Electrical Switches - Specialty - Battery Cut-Off - 100 Amp Battery Isolator
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Electrical Switches - Specialty - Battery Cut-Off - 100 Amp Battery Isolator
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AutoCraft Electrical Switches - Specialty - Battery Cut-Off - 100 Amp Battery Isolator

Part No. 85988 Warranty  

Fit of this part varies by vehicle & equipment specs Type of Fit

Autocraft offers a Battery Cutoff Switch for a wide range of applications. Our Battery Cutoff Switch is constructed of high-quality materials for long-lasting durability.

Product Features:
  • Suitable for either 12 or 24 volt systems
  • Available for 1-amp applications
  • Easy installation-splice in the new switch to your existing wiring
  • Also suitable for a broad range of industrial and commercial uses
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Connector Type:Screw
Housing Color / Finish:Black
Housing Material:Plastic
Maximum Amperage:100
Switch Color / Finish:Black
Switch Material:Plastic
Switch Type:Cut-Off
Throw Type:Single

REVIEW SNAPSHOT®

by PowerReviews
AutocraftElectrical Switches - Specialty - Battery Cut-Off - 100 Amp Battery Isolator
 
4.3

(based on 4 reviews)

Ratings Distribution

  • 5 Stars

     

    (3)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

    Cons

      Best Uses

      • Car (3)

      Reviewed by 4 customers

      Sort by

      Displaying reviews 1-4

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      (8 of 16 customers found this review helpful)

       
      5.0

      battery cut off switch

      By neal

      from Orange Park, FL

      About Me Auto Enthusiast, Casual Driver

      Verified Buyer
      Helpful Reviewer

      Pros

      • Easy to use

      Cons

        Best Uses

        • Car

        Comments about Autocraft Electrical Switches - Specialty - Battery Cut-Off - 100 Amp Battery Isolator:

        excellent product-fair price

        Comment on this review(earn points)

        (17 of 29 customers found this review helpful)

         
        2.0

        key broke before installed-only one key

        By edt

        from midland,tx

        About Me Casual Driver

        Level 2

        Pros

          Cons

          • Flimsy

          Best Uses

          • Truck

          Comments about Autocraft Electrical Switches - Specialty - Battery Cut-Off - 100 Amp Battery Isolator:

          Never got installed after key broke -no spare

          Comment on this review(earn points)

          (39 of 64 customers found this review helpful)

           
          5.0

          Works great

          By Meltman

          from Chicago IL

          About Me Auto Enthusiast, Competitive Driver, Mechanic

          Verified Buyer
          Level 2

          Pros

          • Smooth action
          • Two keys

          Cons

          • Weird hole spacing

          Best Uses

          • Car

          Comments about Autocraft Electrical Switches - Specialty - Battery Cut-Off - 100 Amp Battery Isolator:

          Besides the somewhat weird hole spacing, this switch works very well. I'm using it in my car for storage purposes so I don't continue to ruin batteries while the car sits. The switch action is smooth and the switch also feels decently made. I don't anticipate the switch falling apart any time soon.

          Here are some additional details not provided by Advance:
          For either 12 or 24 volt systems
          100amps and continuous load
          500amps for 5 seconds burst load
          Key is removable in the off position only.
          Comes with two keys
          Use 3/8" ring terminals for the posts
          Should be used to disconnect the positive terminal

          Overall I'm very pleased with it.

          Comment on this review(earn points)

          (77 of 118 customers found this review helpful)

           
          5.0

          Used as a problem solver

          By Buickguy

          from SAXTON, PA

          About Me Auto Enthusiast, Casual Driver

          Verified Buyer
          3 or more reviews submitted

          Pros

          • Versatile

          Cons

          • None

          Best Uses

          • Car
          • RV

          Comments about Autocraft Electrical Switches - Specialty - Battery Cut-Off - 100 Amp Battery Isolator:

          I used this as a patch until I could find where the battery drain was. It works to cut off the electrical system thus saving my battery. I finally found the problem but left this in as a theft deterrent.

          Comment on this review(earn points)

          Displaying reviews 1-4

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          Do you have questions about this product?(earn points for answers!)

           

          Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

          10 Questions | 13 Answers
          Displaying questions 1-10
          • Q:

            Which terminal do you connect this to? Can you explain the pros and cons and whether it makes any difference?

            I am a little confused because of the conflicting responses to this question.

            Customer care provided specific instructions to locate it near the negative terminal so that it would reach the switch. However, in the same instructions it was stated to cut the positive.

            Customer care in another response to which terminal to connect it too said "positive"

            A response from someone else said: "I would recommend the negative side. That way the battery is isolated from the chassis and a short between metal objects under the hood and the positive terminal cannot occur. My cousin once melted a gold watch band around his wrist and required surgery to remove it. I have several wrenches with "burn nicks" where I thought "I can tighten that terminal without touching the fender". I was wrong more than once!"
            Asked on 7/9/2013 by Don from Indiana

            1 answer

            • CUSTOMER CARE

              A:

              Sorry for any confusion caused. With reference to your inquiry on the Autocraft Electrical Switches - Specialty - Battery Cut-Off - 100 Amp Battery Isolator - Part No. 85988 when you remove a battery from a car you should always disconnect the negative terminal first and then the positive. The reason for this is because as soon as you disconnect the negative terminal there is no way you can accidentally short the battery when removing the positive terminal. As far as battery cut off switches go it really doesn't matter because either terminal will kill power from the battery. But if you put it on the positive terminal the battery negative terminal is still connected to the chassis of the car, so if anything conductive comes in contact with the positive terminal and the chassis it will short the battery. For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

              Answered on 7/15/2013 by John the Car-Doc from AAP
          • Q:

            Will this work on a car or minivan? I own a 1999 Dodge Grand Caravan. It is not used much. The battery frequently drains from either sitting too long without use or from something left on or something plugged into the cigarette lighter.
            Asked on 5/22/2013 by BJHauto from United States

            1 answer

            • CUSTOMER CARE

              A:

              Cars, boats and RVs frequently use battery cut-off switches to prevent a slow power drain on their batteries when the vehicles are not in use. Cut-off switches physically sever the connection between a battery and the devices that run off of it. This keeps devices that may be left on or automatically switch on from draining a vehicle's battery, leaving it unable to start. This Autocraft Electrical Switches - Specialty - Battery Cut-Off - 100 Amp Battery Isolator (Part No. 85988) is universal and not a vehicle specific. It is suitable for either 12V or 24V systems and its maximum Amperage is 100. Also suitable for a broad range of industrial and commercial uses. For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

              Answered on 5/22/2013 by Max from AAP
          • Q:

            what size are the terminal studs
            Asked on 2/22/2013 by paul from miami,fl

            2 answers

            • A:

              3/8"

              Answered on 6/21/2014 by John from Tennessee
            • CUSTOMER CARE

              A:

              For further assistance regarding the Autocraft Electrical Switches - Specialty - Battery Cut-Off - 100 Amp Battery Isolator (Part No. 85988), please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

              Answered on 2/23/2013 by Steve from AAP
          • Q:

            My old cutoff went on the car battery. Can you tell me where you install this in a car?
            Asked on 11/23/2012 by Catfisher from Central Illinois

            1 answer

            • CUSTOMER CARE

              A:

              With reference to your inquiry on the Autocraft Electrical Switches - Specialty - Battery Cut-Off - 100 Amp Battery Isolator - Part No. 85988, we will need more information including the year, make, model, and engine size of your application before we can make a suggestion. Please call us at 1-877-ADVANCE (238-2623) or visit the nearest Advance Auto store and we would be more than happy to further assist you.

              Answered on 11/24/2012 by John the Car-Doc from AAP
          • Q:

            Is this the isolator switch that prevents engine noise while talking on the CB radio?
            Asked on 11/10/2012 by bo

            1 answer

            • CUSTOMER CARE

              A:

              No, I am sorry. The Autocraft Electrical Switches - Specialty - Battery Cut-Off - 100 Amp Battery Isolator - Part No. 85988 is a battery disconnect switch. The installation of a battery disconnect switch is usually done either for safety considerations or as an anti theft device or both. The safety aspect of the switch is to remove battery power to all of the car’s electrical system so that if you are working on the car or something goes wrong while driving, you can quickly turn the power off. When the battery is disconnected, any fire or rough metal that melts or cuts the wire insulation and shorts it to the body (chassis) will have no effect on the electrical system — unless the fire reaches the battery. Unfortunately I do not see an isolator switch available online. I would recommend that you check with the nearest Advance Auto store or call us toll free at: 1-877-238-2623 and one of our representatives will gladly assist you with any questions or concerns you may have.

              Answered on 11/12/2012 by John the Car-Doc from AAP
          • Q:

            How do you0 install it. Be specific and do instructions come with the package?
            Asked on 7/17/2012 by nick from bellevue ohio

            1 answer

            • CUSTOMER CARE

              A:

              Cars, boats and RVs frequently use battery cut-off switches to prevent a slow power drain on their batteries when the vehicles are not in use. Cut-off switches physically sever the connection between a battery and the devices that run off of it. This keeps devices that may be left on or automatically switch on from draining a vehicle's battery, leaving it unable to start. Cut-off switches may also be used as an anti-theft device, because a vehicle will not start unless the cut-off switch is on. Locate your vehicle's battery and the negative wire, which is usually black. Disconnect the negative wire from the battery. Select a flat surface to use as a mounting location for the cut-off switch. The location should be close enough to the battery that the negative wire can reach the location and then reach back to the battery. Place the switch against the surface and mark the mounting hole locations with a pencil. Drill pilot holes in the surface. The holes should be slightly smaller than the screws that you will be using to mount the switch. Screw the switch into place. Cut the positive wire so that there is enough wire to run from the battery, to the switch and then to the wire's original source. Strip the last 1/4 inch of insulation from the new ends of the wires. Insert the exposed wire ends into the switch's terminals. Screw that you need to tighten to secure the wire. For any further assistance, please visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representative there would be more than happy to assist you.

              Answered on 7/17/2012 by Vincent from AAP
          • Q:

            I have a diesel pick-up w/2 batteries. Do I need 2 of these cut offs?
            Asked on 11/21/2011 by Anonymous from Milwaukee, Wi

            2 answers

            • CUSTOMER CARE

              A:

              This can hold up to a 300 amp. current. As long as the two batteries are not producing more than a 300 amp. current, one switch should work fine.

              Answered on 11/21/2011 by Vincent from AAP
            • A:

              just 1 to keep 1 batt. from drawing down so u can start truck in case of overdraw. R.D.at 01440

              Answered on 12/6/2011 by ramos from 800
          • Q:

            should this be installed on the + or - side?
            Asked on 9/4/2011 by john from tn

            2 answers

            • A:

              I would recommend the negative side. That way the battery is isolated from the chassis and a short between metal objects under the hood and the positive terminal cannot occur. My cousin once melted a gold watch band around his wrist and required surgery to remove it. I have several wrenches with "burn nicks" where I thought "I can tighten that terminal without touching the fender". I was wrong more than once!

              Answered on 9/17/2011 by ARYLIOA from Foley, Alabama
            • CUSTOMER CARE

              A:

              It should be connected on the + ve side.

              Answered on 9/6/2011 by Dennis from AAP
          • Q:

            Is this product appropriate or use on pwc's (personal watercraft)?
            Asked on 7/29/2010 by Mark the numbers guy from Northville, MI

            1 answer

            • CUSTOMER CARE

              A:

              You should be able to, but I would recommend making sure that water never touched the electrical connections.

              Answered on 8/1/2010 by Mike from AAP
          • Q:

            Is this product heavy duty enough for a semi-tractor with 4 batteries?
            Asked on 3/27/2010 by Anonymous

            1 answer

            • CUSTOMER CARE

              A:

              This can hold up to a 300 amp. current. As long as the 4 batteries are not producing more than a 300 amp. current this should work.

              Answered on 7/7/2010 by Kevin from AAP
          Displaying questions 1-10

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