Also even if it was a bad ground it still could show 0v since it is connected by that wire. You basically tested if that wire was a good connection on the battery.
Thanks for making the video I've been looking for little tips and tricks and such to further my knowledge with wireing and such and that seems to be a great method of finding a ground. Also I've had an amp in my car for the past week that I haven't hooked up to anything cause I didn't know where to ground it but now I know how to find one thank you keep making more videos please
@imupabove isolate the part of the circuit you want to have a good ground and wire your dmm in parallel in on both negative components to voltage drop just the area you want to have a good ground. im sure they make extensions for a dmm somewhere
what if im trying to find a good ground for just my amps? how would i perform the test that way? my amps are located at the trunk and my battery is up front. thanks.
hi, have you got a earth going from the rear to the front of the car ? as the cars body is only as good as 4AWG due to the way the car is put together, so poinless having 0AWG power wire with no earth going the length of the car also.
If there's no active load on the circuit (amps off as in the video) then there'll be no current flowing from your ground point to the battery, and so a voltage drop test as shown here will always show 0 volts dropped.
nice video, but i have a question, i have to put the positive multimeter tip in the negative(bat) and the negative in the -(ground point) and i will get a value ???? thats ok? greetings and thanks :D
did you add that ground because it looks like a lead block the reason i ask is because i am running 2 amps one 1600 for mids and another 2000 for subs and once i installed the 1600 i started noticing my ground isnt good enough i was thinking of running another wire to the actual ground on my battery in the front is there an actual block you can buy that creates a ground?
So the genius says take one lead and put in on the negative but he connects it where there is a red wire which usually represents a positive not a negative. Im confused!
This was a fail. Reason being it doesn't have any current going through right now. But your close. Put one on back batt and the other on alt case. Put on peak hold or min max. Then play system full tilt should be less than 0.2v
I hacee a 1994 nissan sentraa.. nd i need to hook up my new ipod DUAL stereo.. nd i dk whereee my ground wiree goes behind thee stereo . plz message back .
you set it to DCVolt and you connect the lead into NEGATIVE terminal of the battery ?? OFCOURSE you will get BIG 0 Voltage. Voltage coming from POSITIF terminal of the battery dude. To test ground you should set the DMM to DC Resistance, if you want to test volatage drop, connect the lead to positif terminal of the battery and the negative to your ground point and DMM to DCVolt.
I check my big 3 ground and they are good. The problem is that when I started the car, put it on drive, turn the headlights on and the a/c( sound system off) my voltage drop to 12.2v. My battery resting, measure 12.4v....optima red top and stock 70amp alternator. I drive a '94 Corolla. What could be wrong?
ground to the bolt that holds the alternator to the motor, the alternators internals ground themself to the case of the alternator in theory thats the best ground on your car
@@jimdavidson5208 does it matter how long the ground cable is? got an amp in the back of the car, but no matter where i try i am stillg etting feed back, was wondering if the cable length affects the ground and wanted to try closer to the battery it self.
Nice job but faulty. You need to fully LOAD the circuit, THEN test for voltage drop. This video is great for a system that draws 0 amps. I think your fire hazard vehicle will surprise you UNDER load. Never ground to steel ANYTHING. Frame, chasis, trunk sheet metal and so on. Steel while clean is 30% worse than copper. Then a week later your steel body ground will corrode and take your ground down to 0%. Then comes the engine whine and cooked amps. Wonder why my amp died?? ............. Hello!!!!
G Man Exactly!!! What is the Solution! Where in the world does ANYONE Ground if you can't ground to anything steel🤔I think that as long as you are grounded and the surface is steel that you should make sure that you are applying plenty of Dielectric grease to a surface that is wire wheeled and cleaned up very well with a rough surface!!! Whallah👍
The negative side of the battery is connected to the chassis of the car. Making all metal parts connected to the chassis negative. So grounding means connecting to the negative side.
Also even if it was a bad ground it still could show 0v since it is connected by that wire. You basically tested if that wire was a good connection on the battery.
Thanks for making the video I've been looking for little tips and tricks and such to further my knowledge with wireing and such and that seems to be a great method of finding a ground. Also I've had an amp in my car for the past week that I haven't hooked up to anything cause I didn't know where to ground it but now I know how to find one thank you keep making more videos please
A good ground equals zero resistance and you look for the minimal amount of resistance to the battery
@imupabove isolate the part of the circuit you want to have a good ground and wire your dmm in parallel in on both negative components to voltage drop just the area you want to have a good ground. im sure they make extensions for a dmm somewhere
what if im trying to find a good ground for just my amps? how would i perform the test that way? my amps are located at the trunk and my battery is up front. thanks.
the case of the alternator is where the alternator grounds itself. if you ground on the case youll be gravy
can i measure this from putting one on the ground on the amp and the other where i want to ground to?
stop shaking the damn camera
hi, have you got a earth going from the rear to the front of the car ? as the cars body is only as good as 4AWG due to the way the car is put together, so poinless having 0AWG power wire with no earth going the length of the car also.
and if i don't have a battery in the back of my ride then what shall i test it from the amp?
If there's no active load on the circuit (amps off as in the video) then there'll be no current flowing from your ground point to the battery, and so a voltage drop test as shown here will always show 0 volts dropped.
Wrong killer. Go back to school.
where is that ground exactly on the right side behind the carpet?
nice video, but i have a question, i have to put the positive multimeter tip in the negative(bat) and the negative in the -(ground point) and i will get a value ???? thats ok? greetings and thanks :D
did you add that ground because it looks like a lead block the reason i ask is because i am running 2 amps one 1600 for mids and another 2000 for subs and once i installed the 1600 i started noticing my ground isnt good enough i was thinking of running another wire to the actual ground on my battery in the front is there an actual block you can buy that creates a ground?
Good Video! Hey, looks like you are using a single ground for multiple sources? No problems with that?
So the genius says take one lead and put in on the negative but he connects it where there is a red wire which usually represents a positive not a negative. Im confused!
your performing a voltage drop test on the ground side of your circuit
This was a fail. Reason being it doesn't have any current going through right now. But your close. Put one on back batt and the other on alt case. Put on peak hold or min max. Then play system full tilt should be less than 0.2v
We have a winner here folks. He's talking about LOADED circuits now. Tell them all about it again Clay.
i diddnt know pickles from death clock new how to find grounds!
so you set the dmm to ohms?
You couldn't possibly need more than one extra battery but okay
How about like most who have one battery up front and amps out back can ubadd a wire for extension for testing
I hacee a 1994 nissan sentraa.. nd i need to hook up my new ipod DUAL stereo.. nd i dk whereee my ground wiree goes behind thee stereo . plz message back .
you set it to DCVolt and you connect the lead into NEGATIVE terminal of the battery ?? OFCOURSE you will get BIG 0 Voltage. Voltage coming from POSITIF terminal of the battery dude. To test ground you should set the DMM to DC Resistance, if you want to test volatage drop, connect the lead to positif terminal of the battery and the negative to your ground point and DMM to DCVolt.
@Oeking87 look at my other vids. 4 15s in a wall
What subs you running with that Goliath?
Good stuff man. I'm debating on posting a vid like this. I made one but I didn't like it. Thumbs.up
Ok so ummmmmmmmmmmm what if battery is under hood like normal people cars ?
I'm still looking for a solution to this too.
Lmao
I see a nice GOLIATH sitting in there..:}
if you dont have a battery on the back of your car...use
COOL BRO NICE TIP
Did he say put the lead on a negative it appears he put it on the positive I see nevermind LOL
I check my big 3 ground and they are good. The problem is that when I started the car, put it on drive, turn the headlights on and the a/c( sound system off) my voltage drop to 12.2v. My battery resting, measure 12.4v....optima red top and stock 70amp alternator. I drive a '94 Corolla. What could be wrong?
The alternator
ground to the bolt that holds the alternator to the motor, the alternators internals ground themself to the case of the alternator in theory thats the best ground on your car
Best ground is at the - battery terminal directly. Go back to school.
@@jimdavidson5208 does it matter how long the ground cable is? got an amp in the back of the car, but no matter where i try i am stillg etting feed back, was wondering if the cable length affects the ground and wanted to try closer to the battery it self.
Carlos D.... what's wrong is you have an optima battery. You've been ripped off.
15 min north
im about 15 min north of chicago.
What part of chicago?
In Germany we call this "Cable-Salad" ... wtf
Every where else is called a fire hazard.
4 15" autotek atx1615 at 1 ohm. im saving up to do something else. prolly run it at .5
you ze man!
Rat nest
Nice job but faulty. You need to fully LOAD the circuit, THEN test for voltage drop. This video is great for a system that draws 0 amps. I think your fire hazard vehicle will surprise you UNDER load. Never ground to steel ANYTHING. Frame, chasis, trunk sheet metal and so on. Steel while clean is 30% worse than copper. Then a week later your steel body ground will corrode and take your ground down to 0%. Then comes the engine whine and cooked amps. Wonder why my amp died?? ............. Hello!!!!
You are 100% correct!
jim davidson ......so whats the solution then?
G Man
Exactly!!! What is the Solution! Where in the world does ANYONE Ground if you can't ground to anything steel🤔I think that as long as you are grounded and the surface is steel that you should make sure that you are applying plenty of Dielectric grease to a surface that is wire wheeled and cleaned up very well with a rough surface!!! Whallah👍
@@smigletat9634rue that also a simple coat of spray paint on the sanded down steel works great as well!!!
a spray of plasti dip over everything once connected and done is a great way to seal everything up.
so how are u supposed to do this without the convenience of a battery on the trunk?
That's what I'm wondering too!
jumper wire on your lead to - battery
.what is ground?
The negative side of the battery is connected to the chassis of the car. Making all metal parts connected to the chassis negative. So grounding means connecting to the negative side.
Something that eludes this guy in the video. And 99% of the commenters here on utube.
jim davidson Is that a good thing? Non-native speaker here.
Sloppy work