logic probe

[heman37]

hi all
i was wondering if the blue point CTS24 which is from snapon is the same thing as a logic probe? as i am taking a coarse in automotive technology and the teacher says that we will need a logic probe. as far as i can tell this is as close to one as i can find , if anyone has the right part number could you please let me know . thanks alot.

 

[daveblank]

If you have not already bought a probe, look into the Power Probe prodicts. The PP3 is a great unit.

 

[heman37]

is this thing computer safe? does anyone else here test fuel injectors with the blue point CTS24 ? the one that is at school has a red light and a green light and if we hook it up too a injector to see if the injector is working it looks to be a yellow color. thanks for any info on this probe

 

[rhandwor]

Look at the Waekon logic probes. I think they make them for the tool companies.
http://www.ntxtools.com/ Search vendors Waekon or type logic probes.
I have one plus a coil checker.

 

[heman37]

Thanks guys
this is the info i was looking for and yes it is computer safe. does the 6-24 volt systems.

 

[bgott]

I bought mine at Radio Shack, years and years ago.


On Edit: I went looking on Radio Shack's website for the model # and they don't seem to sell them anymore. Sorry!

 

[caper]

Our company bought every tech a blue point cts24 a few years back"because you have to have them now to work on newer vehicles".Out of twenty mechanics not one of us has ever taken it out of the box to do anything more than laugh about the money spent on something we didn't want or need.Have yet to find something I needed it for that I couldn't do with my multimeter.

 

[heman37]

forgive me as i am just getting into the trade , actually going to school, but how would you use a multimeter to test a fuel injector cycling, as from what i see .the multimeter would be to slow to see the cyling on and off to verify a injector is working. this is my thinking as to why someone would need a logic probe. explain how you could verify this and i am not gonna waste the money .

 

[Hawk321]

Ah fine...a PP3 topic...has anyone experience with this PP short circuit finder? Does it work?

 

[caper]

forgive me as i am just getting into the trade , actually going to school, but how would you use a multimeter to test a fuel injector cycling, as from what i see .the multimeter would be to slow to see the cyling on and off to verify a injector is working. this is my thinking as to why someone would need a logic probe. explain how you could verify this and i am not gonna waste the money .

Plug my noid light into the harness,see if it flashes,if so the wiring is ok,if the cyl has a misfire and I've already checked compression and ignition there's not much left but the injector.Most modern scan tools that I've dealt with also have power balance tests and injector flow tests which will help diag a bad injector as well.I'm not saying a logic probe is no good,I'm just saying in twenty years as a mechanic I've never seen anywhere that I HAD to have one to figure things out.As I said we have almost twenty techs here with them and they are all like brand new,most have never taken them out of the box.

 

[heman37]

what noid light should i get, and are they computer safe? the reason i am asking is i dont want to accidently inject 12v or 14v if the vehicle is running into a circuit like the computer that only take 5v or less. that is my thinking on the logic probe, what would be the best thing for me to get to test for shorts and find pos. and neg. wires and be computer safe ?

 

[caper]

Injectors run on 12v,unplug the injector and hook your test light in its place if you don't have a noid light kit.A decent digital multimeter will do just about anything you need for wiring diag on todays vehicles.It's got more to do with the operator knowing what the tool he has is capable of,and how to operate it than having some fancy tool that has limited use.I've never used a power probe but I don't see any readout for voltage other than a couple lights.If you have a voltage drop on a circuit what does a led tell you?Just knowing there is power or ground on a circuit can be misleading-How much voltage do I have?How much drop?As for using it to power up circuits I can do that with a jumper wire,and if you don't know what voltage your dealing with you should be in a shop manual finding out BEFORE you start diagnosing or applying power or ground.Your best bet is to find somebody who really knows what a DMM is capable of and get them to teach you about it.Fluke has some good discs that show different testing and how to do it.

 

[vssjim]

I don't use them either meter, scope or test light depending on the circuit I'm working on, just don't like the probes I know alot of people use them I just don't like them.

 

[heman37]

thanks Caper
this the kind of information that iam looking for, i just dont want to go out and get a hole pile of tools that i dont need , i think i will look for the fluke videos and do some research on how to use a DVOM proper and what applications i can use it for. It would also be handy to know how to do the basic testing when all the fancy tools die. thanks again