 2013 | Cars & Trucks

1 Answer

Can 14volt battery be used in a 2003 Acura CL?

Explain that !!

Vehicle batteries are referred to as 12 volts

Only drag racing has a 12 & 16 volt in one case

Mar 03, 2013 | Acura Cars & Trucks

1 Answer


Rear heat not working ? The blower motor isn't working ? No air coming from the rear vent's ? Is it just a yukon or XL or denali ? What size engine ? 4.8 , 5.3 or 6.0 l Manual or automatic climate control ? Does the blower motor work on any speed ? The front an rear heater system are seperate , have there own electrical circuits . Could have a couple of different systems ,could have a control processor or relay's an a resistor block . Do you know how to test automotive electrical circuit's using a wiring diagram and a DVOM - digital volt ohm meter ? Plus to get at the rear heater-A/C unit you would need to take the right rear trim panel off .
2003 Tahoe No Rear Heat Fix Suburban Yukon XL Repair

Dec 08, 2017 | 2005 GMC Yukon

2 Answers

2003 bmw alternator giving 14volt no charge to battery

Can not charge a dead battery

You should have just over 14 volts running, if battery
is good

Current or Amps is not the same thing as voltage

You can check that also if you have an amp clamp for the
volt meter

Nov 29, 2012 | 2003 BMW 325

1 Answer

Low voltage

Have the out put voltage on you altenator checked, if it's fluctuating it may be going bad

Oct 25, 2017 | 1994 Buick Regal Gran Sport

3 Answers

When the Jeep was new the volt meter read 14 the volt meter reads 13 volts with a one year old battery. Since the battery is a 12 volt battery should there be any concern that the volt meter...

It needs to be looked at,hook a volt meter to the battery,and start the engine,turn the ac on high blower,and the head lights on,the alternator should be putting out 13.65 volts to 14.25 volts,if it is any lower than this,replace the alternator,now,if the reading is not the same as in the vehicles volt meter,then the cables,positive and negative need to be replaced,the cables get old,and corrode on the inside and break down,they do not carry the current as they should.Shuold you decide to replace them,go with a larger diameter cable,both positive,and negative.

May 28, 2010 | 1996 Jeep Grand Cherokee

1 Answer

2002 GMX Yukon Denali XL will not start and battery has a charge.

get a boost to start it. after you start it let it charge up the battery on it's on. if it does not charge the alternator might be defective.

Mar 18, 2009 | 2002 GMC Yukon Denali

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