What are the factors which affect your skill in fault finding?

If diagnostic tool is not available in terms of troubleshooting in electronics truck fault finding may bit difficult

fault finding depends mainly on understanding how things work,

1 wrong  tools

2 inability to access  correct information

3 wrong diagnostic tool

4 lack of power

Good knoweledge of mechanical, electrical Background. Knoweledge of the System and Process. Step by step fault diagnostic. 

View of preview and following processes.

Good measuring devices may be helpfull.

Fault finding depends mainly on a major factor which is clear and detailed understanding of the construction and the working principle of the unit or equipment . Moreover, inputs and outputs of the unit or equipment.