Could you use it in the same way except using the test light to trigger the ground wires? My ford focus has a +ve common and 2 ground wires that are used to trigger
Very nice, my question is how does the transistor in the COP does not get destroyed with the 12 Volt ? A last question, how can I trigger 2 wire ignition coil , can just supply the negative wire with a ground ? Thanks in advance.
@@renejacques8288 He states the test light is hooked up to B+ and is reduced voltage. Ignition on. And this is the state B+ should be in until the computer opens the switch to collapse the field in the secondary winding. Since the car isn’t running, the primary (B+) will remain closed with reduced voltage available to the test light.
@@wdtony I thought B+ was pos + of the battery and as such is a constant 12v, and the switch the computer uses is 4v, yet he's hooking a direct 12v to the 4v trigger wire.
No, you are acting as the ECM by tapping backprobed trigger wire. All this test tells you is if the coil is good or bad and if you have power and ground at the coil.
Hey! This seems like a quality video with some great information. Unfortunately, I don’t know enough to really understand what is going on. I am particularly interested in the solution for the Corolla. Are you able to link the diagram for the coil-over-plug(COP) that you showed in the video? What does backprobing do? What type of clip are you using to ground the spark plug? You mention that you have the test light hooked up to B+ while touching the tip to the engine block, is this the same B+ that you mentioned is a part of the COP circuitry; does that mean the other end of the test light is already hooked up to the B+ on the pack or is there another B+?-I’ve not used a test light before, is there a standard or would I need a particular one, are you able to provide a link to the one you are using in the video? Thank you for your time and for making this video!
Austin Lowther it’s connected to the battery positive. The test lightbulb reduces the voltage to a safe level as you’re working on a 5v ECU circuit. When he touches the engine with the tip it completes a 12v circuit to turn the test light on as the engine is an earth point (connected to battery negative)
@@kongwu482 It also doesn't have any threads and looks like it was cast that way, not just had them ground off. Pretty sure it's a specialty tool, would be nice to have.
"test light hooked up to big plus, we'll use the reduced voltage" what does that mean, does he mean he hooked the test light to the positive on the battery and if so why would that be reduced voltage....so confused!
gagnant 4 its reduced voltage because he uses an incandescent test light. If you stick a jumper wire from battery positive there would probably be some fire works. The test light is a very useful tool. Almost broken wires can show 12v on a multimeter however they do not carry enough current (amps) to light an incandescent. Its because of the resistance of the bulb inside the test light.
He’s connected his test lite to the battery positive post(12volts). The incandescent bulb in the test lite reduces the voltage from the battery positive post (12 volts) down to 4 volts which the Toyota uses as trigger voltage. As Liam stated, the resistance in the test lite bulb is what reduces the voltage. Hope this helped.
It would depend on what type of ignition system the 90’s car uses. This test was just for the smart coil systems on late model engines. You can trigger some ignition systems with electric drills or soldering guns when they are placed next to the reluctor.
Thank You, Garage Gurus. Made my day easier for my pops GMC truck.
So do you mean..we hve to find the trigger pin in the coil circuit? And connect it with positive from battery to trigger? And just turn on thecar?
Never use a wire to do this. You have to use a test light.
Where can I get that metal clamp?
Could you use it in the same way except using the test light to trigger the ground wires? My ford focus has a +ve common and 2 ground wires that are used to trigger
my dear sir!! same technique works with the three wires connector??? I hope you will reply .
Which wire you triggering the signal wire,and are you sending a ground or current to trigger it?
Good videos ! 👍🏻
Very nice, my question is how does the transistor in the COP does not get destroyed with the 12 Volt ? A last question, how can I trigger 2 wire ignition coil , can just supply the negative wire with a ground ? Thanks in advance.
Φίλε
Όπως είδες αυτός χρησιμοποιεί ένα δοκιμαστικό κατσαβίδι έτσι δεν είναι 12 volt
Επίσης όπως είδες μόνο το ακουμπά λίγο
Φίλε
Εδω μπορείς να δεις πως γίνεται ο έλεγχος σε πολλαπλασιαστη με 3-καλωδια
th-cam.com/video/PpofMV7DAow/w-d-xo.htmlsi=WvsUU_dB12q3umKK
You have to first figure out if it's ground side triggered or positive side triggered.
If you have test light connected to battery positive isn’t that giving the trigger 12v instead of 4v and burn out ecu ?
If he wanted to apply 12 volts to the T-pin, he would just use a wire. He's using a test light to drop the voltage from 12 volts to about 5 volts
Very helpful demo with wireing diagram . and very good experience easy to test the coil fireing👍👌🕺🔧
where can i get a test spark plugs or you just use any spark plugs? What's the clipping thing that you clip to the ground bolt and where can i get it?
K D tools amezon🕺🔧👍👌
You can use a simple sparkplug, you must change the opening
Thanks for your video. Does this method work for BMW 525I 2004? It has 3 wires. Is the test light voltage as same as the trigger voltage?
I don't think bmw coils have built in ignitors
Wondering the same with a BMW X5 with the same motor as yours
by B+ you mean positive terminal? How do you get the voltage reduced to 4V?
I believe the computer reduces the voltage to the primary coil.
@@wdtony I think he did a direct feed from battery, consequently the computer would be bypassed
@@renejacques8288
He states the test light is hooked up to B+ and is reduced voltage. Ignition on.
And this is the state B+ should be in until the computer opens the switch to collapse the field in the secondary winding. Since the car isn’t running, the primary (B+) will remain closed with reduced voltage available to the test light.
@@wdtony I thought B+ was pos + of the battery and as such is a constant 12v, and the switch the computer uses is 4v, yet he's hooking a direct 12v to the 4v trigger wire.
@@renejacques8288
B+ is reduced voltage from ECM, not battery.
Which color indicates the trigger wire?
@Garagegurus does that mean its getting signal from the ecm and wire is not broken
No, you are acting as the ECM by tapping backprobed trigger wire. All this test tells you is if the coil is good or bad and if you have power and ground at the coil.
What is the wire you put paper clips in ?
How do you test glow plugs on Asian cars and trucks let me know thanks
Great video, saved me a lot of money.
Very nice video and informative ❤
If it doesn't fire be sure to verify the low reference ground.
AWESOME video thank's so much!
Which battery terminal did you put the clip end of the test light to?
Battery positive
when you say trigger, is that wire going back to computer?
Yes, the trigger wire goes to computer
U guys Are doing very good tremendous job for we students may ALLAH BLESS YOU ALL HAVE NICE DAY
how to identify the trigger wire??
ignition system schematic for your vehicle
Love it. Thanks you!
Great tip! Thank you!
Hey! This seems like a quality video with some great information. Unfortunately, I don’t know enough to really understand what is going on.
I am particularly interested in the solution for the Corolla.
Are you able to link the diagram for the coil-over-plug(COP) that you showed in the video?
What does backprobing do?
What type of clip are you using to ground the spark plug?
You mention that you have the test light hooked up to B+ while touching the tip to the engine block, is this the same B+ that you mentioned is a part of the COP circuitry; does that mean the other end of the test light is already hooked up to the B+ on the pack or is there another B+?-I’ve not used a test light before, is there a standard or would I need a particular one, are you able to provide a link to the one you are using in the video?
Thank you for your time and for making this video!
Austin Lowther it’s connected to the battery positive. The test lightbulb reduces the voltage to a safe level as you’re working on a 5v ECU circuit.
When he touches the engine with the tip it completes a 12v circuit to turn the test light on as the engine is an earth point (connected to battery negative)
Thank you so much
Legendary 👍👍👍💪
Does it matter LED test light or incandescent test light?
No
Yes 🤦
Great thanks
Nice Video
What you were using as a ground for a test spark plug ?
lol its in the video. a bolt thats on the engine.
@@SuperHtownswag not just a bolt, i saw there's clip but I don't think spark plugs would have that clip, is there?
@@kongwu482 It also doesn't have any threads and looks like it was cast that way, not just had them ground off. Pretty sure it's a specialty tool, would be nice to have.
You get this tool in amezon kD tools🔧🕺👍👌
@@Morgan_Sandoval th-cam.com/video/hJ8fu61wjEs/w-d-xo.html
"test light hooked up to big plus, we'll use the reduced voltage" what does that mean, does he mean he hooked the test light to the positive on the battery and if so why would that be reduced voltage....so confused!
gagnant 4 its reduced voltage because he uses an incandescent test light. If you stick a jumper wire from battery positive there would probably be some fire works.
The test light is a very useful tool. Almost broken wires can show 12v on a multimeter however they do not carry enough current (amps) to light an incandescent. Its because of the resistance of the bulb inside the test light.
He’s connected his test lite to the battery positive post(12volts). The incandescent bulb in the test lite reduces the voltage from the battery positive post (12 volts) down to 4 volts which the Toyota uses as trigger voltage. As Liam stated, the resistance in the test lite bulb is what reduces the voltage. Hope this helped.
@@tboneproductions2453 how to find trigger wire on corolla?
Took me a second to figure out what B+ meant. Why not just say hook it up to the positive terminal?
Because that's the terminology Toyota uses
ya one can hv a spark with no load. put a load on engine then see. there is a difference .Im suprised these tech don't do that
some many damn questions on this video... ridiculous!
COOL VIDEO .
Where is b+ ?
Battery/ positive
Jijiji right on top of battery ÷
Wow
Atoz car teste
Can this technic work on 1990s car?
It would depend on what type of ignition system the 90’s car uses. This test was just for the smart coil systems on late model engines. You can trigger some ignition systems with electric drills or soldering guns when they are placed next to the reluctor.
Nissan 240sx or any japanese cars. Instead of cranking engine, there must be another way to test spark at ignition coil.