Car electrical systems

In this part of my website, I aim to provide some insights into one of the more tricky parts of modern cars: The Car Electrical Systems, how to diagnose various electrical problems, and the tools recommended to diagnose them.

Content:

There’ll be more to follow soon!

*Fair warning:
Some of the pages may be written in Swedish, while others are in English, and even a Dutch page or two is anticipated. However, none of this should deter you from reading them, as a translation into your favorite language of choice is only a click away!*
*Waarschuwing:
Sommige pagina’s zijn mogelijk in het Zweeds geschreven, andere in het Engels, en er wordt zelfs een of twee Nederlandse pagina’s verwacht. Dit alles mag u er echter niet van weerhouden om ze te lezen, want een vertaling in uw favoriete taal is slechts een klik verwijderd!*
*Varning:
Vissa sidor kan vara skrivna på svenska, medan andra är på engelska, och till och med en eller två sidor på nederländska förväntas. Inget av detta bör dock avskräcka dig från att läsa dem, eftersom en översättning till ditt favoritspråk bara är ett klick bort!*

About me:

Back in the goodle days…
During all of the 80-ies, I worked as a tech in various car workshops in the Netherlands. In brand dealerships and in non-brand shops. I gave up this career to pursue a new career in IT, where I still work today. However, the interest in car tech and electrics always remained, and I’ve always tried to keep up with new developments in the industry. In the last phase of my tech career, I specialized in car electrics and electronics. Electronic systems such as fuel injection systems were just coming up, while electronic ignition systems were already more established. I planned to be a full-time car-electrics and electronics specialist. But I was a bit ahead of my time, and in the first group to graduate as car-electrician with micro-electronics. Hence, my shift to a new career in IT.

Fast forward to 2025…
As I recently picked up an online course on Advanced vehicle electrics, electronics, and diagnostics (Avancerad fordonsel, elektronik och diagnostik) at the Swedish Yrkes Högskola (Practical College), I’ll be writing about what I’ve learned and try to include practical examples. As such, this base page and the underlying pages will be completed and extended as I go.

If you’ve read these pages and found them interesting but would like to know more, please contact me with the link at the bottom of this page. Or perhaps you found an error, a typo, or just have a question about the content of this new part of my website. In any of these cases, please contact me.

 

Paul
Sweden
2025-08

*EN:
Any pages in a language that you’re not familiar with can be easily translated on the fly in your browser. In Chrome, do a right click and click the Translate to option. The translations may not be perfect, but do allow you to read the page in your own language.
*NL:
Pagina’s in een taal die u niet kent, kunt u eenvoudig direct vertalen in uw browser. Klik in Chrome met de rechtermuisknop en selecteer de optie ‘Vertalen naar’. De vertalingen zijn misschien niet perfect, maar u kunt de pagina wel in uw eigen taal lezen.
*SE:
Alla sidor på ett språk du inte är bekant med kan enkelt översättas direkt i din webbläsare. I Chrome högerklickar du och klickar på alternativet Översätt till. Översättningarna kanske inte är perfekta, men de låter dig läsa sidan på ditt eget språk.

#diagnosis #cardiagnosis #car-diagnosis #odb2 #odb-II #faultcode #ecm #bcm #felkod