Love these kinds of stories and feedback. This is all the payment I ever need. Thank you so much! Proud of you man.

As Erick O would say when reaching for his test light… “ let me grab the ol scope on a rope “ lol. Honestly once you understand the capabilities of a test light that’s not the LED with display junk they try to peddle that all new techs get conned into buying when they step onto a tool truck I’m guilty of this too, and get a incandescent 200 ish ma test light you can literally diagnose and verify potential repair with nothing but a 30$ scratch awl with a cord hanging off of it lol

That's awesome man, that you're an electronics tech. Really appreciate this comment my friend.

Yup. Depending on the job. What would Scanner Danner do? Or what would Ivan do? Over at pine hollow

You are welcome!

Thank you so much Tracy! Mom is doing great!

😇@@ScannerDanner

Depends on the switch circuit. They're not all built the same

Thank you Chris!

It's a different world for sure (ac voltage and residential electrical) I'm always asking my electrician friend questions 🙂

Thank you so much!

I'm not sure either my friend. Something with the bell icon. You can select different setting with that

Any scope is better than no scope!

You are my OBJUAN KNOBE, My only hope. I drive an 18 wheeler. The local shops don't fix electrical problems and the stealership wants 2500 to start working on the truck. I use the strategy that you teach to work on the truck. Thank you Bro

To much to put into a text message. Sign up for SD Premium on my website, take advantage of the 14 day free trial. Cancel before the 14 days are up and you won't be charged and start in my Chapter 2 "switch inputs" playlist. You'll be glad that you did! www.scannerdanner.com/join-scannerdanner-premium.html Hope to see you there

@davemall1 Pull Down: Switch Open 0v. Switch closed 12v Switch is on power side of circuit.... Pull Up: Switch Open 12v. Switch closed 0v. Switch on ground side of circuit. Hope this helps!

@@12brmien that is completely opposite of how I teach it. I've never taught it from the internals of the module. I understand a "pull-up" resistor is used on what I'd call a pull-down circuit, but I don't care, what does the switch do? It pulls it down! What do we see as technicians? The switch, and what it is connected to! (a ground). If I'm going to use my test light and do what the switch does, I need to think about what the switch is doing! It's pulling it to ground. So what polarity does my test light go to? Ground! To teach this as a pull-up circuit, just adds unnecessary confusion. I realize others take issue with me on this, but I don't care. So I tell my students that a pull down circuit is internally sourced by the computer and the switch pulls it to ground. Switch open, voltage is high, switch closed, voltage is low. It makes WAY more sense when taught this way.

​@@ScannerDanner teaching it this way might help your students understand what happens, but it is not correct when looking at computer logic and pull up and pull down resistors. The confusion is on what UP means. Up means the high voltage out of 2 possible outcomes, Down means the low voltage. It is a HIGH state or a LOW state, Not floating. On a MAF circuit there is a pull up resistor internal to ECM. It is only called UP because of the HIGH state the voltage is after the resistor , if the circuit to the MAF were disconnected. I would stay away from the term PULL up or DOWN, because of the confusion, and stick with the voltage drop explanation. A search on Pull up and Pull down circuit design is well established. Your other videos on the multimeter testing basics and the water hose analogy make the most sense.

@@danieljurgill1681 what does the switch do in this case? It switches to ground, it literally pulls the voltage down. To teach that this is a pull-up circuit because it has a pull-up resistor inside of the computer is counter productive. My understanding of the circuit, what it does, how to test it, where the voltage is coming from, is not affected by the term I choose to call it and teach it.

From my website at www.scannerdanner.com Get the eBook first, I offer a full refund if you're not happy with the content or format. Then I also offer exchanges toward the paper copy if you would prefer that. Thank you! Email us at support@scannerdanner.com if you have any issues. My wife and I handle our customer support personally

Switch input signals can range anywhere from 5v to system voltage

I believe so, yes

There are variables to your question. A fuel pump inertia switch can be on the control side or load side of a fuel pump relay. But in either case, it is a current carrying switch, NOT a switch input that carries microamps like im showing in this video. Also for an intertia switch, regardless of location, if you were to use a test light, that would limit current flow through the circuit. So it wouldn't work at all on the load side of the pump circuit, and may or may not work on the control side of a relay. Use a jumper wire if you want to bypass an inertia switch and just jump the two terminals together. Hope that helps.

If you don't like it, you'll never put the time in you need to be good at it. If you like it, I can teach you, but you need to be watching my classes, not just clips of classes here on KZfaq.

Give me a break. I give you a 1 out of 10 for not knowing how valuable a test light is. What if you're using the jumper wire you said you'd use and you accidently ground the wrong pin? Also, you need some type of pin or point on the end of your jumper wire to contact the back of the terminal, so you'd make a jumper wire with a pin on the end of it right? Or just grab an incandescent test light 😂. Also direct battery ground is not necessary to use for this test on a circuit that carries microamps of current. Of course we make sure our ground is good but battery ground is not necessary here. This is a portion of a class and im focused on the bypass test itself. Also i showed the working switch AND the ground voltage. This wasn't a lesson on all the other variables, just the bypass test. You make a lot of assumptions about a 6 minute lesson on a bypass test.

@@ScannerDanner Good morning. I could have come off a lot less harsh. But, I stand my ground. lol, no pun intended. Accidentally ground the wrong pin… I just don’t understand that logic. What if I accidentally short the positive battery terminal to ground? What do you think is going to happen. I work on Freightliners, internationals, Peterbilt’s. They all have circuit numbers, SAE numbers on their wires, connector views can be easily attained, cavity numbers are on about 70% of the connectors I’ve worked on. Not to mention the color of the wire. There’s many failsafes to assure you don’t “accidentally” short the wrong terminal. Which is why I use terminal leads. Once plugged into the correct terminal, wiggling the wire on the other side reveals your in the correct hole as the terminal then wiggles too. I have a collection and the wire end is stripped off a 1/4” to apply a load or short other terminals to it. About 1” in a hole poke for my meter. The terminal goes into the signal wire and gets left there. Meter lead still attached. Other lead of the meter is attached to battery ground, can’t believe you have this much attention and can say use the cab skin for ground. Get another terminal and plug it into the ground and jump it to the other terminal. Now if the circuit is working correctly, reading milivolts. If the ground is open or corroded your reading closer to signal voltage. I’m guilty of not always using cab skin ground, I have a proven rock solid electrical background and understand if I’m using cab skin my readings could be off, but I’ll never shy anyone away from using battery ground. Wait wait wait, your telling me if you have 12 volts on your cab skin from a bad ground and you short your test light between it and your 11 volt signal, it will still work because Microamps of current. Well don’t you just turn water into wine with your magic test light. Because that isn’t working in real life. Battery ground. I could teach you a thing or two about closed circuit live voltage testing. It’s way better than shorting terminals with a test light or jumper wire. Most of my connectors are sealed so a bulky test light isn’t going to work. I was using MIG wire hammered down and ground small to sneak between the seal and connector, preventing seal damage. Not a fan of back probing sealed connectors but sometimes it’s required. As a trainer I bought a bag of terminal back probes and hammered and ground those down. I like that they are super bright yellow. MIG wire is still an excellent bag of tricks though. I have several oxy acetylene welded to 1/4 bolt heads for custom picks and back probes. You shouldn’t post videos like this out of context. It’s not helpful for young techs trying to understand electrical. I do have a test light buried away somewhere in my toolbox. It’s there in case I need a 1/4 amp load. Which I haven’t needed in years. I trust my multimeter because I know what I’m expecting out of it. Seen way too many techs get burned by a test light. It just boggles my mind someone with a huge fan boy following, probably makes a decent chunk of change from KZfaq and puts a video like this out.

I know many people like you. "I'm a master tech and I have the tools to prove it" lol Good for you. Then start making better videos and teach others! You work on 3 different models, I work on 40. There are many examples I can give you where you're jumper wire is going to get you into trouble and my test light will not! And it will be your fail safe, just in case. But your to stuck on your own ways to listen. So you do you and I'll do me. Also as smart as you are, you'd think you could listen a little better. In your first comment you are chastising me about the ground circuit. Watch this clip again, I mentioned the ground on two different occasions with the first time it begin shown with a voltmeter, with the circuit loaded! (Switch closed). @ 2:06 of the video and at 2:30 "we will cover more of that later" 🙄 And then the second time, when I showed the bypass test, it was mentioned again @ 4:03 Should we also include open and short circuit testing of the signal wire, and what an open ground actually looks like? How about what a shorted switch looks like and of course what a bad meter ground looks like? Guess what happens if my test light has a bad ground in this test? Nothing! The bypass test fails! IS that covered here? NO! I do all of that, just not here in this 6 minute video on Performing A By-pass Test! There was absolutely nothing out of context here and this clip still stands on it's own with no misinformation. So please do me a favor and take your know it all attitude elsewhere.

@@ScannerDanner yeah! I’ll keep on trying my friend, to make more content. It’s rough trying to explain something without weighing all the details. I was trying to make videos on my instagram. But my boss was like ya gotta stop. Company policy. I have however made over 4,000 posts on freightliner service solutions. Always trying to help someone out. That’s a crazy world. Making that many posts and comments helping people and I go to freightliner shops and the lead techs are always like thank you for what you do. But nobody knows what that like button is for there. Im just jealous of your professional content. If I could just figure out a way to share my knowledge, but my videos don’t get attention. I gotta do a better job. I’m sorry if I came off bitter. That wasn’t my intention. Just trying to point out helpful real life experiences. I’ve got 19 years under my belt, the last 9 have been with daimler trucks and kicking ass at electrical. Computer navigation and getting resources is a huge factor. To be able to say Ah well that FET opens at 6.7 amps and you’re pulling 7 amps, no wonder you have intermittent box lamps. But that’s a moving target as they gotta change their sites. Honestly I do appreciate the value of a low 1/4 amp load to apply to a pull down circuit. It is safer and a cool trick. I wouldn’t do it though. I’m a different breed. The industry is full of techs that claim they know better or are the best without backing anything up or teaching anyone anything. Could just be Chicago. .

@@ScannerDanner Hope your weekend is going well. Back to it. Literally the sixth sentence in my first comment explains the grounds. “You were so close…” I get it you said will cover more of that later. If anyone is acting like a know it all, it’s you AND me. We both have the same goals, to help techs out. 100%. This internet thing sucks. Full of videos of fails and people doing hack welding stuff. I thought for a moment this was following that trend by the context in the video. I’m sure in your class it was a spot on lesson. But out of context it’s cringe. Go ahead replace the switch if it still doesn’t work. Doesn’t sit right on me. I’d love some criticism on my videos. I’m trying to help, but nobody’s listening or responding. It’s driving me crazy. Then I see some idiotic video of someone spinning a flywheel at 10,000 RPMs with 2 mil views and 60k likes. Wtf! Hey Dan, I know I’m being stubborn and rude. I’m struggling and jealous. Thank you for your content and dedication. -Kyle