I was using a KDR-M14A, but after replacing it with a KDR-M9S, it would no longer turn on, and since then neither one has powered up.
The customer realized that since neither unit was turning on, the problem was not with the products themselves, but with the power supply, so he came to our store.
I immediately measured the voltage and it was 12.6V (with the engine stopped).
However, this voltage is measured with the flow of electricity blocked, and is not a correct testing method.
When you measure it with a tester, you see 12V but the power won't turn on and the operation is unstable. This is because there is an abnormality in the voltage when a load is applied.
If you're just looking for a power source, this is fine.
However, troubleshooting requires a measurement method suited to the actual environment.
The voltage when the circuit is complete is 4V.
This is because when electricity flows through an electrical component, the amount of electricity (current) supplied is small, causing a voltage drop.
The natural voltage of the battery is 2.1V x 6 cells = 12.6V
The voltage rises to around 12.6V to 14.8V through generation by the alternator.
So why does the voltage drop even though the devices are connected in parallel?
It's easy to understand if you imagine this.
This is often used as an analogy when explaining voltage drop in customer service.
The battery can be assumed to be a dumb.
Even if the water pressure of a dam is 14.0V, if the water pipes are narrow, long, have many branches, or the amount of water used is large, the water supply cannot keep up and the water pressure in the pipes will drop.
This phenomenon causes a voltage drop.
The dam is full of water and the water pressure is 14.0V.
If the water main is shut off, the water pressure in the water main will read 14.0V.
However, if you release it, the water will flow away and the water pressure will decrease.
This is affected by the amount of water used in each household and the size and length of the pipes.
This time the cause was an electrical tap.
A blue tap is being used in a place where a red tap should have been used for this thickness of wire.
Since this was for a thicker wire, the wire's insulation had hardly been stripped, and the contact area was too small, which was the cause of the voltage drop.
To use a water pipe analogy, it would be like the gates being only slightly open.
Electrical taps are easy to use and are often used when installing electrical equipment.
Since there is a demand for one machine to be able to complete a lot of work, it can become a versatile item depending on the store's philosophy and the person in charge.
I try not to use taps on anything other than my own motorcycle or car because they are prone to poor contact in the winter and can cause other problems.
If you are able to do the wiring yourself, we recommend a tap as it is easy to use.
The wiring was branched out by crimping.
The contact area is also ensured when crimping, so there is no need to worry about voltage drop.
I would like to short-circuit the negative terminal with the body, but to be safe I will pull it all the way to the battery negative terminal.
The wiring is now complete and the cowling is put back on.
The Suzuki's cowling brings back memories, as it resembles the ZZ that I modified in high school.
Address 125
This is the Yankee's favorite car.
When you say mechanic, you think of someone who can do anything related to motorcycles and cars.
This may seem like a common theme, but each has their own area of expertise.
It varies from person to person, but the main categories are as follows:
Sheet metal painting
Electrical Equipment
Maintenance related
custom
Some people can handle one of them, but very few can handle them all.
Also, each vehicle model has its own strengths and weaknesses.
For work like Caedia's installation service, the type of car doesn't make much difference.
When it comes to troubleshooting, dealers have the advantage because specialized information and experience for that vehicle model is required.
In addition, there are many cases where a mechanic does not know the answer and it is necessary to call in a more specialized company.
On the other hand, it is common for dealers to specialize too much in certain car models and have difficulty handling models other than those that they handle.
In particular, please consider sheet metal painting as something separate.
In the automotive industry, many companies outsource tasks such as installing navigation systems and changing tires.
I have changed jobs and have some experience in sheet metal painting (FRP, sheet metal, painting), electrical equipment (starter, alternator disassembly and repair), and maintenance (various replacement work).
Customization is a hobby.
I have a wide range of experience, so I think I can be of help to you, but naturally there are many things I'm not good at.
If there's anything I can help you with, please feel free to contact me first.
