What's wrong with this picture? - Page 1
Forum section: electronics / general

author: Skimask
author_rank: Super Contributor
timestamp: May 07, 2016, 09:16:21 pm
content: Friend of mine who claims to be an electronics expert because he's made blinky on an Arduino couldn't figure this out...with the part in one hand and the meter in the other.(And yes, red is plugged into red, and black is plugged into black)

author: AF6LJ
author_rank: Unknown
timestamp: May 07, 2016, 09:22:04 pm
content: Besides the fact the diode appears to be shorted....

author: Bud
author_rank: Super Contributor
timestamp: May 07, 2016, 10:16:24 pm
content: You do not measure resistance on buzzer setting

author: M4trix
author_rank: Frequent Contributor
timestamp: May 07, 2016, 10:53:49 pm
content: Quote from: AF6LJ on May 07, 2016, 09:22:04 pm+1Yep, she kicked the bucket !

author: Skimask
author_rank: Super Contributor
timestamp: May 07, 2016, 11:36:20 pm
content: Diode is from a remote start control brain box out of my '05 Vibe. Took it to the local body shop last year to get a door dent fixed. Shop called up a few days later saying car wouldn't start, asked if it was locked down (remote start, security settings, etc.). Nope. They towed it to a local garage, found the starter interlock fuse blown. Replaced the fuse. Blew immediately. Disconnected the remote start. Good to go. Didn't care. Didn't put the direct blame on the body shop. Cheapo Walmart remote starter installed when I bought the car. meh...whatever...Decided to pull the box last night and do a bit of troubleshooting. Found this gem on the 2nd diode I checked, which was after that friend of mine had a look around all the parts on the circuit board and determined it wasn't repairable.Replaced diode, reinstalled, Ops Check Good. Friend's mind = Blown...just like the diode...and now is thinking he's not so smart after all. No shit Sherlock. I ain't that bright either, but apparently I've got a shit-ton more common sense than the average idiot...meaning I know my limitations.Asked the owner of the shop today if they generally do welding on the car when replacing door panels. Yep they do. Told him what happened and the importance of good grounding while welding.While I still don't and won't place the cause of the blown diode directly on the welding that was done, sure seems mighty coincidental.Ceremony for the dead diode will be held later tonight at my weekly bonfire.

author: jitter
author_rank: Frequent Contributor
timestamp: May 08, 2016, 06:49:51 am
content: I would have thought the diode was a decoy and the real answer was that that BK Precision is not a "Tool Kit" but a DMM...Quote from: Skimask on May 07, 2016, 11:36:20 pmAh well, he's not the only one. Some people just don't use the right approach, i.e. not using common sense and making assumptions.QuoteCan you imagine frying the engine management could also have occurred? The last car shop I went to used a surge arrestor across the battery terminals when welding on a car.

author: Gyro
author_rank: Super Contributor
timestamp: May 08, 2016, 11:25:04 am
content: Quote from: Bud on May 07, 2016, 10:16:24 pmDepends on the meter, mine locks into the lowest resistance range so you can also see the resistance of the the 'short' (the buzzer coming on at several 10s of ohms).