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Computer Safe Logistic Probe

Computer Safe Logistic Probe

Item # PTW2991
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  • Reviews (7)
  • Q & A (0)
  • Videos (2)
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Performance Tool Electrical Tools - PTW2991

  • Circuit Tester
  • Testers
  • Performance Tool


Features:

  • Quickly tests high and low voltages on all vehicle circuits, including computerized engine and body controls
  • Tests power and ground voltages
  • Bright red and green LEDs interpret voltage signals such as ground, power and frequency
  • Computer safe, drawing less than 7 milliamps
  • Works on 6, 12 and 24 volt systems
  • Recoil lead wire able to reach 10 feet
  • Heavy gauge color coded battery clips

W2991 Performance Tool Computer Safe Logistic Probe



W2991 Computer Safe Logistic Probe

Installation Details PTW2991 Installation instructions


California residents: click here


Video of Computer Safe Logistic Probe

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Performance Tool Wiring - Tools for Wiring - PTW2991 Review

Today we're going to be taking a look at the performance tool computer safe logistic probe. It's going to feature a computer safe design drawing less then 7 mil amps. It will test high and low voltages on all vehicle circuits including computerized engine and body controls. It's going to feature a bright red and green LED. It's going to interpret voltage signals such as ground, power, and frequency. This system is designed to work on 6, 12, and 24 volt systems.

The test probe, that's this portion right here, that's going to measure pretty close to 3 and 3/16 of an inch, right around that area, 3 and 1/8. It's also going to come with your heavy gauge color coded battery clips. A really nice design, easy grip design on those. When the coiled cable or cord is fully stretched out it's going to be able to reach up to 10 feet. When you're ready to use or connect the probe what you'll need to do is you'll need to connect the probe clips to the vehicle's battery. The red clip, again, it's color coded so that's going to go to the positive terminal.

The black clip goes to the negative terminal. You'll need to turn the power on to the component or circuit being tested. Keep in mind the ignition may need to be in on or accessory position. In some cases the engine may need to be running. All you have to do is touch the components circuit wire with the probe's tip.

The LED will glow red if positive source is probed, or green if a negative source is probed. That tip right here, it's going to measure about 3 and 3/16 of an inch long and it's insulated. If the LED does not glow at all the probe may not be making contact with the wire. The wire or the component maybe faulty. Power may not be reaching the circuit or the circuit may not be properly grounded. That's going to do it for today's look at the performance tool computer safe logistic probe.

Customer Satisfaction Score:


Customer Reviews

Computer Safe Logistic Probe - PTW2991

Average Customer Rating:  5.0 out of 5 stars   (7 Customer Reviews)


by:

Exactly what I needed, much better than an old typical test light.



by:

Excellent electrical tester



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See what our Experts say about this Performance Tool Electrical Tools

  • Troubleshooting LED Trailer Taillights Ground Connection Issues
    If you are getting power to the taillights themselves than this sounds like a ground wire issue on the trailer or on the vehicle connector. I recommend using a Circuit Tester # PTW2991 to check that you are getting a good ground connection. Use the tester to confirm that the ground connection is present starting at the truck and working your way back trough the wiring system all the way to the taillights. With LED's that require so much less power the ground connections tend to need a better...
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  • Trailer Lights Not Working On Multiple Trailers With 2005 GMC Sierra 1500
    It definitely sounds like an issue with your 7-way connection or the wiring that leads to it on your 2005 GMC Sierra 1500 Z71. I recommend using a Circuit Tester # PTW2991 to begin checking the poles of the 7-way on your Sierra. First make sure to check your fuses and relays that are under the hood and in the cabin for any that are damaged. The circuit tester can help with that task as well. Once all the fuses and relays are checked begin checking the poles on the 7-way. If you find...
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  • Troubleshooting Trailer Disconnected Code for Integrated Brake Controller on a 2017 Ford F-350
    What you need to do is test the 7-Way connector both on your 2017 Ford F-350 and your trailer. Since your F-350 is new I doubt that it is on the vehicle side but you can use a circuit tester like part # PTW2991 and the attached picture of a vehicle 7-Way to make sure that all of the functions are operating properly. To test the 7-Way on your trailer simply take a 12V battery and ground the negative terminal while using the positive terminal to apply power to each pin on the 7-Way. If one...
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  • Troubleshooting Trailer Wiring for Fleetwood Pop-Up Trailer and 2003 Mazda B3000 Pickup
    A potential cause for your issue is a weak ground connection. Trace the white ground wire from your 4-pole back to where it attaches to the vehicle frame. This ground must be secured to a clean and rust-free spot on the frame. If necessary sand off the rust/dirt from that grounding point and reattach the white ground wire or relocate it a new spot. If this does not correct the problem then I suggest you next test your existing 4-pole trailer connector on your Mazda to confirm it is functioning....
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  • 7-Way Trailer Connector Wiring With No Identifying Wire Markings
    I would begin by using a small 12 volt battery to start isolating the wiring. First you will want to trace the wiring to determine which wire is the ground wire. It should be grounded to the frame. Connect the ground to the negative battery terminal. Begin placing each wire individually to the positive terminal and identifying what each wire operates. Once you have identified the wires I have included a wiring diagram for both the trailer and vehicle sides so that you will be able to...
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  • Fuse Location for 7-Way 12V Power Pin on a 2010 Ford F-250
    Check fuse 44 in the fuse block under the hood of your 2010 Ford F-250 as well as the relay in position 56. According to the online version of your owner's manual these are also related to the 12V power pin on your F-250. If those look good then the next thing you can do is use a circuit tester with a probe like part # PTW2991 and check the 12V wire from your 7-Way to your battery. Replace any pieces that are damaged or pinched with 10 Gauge Wire # 10-1-1.
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  • Troubleshooting Flickering Passenger Side Brake Light On A 2017 Ford Explorer
    Hey Tim, I am happy to try to help you get to the bottom of it. While there are a few things that could cause the brake light to flicker, the most common cause is a short somewhere on the brake light circuit. Since the diodes were replaced and it did not fix the problem, a short would explain the issue. Your best bet would be for you (or your mechanic) to inspect the diode wiring harness, as well as the vehicles tail light circuits and look for any frayed or damaged wire that could be causing...
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  • Trailer Brake Controller Not Working on 2018 Chevrolet Suburban
    On your 2018 Chevrolet Suburban if you are using the Tekonsha Plug-In Wiring Adapter # 3016 with your Tekonsha Prodigy P3 # 90195 there is no other connection required. You can check to make sure the fuse # 36 is still in place on your engine compartment fuse block. Be sure to check the fuse to ensure it is not damaged and it is the correct amperage required. A Circuit Tester # PTW2991 can be utilized to ensure that you are getting power at the brake controller wires to determine if...
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  • Blinkers on Travel Trailer Not Bright When Running Lights Are On
    I would first ensure that the connections are correct in your wiring. If your running lights and turn signals/ brake are reversed this could cause the issue that you are having. The black wire on the Taillight # STL68RB should connect to your running lights on the trailer, this is usually the brown wire. The red wire from the taillights connects to the turn/brake wire which are generally yellow and green on the trailer. If that is right next I would check the ground connections as they...
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  • 4-Way Wiring Issue on 1997 Jeep Wrangler With LED Taillights
    I believe we are running into one of 2 issues. I believe the issue may be with the LED taillights that you installed 6 months ago. Depending on how they are controlled that might be where the issue is coming from. It could have its own circuitry that is causing the power to crossover and that is why you are seeing both turn signals going when they shouldn't be. I recommend reaching out to the Taillight Manufacturer to see if they are aware of this being an issue. The second could be the...
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  • Locations for Left and Right Turn/Stop Trailer Fuses on a 2011 Ford F-450 Super Duty
    I took a look in the online version of the owner's manual for your 2011 Ford F-450 Super Duty and it looks like the right turn/stop is fuse location 13 while the left turn/stop is fuse location 14 in your passenger compartment fuse box. In the power distribution box (under the hood) the left turn/stop is location 74 while the right turn/stop is location 75. I recommend verifying this in your copy of the owner's manual. If these fuses look good but you still aren't getting a signal when...
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  • 2017 Chevy Traverse Troubleshooting No Power for T-One Trailer Wiring
    The T-One Vehicle Wiring Harness # 118271 does come with all of the fuses and relays for your 2017 Chevy Traverse, but if all of those look good I'm wondering if the issue is on your vehicle side. It's definitely possible that it could be the T-One wiring but I recommend using a circuit tester like part # PTW2991 to see if the locations for the fuses are actually passing the power for the circuit. If nothing is happening at the fuse/relay positions then you'll need to take your Traverse...
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  • 5TH Wheel RV Breakaway Switched Removed During Storage Testing for Damage
    I would start with reinserting the Breakaway Cable Plunger # FA80-01-2206. Your breakaway box uses power from your battery on the 2018 Keystone Montana 3791RD 5th Wheel. You will want to ensure the battery wasn't completely drained during this time. If dead be sure to recharge the battery. The brakes should unlock but it may require you to backup to unlock them. If they are still locked and won't unlock you will have to find out if they are being held on by a faulty break away or by bad...
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  • Is there a Standard Wire Color and Function Code for a 7-Way Trailer Connector on a 2005 GMC Sierra
    Yes, there is no standard wiring color code so the wire functions could be anything. The only way to know for sure is to test the wires using a circuit tester such as # PTW2991. The ground will not have any voltage on it, or at least it should not unless there is a short to ground. The other wires will show power when the function associated with each one is activated (running lights, left/right turn and brake lights, reverse lights, 12 volt power which could be on all the time, and output...
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  • Relay Locations for Trailer Running Lights on a 2009 Ford F-250
    If you are getting no signal when testing the running light pin on your 2009 Ford F-250, with a tester like part # PTW2991, then it very well could be a fuse or relay. When I looked up the online owner's manual for your F-250 it looks like you want to check the relays in the #42 and #55 positions in your Power Distribution Box. Let me know if this doesn't fix your issue and I can help you troubleshoot further. I have linked some helpful articles on wiring to this answer page for you to...
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  • Troubleshooting NC Connection on Prodigy P2 Brake Controller With Brakes Getting Power
    It sounds like you need to check the tow vehicle and trailer connectors for any corrosion or damage. It is very interesting that your Prodigy P2 # 90885 is reading NC (No Connection) at the same time you activate your trailer brakes. If the trailer isn't connected are you getting 12V of power to the pin in the 5 o'clock position on your tow vehicle? Try testing this pin with a circuit tester like part # PTW2991 to verify this. If there is power coming to this pin without the trailer connected...
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  • Redarc Brake controller RED44FR
    It is possible to install the Redarc Tow-Pro # RED44FR into virtually every vehicle but will depend on the experience that the installer has. Most RV dealerships only like to go the Plug and Play route, which your 2016 Volvo XC90 does not offer. The Brake Controller is looking for 4 wire connections. A constant 12v power, a 12V ground, a brake switch power(the wire that only shows power when pedal is pressed) and an output to the trailer 7-way. If this is something that you want to attempt...
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  • What Is The Best Way To Test Connections To Determine Wire Function?
    The best way to test wire function is to use a wire probe like part # PTW2991. You can use this to test each individual wire or connection and determine its function. For example if you were to put the tester to the yellow wire, and you detect a pulsing signal with the left turn signal applied, then you have found your left turn circuit. You can use this process, and the process of elimination to determine the function of each wire.
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  • Installing Roadmaster Flexo-Coil Wiring on a 2019 Jeep Wrangler Rubicon JL
    According to my research you can use the Flexo-Coil Wiring Kit # RM-15267 for your 2019 Jeep Wrangler Rubicon but I don't believe you will connect to the same color wires as shown in the linked video for this kit on a 2017 Wrangler Unlimited. From what I could find I believe that the running light should be a white and gray wire on your driver's side but a white and orange wire on the passenger side. The stop/turn signals should be found on the yellow wire for the driver's side and the...
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  • Wiring Connections for Hopkins Endurance on a 1997 Dodge Ram 2500
    According to my research the wiring for your 1997 Dodge Ram 2500 are for the following functions: Black/orange - Tail/Running Red/Tan - 12V Power Green/Red - Left Turn/Stop Brown/Pink - Right Turn/Stop Light Blue - Trailer Brake Purple/Black - Reverse Black - Ground This means that if you are installing the Hopkins Endurance Quick-Install # HM47210 you will want to connect the wiring from your Dodge Ram to the following wires on the Hopkins Endurance: Black/orange - Brown Red/Tan - Red Green/Red...
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  • Trailer Brakes Intermittently Turn On While Driving without Using Brake Pedal or Manual Override
    It is possible that there is a short somewhere that is intermittently kicking in due to vehicle/trailer position changes as you drive. The likely culprits are the trailer connectors on the vehicle and trailer. You will need to make sure that the connectors are clean and free of corrosion inside and out. To test the controller use a circuit tester such as # PTW2991. Sever the blue wire a few inches from the back of the controller and test the end coming out of the controller while fully...
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  • Trailer Brakes Will Not Lock Up with Primus IQ Brake Controller # TK90160 in 2007 Silverado 1500
    The fact that your trailer brakes will not lock up at 20-25 mph speed does not necessarily indicate a problem with the brake controller. The best way to isolate the problem is to apply a circuit tester to the wires leading into one of the trailer electric brake assemblies to read the voltage reaching the brake. You can use a voltage tester like # PT89ZR to read the voltage being delivered to the brake assembly. You should read +12 volts or very close to it at each brake when the controller...
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  • Using Tail Light Convertor 118158 for a Third Brake Light and it Will Not Light Up
    Make sure that the tail light converter, # 118158, is properly grounded to a clean and corrosion free bare metal surface and do the same for the third brake light. Without a good proper ground the circuit cannot be completed. If this does not help then we need to do a little testing. First, disconnect the trailer and use a circuit tester such as # PTW2991 to test the vehicle side trailer connector just to make sure everything is working on that end. Next make sure the vehicle side and...
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  • Brake Controller Error Message with 2012 Dodge 2500 4x4 Towing 2002 4-Star Horse Trailer
    The problem you describe of your brake controller displaying an error message when your tow vehicle lights are turned on suggests several possible causes. One potential cause is damage/corrosion in the trailer connector(s) that could be causing two separate circuits to be bridged. It can happen that corrosion in a connector can actually create an electrical connection between two adjacent circuits, in this case the brake circuit and the running light circuit. Another possibility is that...
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Do you have a question about this Electrical Tool?


Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Dustin K
Video Edited:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee Brent H
Installed by:
Brent H
Employee Mary K
Written by:
Mary K
Employee Zach D
Video by:
Zach D
Employee Erin H
Updated by:
Erin H

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