Power wire resistance question
#1
10-01-2011, 12:33 PM
Join Date: Jul 2011
Posts: 136
Likes: 0
Received 0 Likes
on
0 Posts
Power wire resistance question
Attatched is a diagram of the power wire. When I dont have the spades on that will connect to the air intake wires; it reads 4.59-4.6, which is fine. However when I put the spades on and take a reading it drops to the 3s. Any idea why?
Seems how all i would have to do it hook it up to my truck, and its reading in the 3's is it stil being effective?
I used the same resistor shown in the DIY video
Seems how all i would have to do it hook it up to my truck, and its reading in the 3's is it stil being effective?
I used the same resistor shown in the DIY video
#2
10-01-2011, 05:09 PM
I don't quite follow but think I understand anyways...
When you have it sitting on your bench, it reads 4.2, and when it's hooked up in your truck it reads 3.2..right?
Anytime your doing a resistance reading, the measurement will be different hooked up as compared to when it's not hooked up. You essentialy added series resistance which would add up, but there is internal Parallel resistance as well. When you combine the 2, depending on the initial values will indicate a different reading when coupled within the same circuit. Very hard to understand and explain unless you have Electronics experience. Overall, a lower or higher value hooked up is normal. You can't go by those values either as resistance should be measured when Not powered or hooked up. You wouldn't measure the resistance of a sensor when the pigtail is attached because of the said reason.
When you have it sitting on your bench, it reads 4.2, and when it's hooked up in your truck it reads 3.2..right?
Anytime your doing a resistance reading, the measurement will be different hooked up as compared to when it's not hooked up. You essentialy added series resistance which would add up, but there is internal Parallel resistance as well. When you combine the 2, depending on the initial values will indicate a different reading when coupled within the same circuit. Very hard to understand and explain unless you have Electronics experience. Overall, a lower or higher value hooked up is normal. You can't go by those values either as resistance should be measured when Not powered or hooked up. You wouldn't measure the resistance of a sensor when the pigtail is attached because of the said reason.
#4
10-01-2011, 07:05 PM
Anytime your doing a resistance reading, the measurement will be different hooked up as compared to when it's not hooked up. You essentialy added series resistance which would add up, but there is internal Parallel resistance as well. When you combine the 2, depending on the initial values will indicate a different reading when coupled within the same circuit. Very hard to understand and explain unless you have Electronics experience. Overall, a lower or higher value hooked up is normal. You can't go by those values either as resistance should be measured when Not powered or hooked up. You wouldn't measure the resistance of a sensor when the pigtail is attached because of the said reason.
Last edited by dirtydog; 10-01-2011 at 07:07 PM.