FIRST DRAFT

====== Troubleshooting electrical problems in the van ======


===== TL;DR =====

  * troubleshooting is more about methodical thinking than specific techniques, tools, or tricks
  * a multimeter is extremely useful and does not have to be expensive
  * carrying a few inexpensive replacement parts and tools can be helpful when attempting field repairs


===== before the problem occurs =====





==== noticing "normal" ====


There are at least two different kinds of //normal//.  Both are important to understanding how your system is misbehaving

=== normal for your system ===




=== normal according to the specs ===









==== taking inventory ====

=== hardware ===



=== software and settings ===


===== Houston, we have a problem! =====




==== what is actually happening? ====



==== when did it start? ====


==== is it repeatable and predictable? ====


==== where does it start? ====

We've come this far in the process and **this is our first attempt at doing what most people think of as troubleshooting** (testing with a multimeter).

=== multimeters ===



[[https://amzn.to/4cbQfqt|Multimeters]] are called such because they can make multiple measurements.  For our purposes we will use them most often to measure  **voltage** at different points of the system.  

For general purpose use even cheap meters will work.  Advanced users seem to prefer prosumer brands like [[https://amzn.to/3WzhfdU|Fluke]], but those users probably aren't reading this page.  :-)  
[YT video:  [[https://www.youtube.com/watch?v=SECWePatYjY|iFixIt Basic Skills - Multimeter]]] 

Note:  if you are buying a new meter it can be useful to [[https://amzn.to/3WyRlqM|select one with a clamp to measure current]].  Read the descriptions carefully;  **DC current** measurements are usually more useful for 'dwellers, but some models can only measure AC current with the clamp. Having both abilities would be preferable.  [I bought [[https://amzn.to/4fwcDxN|this one]] - secessus]
[YT video:  [[https://www.youtube.com/watch?v=G7BvKNfY6hk|Clamp Meter Automotive Measurements]]]






===== resources =====

  * YT video:  [[https://www.youtube.com/watch?v=dmEG5vuiFtA|Simple Troubleshooting on Board -  Ask The Expert with Nigel Calder]].  Nigel is from boatworld but his knowledge is transferable.