Menu
Forum
General Car Audio
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Build Logs
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Home Audio
Off-topic Discussion
The Lounge
What's new
Search forums
Gallery
New media
New comments
Search media
Members
Registered members
Current visitors
Classifieds Member Feedback
SHOP
Shop Head Units
Shop Amplifiers
Shop Speakers
Shop Subwoofers
Shop eBay Car Audio
Log in / Register
Forum
Search
Search titles and first posts only
Search titles only
Search titles and first posts only
Search titles only
Log in / Join
What’s new
Search
Search titles and first posts only
Search titles only
Search titles and first posts only
Search titles only
General Car Audio
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Build Logs
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Home Audio
Off-topic Discussion
The Lounge
What's new
Search forums
Menu
Reply to thread
Forum
Car Audio Help
Wiring, Electrical & Installation
Measuring resistance?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="smoka" data-source="post: 7090415" data-attributes="member: 606721"><p>Not if you are troubleshooting a bad ground. I could get a wire the size of a human hair and it will read 0 resistance. But when you run a few amps through it the resistance will increase alot. An ohm meter will tell you the resistance measurement, but it will not tell you the quality or capacity of that wire.</p><p></p><p>When dealing with charging problems, just remember that electrons flow from neg to pos so you want to make sure you don't have any bottlenecks in your grounds.</p><p></p><p>If you want to properly check your grounds, here is what you do.</p><p></p><p>Play a sine wave or other constant sound at a medium level so you get some current flowing.</p><p></p><p>Take one lead from your meter to the pos of the batt. Take the neg lead (you will prob have to use an ext wire) and put the neg lead at several areas where you suspect there is a bad ground. Look for any voltage difference between the locations that you test.</p><p></p><p>Measuring voltage drop instead of resistance is the proper way to test for bad grounds.</p></blockquote><p></p>
[QUOTE="smoka, post: 7090415, member: 606721"] Not if you are troubleshooting a bad ground. I could get a wire the size of a human hair and it will read 0 resistance. But when you run a few amps through it the resistance will increase alot. An ohm meter will tell you the resistance measurement, but it will not tell you the quality or capacity of that wire. When dealing with charging problems, just remember that electrons flow from neg to pos so you want to make sure you don't have any bottlenecks in your grounds. If you want to properly check your grounds, here is what you do. Play a sine wave or other constant sound at a medium level so you get some current flowing. Take one lead from your meter to the pos of the batt. Take the neg lead (you will prob have to use an ext wire) and put the neg lead at several areas where you suspect there is a bad ground. Look for any voltage difference between the locations that you test. Measuring voltage drop instead of resistance is the proper way to test for bad grounds. [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Help
Wiring, Electrical & Installation
Measuring resistance?
Top
Menu
What's new
Forum list