Myself to my junior colleague..
'
I hope you've noted which wires went to which terminal
'
He replied..
'Oh sh1t...
...i cut them and instantly thought...gawld, i hope you know which went where'
A terminal had broken off a low voltage sensor (5V), it required a replacement which involves three wires being soldered...i'd gone to get the new sensor, when i got back...
...he's tried to be proactive and prepare things for me..
He's young and learning and it can be tough..he made a rash decision without thinking.
What was a 20 minute job turned into three hours of trying to find diagrams..unsuccessfully, trying to compare other machines...that had different colour wires, then chasing the cables back to their source then we were able to figure out the connections.
When we got it all back together...it wouldnt work
'You DID turn off the power before you cut those wires didn't you
?'
'
..yeah...i think so
'
'We'd better hope you havn't blown the PCB'
'No, surely it wouldn't, how could it ?'
'If you've shorted the live against one of the other wires, you could have sent voltage down a line it shouldn't, we're already up to £150 in sensors, the box/PCB cost circa £800'
We changed the box/PCB, no difference
...we tried ANOTHER sensor...it worked. We blew two sensors, the third was faulty.
'Don't worry bud, there's a lesson in there...ALWAYS make a drawing of ANYTHING you disconnect...ALWAYS make sure you've turned the power off when working....and don't worry, we've all made our mistakes, ive made mine, that's the trouble when you're working on unknown equipment with limited knowledge, made even more difficult by the fact the manufacturers dont have standard cable colours...and dont even make the same connections when they do use the same colours.'
STRESSSSSSS
Earlier, we'd been talking about how fast time goes.
He said...'Yeah, notice how you always
look back and think...where's the time gone ?'
Me..
'Wha ???. You can't look forward can you ?..that'd be like saying..Fcuk me,
next week just flew by
...where did it go ?'
Me...
Him..