Pete the work that you are doing for the work is nothing short of amazing you are extremely clear when you talk and your knowledge is awesome. I've seen a lot of your vids
Dude, I wish I'd seen this a year ago before I deployed to Turkey and blew the fuse in my multimeter taking an amperage reading on a kc-135 fuel pump circuit. We couldn't get another fuse for almost 6 weeks! It only took a split second of not paying attention to blow that fuse.
Great training video Mr.Meier. by far you have some of the best training video on TH-cam. your video on reading electrical diagrams and understanding power n ground distribution wow that was great. I notice you use different (DMM) which ones are your favorite that you're using in your videos?
Mr Pete, little confused on the current analysis, you said if the pumps running freely you would have low resistance shouldn’t it be high current, you said low current . An you said if you had a restriction in the line or filter it would be high current, shouldn’t it be low current . Am I understanding this wrong? Your the Best love your videos
I'm referring to the amount of work the pump has to do. If there is no fuel being moved, it takes very little to get the pump spinning. If it is trying to push fuel past a restriction, it will have to work harder and that will require more current.
How can amps draw be related to figure out if there's no refrigerant since the a/c compressor is not driven by an electric motor and the electricity is solely used by the magnetic clutch to engage the compressor shaft to the pulley driven by the crankshaft...to me there's no correlation, am I wrong?
Watch the video again...we're not trying to measure the amount of refrigerant but if the refrigerant level is low, the ECM will not turn the relay on (along with other parameters it needs to see before allowing compressor operation). If that's the case, there will be no current flow through the control side of the relay.
Pete, I am confused. You go to the trouble of making sure the leads are plugged into the amp connection but then when you show the results of your test at 5:26 you are holding up your meter and it is set on volts and not reading amps but VOLTS and the leads are plugged into the volts connections. You even say seven POINT nine mili amps, which the meter is actually showing POINT seven nine volts not amps. Which should we use?
If you use the ammeter built into the DMM, you'll need to plug the red lead into the appropriate amp jack. The problem is not knowing how much current you might measure and if you exceed the limits of your meter, the internal fuse will blow and you could damage the tool. The marker you refer to is using a low amp probe to do the measuring. This tool converts current to a millivolt output the meter (or a scope) can read and display. And since it outputs a millivolt reading, we have to convert it to amperage using the conversion scale on the tool.
What's it mean if my fuse is hot to the touch? It's an older vehicle with the older fuses. I put my finger on the fuse and it feels hot. Does this mean I should check my grounds. And then my fuse is getting warm because of additional resistance?
Fuses are thermal devices and fail when the heat caused be current in excess of their rating melts the fuse strip. Measure the current in the circuit(s) that fuse protects to make sure they are working as they are supposed to.
Ground or neutral wire) sure makes me think he has not been to any good auto electrics course ,as they do not use the ground term or power wire the neg and positive side flow current ,and in that order
2000 jeep cherokee,,, if i try to bridge over my ac clutch from the high pressure switch to kick the clutch in but it will blow the big 20 amp ac fuse under the hood and doesnt kick the clutch in. rpms rise a little but clutch dont kick in .Does the same thing if i try to bridge over from the ac relay from the fuse box under the hood. but i can run 1 wire from the ground wire on the ac unit to the hot post and it will kick it in that way but still wont take freon...
First, stop trying to jump things. This is an ECM-controlled system and you could very well blow your computer if you're not careful. The wire at the compressor is power to the clutch coil. With it unplugged, but the A/C commanded "on" and the engine running, is there power there? If not, then break down the circuit into two halves - the control side of the relay and the component side of the relay. Then watch this: th-cam.com/video/lEBKcyq3c10/w-d-xo.html
First off Thank you for your reply... Ok With the A/C controls in the on position, motor running and the ac unit unpluged I do have power on the plug coming from the compressor but no power on the plug coming from my wire harness. Only time that wire has power in when the ac compressor is pluged in. Is that the way it should be or should i have power on the plug coming off the harness...It;s showing power on both sides of the high pressure sensor. Is that right? low side switch has 4 inlets but i got 2 hot and 2 ground. Cking this with only a test light with my clip hooked to the neg term. So if you could please help me figure this out i would really appreciate it because o dont know much about the ac system and it;s oper. So Ya I need help. i cant afford to take it to a shop...O i could hear all the video for some reason.
Fuel, spark, air, compression and can’t forget timing something that goes overlooked many times. I can tell by how it cranks most times but the best way is with my 4channel Picoscope.
When dealing with any kind of motor, you have to include the effect load on the motor will have on current flow. That might work with the pump on the bench, but not if it's in the tank pushing fuel. Does that help?
![[LIVE] : ONE ลุมพินี 84 วันนี้!! คู่เอก "ก้องศึก vs เมืองไทย"](http://i.ytimg.com/vi/3kuzsAIDf1c/mqdefault.jpg)
Pete the work that you are doing for the work is nothing short of amazing you are extremely clear when you talk and your knowledge is awesome. I've seen a lot of your vids
Thank you!
Love the way you explain in detail!
What an amazing man. You are a superb teacher my man.
i'm getting better and better with Motor age. Great VIDEO!! Pete.
I always learn something with Pete.
Dude, I wish I'd seen this a year ago before I deployed to Turkey and blew the fuse in my multimeter taking an amperage reading on a kc-135 fuel pump circuit. We couldn't get another fuse for almost 6 weeks! It only took a split second of not paying attention to blow that fuse.
Should of got a turk over at the alley to repair that fuse for you.
thanks
Great stuff Pete. Thanks for all your experience.
Fuse socket connector manufactured by General Technologies Corp . are very handy to use . 6 PC. Set $20.00 Amazon 6/29/24 Thank You Pete !
Excellent training, thanks motorage.
that is sweet I work with electronics all the time even as an electrician for a bit, I had not seen the small gauge clamp on before.
Pete Meier motor age Good Afternoon take care and have a great day 👍
Good tutorial 👌 👍 👏 thank you
From Nick Ayivor from London England UK 🇬🇧
excellent video
Great info.
Great training video Mr.Meier. by far you have some of the best training video on TH-cam. your video on reading electrical diagrams and understanding power n ground distribution wow that was great. I notice you use different (DMM) which ones are your favorite that you're using in your videos?
My stand by was an older UEI that I've had for years. That finally gave up the ghost and died, so I'm on the lookout for a new one myself.
smiling sorry. when you find your new one can point me in that direction? you have new student love your training video's
Thanks, Mr Man…
Ohhh, u definitely need a multimeter on that dodge...🤣🤣
Can't imagine how many electrical problems that truck has...
GOOD INFO AS ALWAYS.
Thanks so much teacher
well I didn't know about the record and the min max, I bet I can use that for something, thanks.
Mr Pete, little confused on the current analysis, you said if the pumps running freely you would have low resistance shouldn’t it be high current, you said low current .
An you said if you had a restriction in the line or filter it would be high current, shouldn’t it be low current . Am I understanding this wrong? Your the Best love your videos
I'm referring to the amount of work the pump has to do. If there is no fuel being moved, it takes very little to get the pump spinning. If it is trying to push fuel past a restriction, it will have to work harder and that will require more current.
How can amps draw be related to figure out if there's no refrigerant since the a/c compressor is not driven by an electric motor and the electricity is solely used by the magnetic clutch to engage the compressor shaft to the pulley driven by the crankshaft...to me there's no correlation, am I wrong?
Watch the video again...we're not trying to measure the amount of refrigerant but if the refrigerant level is low, the ECM will not turn the relay on (along with other parameters it needs to see before allowing compressor operation). If that's the case, there will be no current flow through the control side of the relay.
Pete, I am confused. You go to the trouble of making sure the leads are plugged into the amp connection but then when you show the results of your test at 5:26 you are holding up your meter and it is set on volts and not reading amps but VOLTS and the leads are plugged into the volts connections. You even say seven POINT nine mili amps, which the meter is actually showing POINT seven nine volts not amps. Which should we use?
If you use the ammeter built into the DMM, you'll need to plug the red lead into the appropriate amp jack. The problem is not knowing how much current you might measure and if you exceed the limits of your meter, the internal fuse will blow and you could damage the tool. The marker you refer to is using a low amp probe to do the measuring. This tool converts current to a millivolt output the meter (or a scope) can read and display. And since it outputs a millivolt reading, we have to convert it to amperage using the conversion scale on the tool.
@@MotorAgeMagazine Oh okay that makes sense. Thanks for the clarification.
Great info thanks 👍
fantastic info, and the tool guy is obsolete now days... LOL
Amazing 🤩
👍 thanks!
nice job man
What's it mean if my fuse is hot to the touch? It's an older vehicle with the older fuses. I put my finger on the fuse and it feels hot. Does this mean I should check my grounds.
And then my fuse is getting warm because of additional resistance?
Fuses are thermal devices and fail when the heat caused be current in excess of their rating melts the fuse strip. Measure the current in the circuit(s) that fuse protects to make sure they are working as they are supposed to.
thanks ..!!
I did learn something .. :)
The fact that he uses the term power ( as in the power wire ) and ground (as in a A/C system
Ground or neutral wire) sure makes me think he has not been to any good auto electrics course ,as they do not use the ground term or power wire the neg and positive side flow current ,and in that order
He has the meter set too volts and the red led is in the ohms-volt port and the screen shows Amps.
2000 jeep cherokee,,, if i try to bridge over my ac clutch from the high pressure switch to kick the clutch in but it will blow the big 20 amp ac fuse under the hood and doesnt kick the clutch in. rpms rise a little but clutch dont kick in .Does the same thing if i try to bridge over from the ac relay from the fuse box under the hood. but i can run 1 wire from the ground wire on the ac unit to the hot post and it will kick it in that way but still wont take freon...
First, stop trying to jump things. This is an ECM-controlled system and you could very well blow your computer if you're not careful. The wire at the compressor is power to the clutch coil. With it unplugged, but the A/C commanded "on" and the engine running, is there power there? If not, then break down the circuit into two halves - the control side of the relay and the component side of the relay. Then watch this: th-cam.com/video/lEBKcyq3c10/w-d-xo.html
First off Thank you for your reply... Ok With the A/C controls in the on position, motor running and the ac unit unpluged I do have power on the plug coming from the compressor but no power on the plug coming from my wire harness. Only time that wire has power in when the ac compressor is pluged in. Is that the way it should be or should i have power on the plug coming off the harness...It;s showing power on both sides of the high pressure sensor. Is that right? low side switch has 4 inlets but i got 2 hot and 2 ground. Cking this with only a test light with my clip hooked to the neg term. So if you could please help me figure this out i would really appreciate it because o dont know much about the ac system and it;s oper. So Ya I need help. i cant afford to take it to a shop...O i could hear all the video for some reason.
@@kevinferrell1739 Is there only 1 wire going into the compressor?
Alternator
cool.!!
Actually you need 4 things, fuel spark, compression and air. Which without air there won't be any compression... just sayin.
Fuel, spark, air, compression and can’t forget timing something that goes overlooked many times. I can tell by how it cranks most times but the best way is with my 4channel Picoscope.
where did you get those little adapters you connected to the inline fuse holder so it can fit where the fuse goes ?
+Alejandro Amaro Those are from PICO but you can find Fuse Buddies at AESWave.com too.
could you reference the pumps ohm's value and circuit voltage to calculate amps? (ohm's law)
When dealing with any kind of motor, you have to include the effect load on the motor will have on current flow. That might work with the pump on the bench, but not if it's in the tank pushing fuel. Does that help?
Motor Age yes, thanks for your fast reply, Happy New Year
I=E?R
Too long explanation - get to the point ! Explain that in 5 minutes!
really shit