Question about Gb Electrical Gardner Bender GVD-504A Circuit Alert Non-Contact Voltage Tester

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Irregular function of tester GVD-504A

The device at times will not operate and then without any objective reason will begin to function again as expected. Does this indicate a problem with the battery strength or possible corrosion internally? How is the batter accessed?

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  • Bob
    Bob May 11, 2010

    I just dug my tester out of my tool bag. It's a Sperry VD6505, 12 to 1000 Volts AC with adjustable sensitivity. Give one a try. They work great.

  • Bob
    Bob May 11, 2010

    Those are great devices when they work, but I throw them away when they start acting irradically. Not worth the risk. Doesn't matter the brand either, I've seen just about all the brands do that. Greenlee is real bad for that. I had a Fluke that did it too, but the Fluke I have now has been doing ok. The best one I ever owned was a Sperry. Usually it's the contacts inside that aren't making good contact in the battery circuit. Yes, I'm an electrician, and my life depends on those babies, and I sure don't want one that works when it wants too.



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There are two button cell batteries located in the top of the unit. Try removing the black cap. Some twist off and some pull straight up. Note the polarity of the batteries.

Posted on Feb 09, 2009


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1 Answer


Any 303 or 357 silver oxide battery will work. You can find these at battery outlets, box stores, and watch repair stores.

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Does a GB 504 A have a battery?

The 504A uses two silver oxide 357 button batteries. The black top is just press fit in. Gently pry it off. The batteries install with the positive side down.

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There is no polarity-only active... Blinking means live wire. The further you get from active the slower it blinks....

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What kind of batteries do i need

2 "AA"batteries,but watch this model,theres a re call on it right now thru fluke

Mar 14, 2010 | Gb Electrical Gardner Bender GVD-504A...

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Can't open to change batteries

Need to grab it tight on both sides at black end by pocket clip, and wiggle slightly and pull out at same time. Pocket clip comes off with it.

Jan 03, 2010 | Gb Electrical Gardner Bender GVD-504A...

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Is there a manual for a gb gvd-505a live wire tesrer

Gardner Bender does not offer support or online documentation for these small devices.

CLICK HERE to verify.

Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.

Dec 19, 2009 | Gardner Bender GVD-505A Non-Contact...

1 Answer

I have 6 outlets that do not work.

I would start by determining if these 6 outlets are on the same circuit. Also I am usually not too confident in the non contact voltage tester you are using. They tend to give false positives if they contact anything or even if you move them fast. I would invest in an inexpensive multimeter whcih will allow you to test actual voltage across the poles and ground and also check for continuity between poles/ground (WITH CIRCUIT OFF ONLY).

Did these outlets previously work properly?

Jan 02, 2009 | Gb Electrical Gardner Bender GVD-504A...

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