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Old 07-16-2018, 05:50 AM   #21
flybouy
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To expand on dmorgan64's comment: If you plug a 30/50 amp dogbone into a 30 amp outlet, the dogbone is designed to support 30 amps and no harm. If, on the other hand, you plug a 50/30 amp dogbone into a 50 amp outlet, then plug the 30 amp end into a 30 amp extension cord, plug that into a 50 amp service cord (which is protected by a 50 amp breaker in the trailer, the 30 amp section of the cord is not protected and can melt, burn or be destroyed if there is a draw greater than 30 amps inside the trailer. In other words, there are no safeguards to protect the "smallest" part of the cord, the 30 amp section. All of the circuit breakers are rated at 50 amps and that section of 30 amp cord can be overloaded with no properly rated circuit breaker protection.
Yup, in that scenario it would become a fusible link. Anyone who owed or worked on a Chrysler Corp vehicle in the late 60's -70's learned to curse at them.
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Old 07-16-2018, 06:34 AM   #22
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Yup, in that scenario it would become a fusible link. Anyone who owed or worked on a Chrysler Corp vehicle in the late 60's -70's learned to curse at them.
^ YES. I remember working on the 60s Fords. They actually made the fusible link look like any other wire in the wiring harness.
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Old 07-16-2018, 08:29 AM   #23
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Yup, in that scenario it would become a fusible link. Anyone who owed or worked on a Chrysler Corp vehicle in the late 60's -70's learned to curse at them.
That extended right on up to the 90s Dodge trucks. Had a 90 Ramcharger leave me high and dry in the middle of absolutely nowhere due to blowing one. Found the bundle and figured that's what it was but didn't bring a test light, meter....zip. Pulled it out of the mountains back to the nearest town (65 miles), got some test equipment and fixed it. And yes, over the course of that day I had a few choice words for the link...and the truck
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Old 07-16-2018, 09:09 AM   #24
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Back in the day, I had a 87 YUGO that I bought to go back and forth to med school. That entire wiring harness was one big fusible link..... That said, that YUGO was less reliable than the Hyundai's of the period, if you can imagine..... No thanks, I'm not a fan of fusible links (or YUGO's) !!!!!
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Old 07-16-2018, 09:45 AM   #25
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That extended right on up to the 90s Dodge trucks. Had a 90 Ramcharger leave me high and dry in the middle of absolutely nowhere due to blowing one. Found the bundle and figured that's what it was but didn't bring a test light, meter....zip. Pulled it out of the mountains back to the nearest town (65 miles), got some test equipment and fixed it. And yes, over the course of that day I had a few choice words for the link...and the truck
How about those resistors on the firewall that you didn't know expired until your points burned out or welded together from too high a voltage?
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Old 07-16-2018, 09:56 AM   #26
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Yup, today's vehicles require the computers at NASA to diagnose and fix. Anyone else use the tinfoil from a pack of cigarettes to wrap around a glass fuse to get home?
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Old 07-16-2018, 10:15 AM   #27
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Yup, today's vehicles require the computers at NASA to diagnose and fix. Anyone else use the tinfoil from a pack of cigarettes to wrap around a glass fuse to get home?
Hate to admit it but I used to have a short piece if 3/16" copper tubing in the toolbox. Put it in place of the buss fuse and quickly watch for smoke to locate the short/ground and take it out before anymore damage. Crude way of troubleshooting but hey it was the 50s and it worked.
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Old 07-16-2018, 10:27 AM   #28
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Yup, today's vehicles require the computers at NASA to diagnose and fix. Anyone else use the tinfoil from a pack of cigarettes to wrap around a glass fuse to get home?
I remember those days far too well.... On my 71 LandCruiser, I remember building a new fuel pump diaphragm from an old inner tube so we could get back home. Ain't doing that on today's trucks....

And the first part of your statement ties into another thread very well..... Those NASA computers can readily detect that "performance chip" that you took out of the ODB connector just before you took it in for that slipping transmission or missing engine....... There's not much hiding anything from the onboard computers when the mechanic can tell you how fast you were driving, the date/time you did it and how much fuel was remaining when you started decelleration.....
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Old 07-16-2018, 10:30 AM   #29
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Hate to admit it but I used to have a short piece if 3/16" copper tubing in the toolbox. Put it in place of the buss fuse and quickly watch for smoke to locate the short/ground and take it out before anymore damage. Crude way of troubleshooting but hey it was the 50s and it worked.

Ha! Now I like that kind of trouble shooting - the smoke test. Earlier this year while in FL my HWH stopped working. Ran it down to the tiny fuse on the control board indicating something on the board was faulty. Been a long time since I ran trouble at a component level on a circuit board, plus they were all covered in plastic, so took a jumper wire and put it across the fuse connectors....poof! the faulty diode just smoked under the plastic. Problem found - new control board was 2 1/2 hours away in GA.
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Old 07-16-2018, 10:50 AM   #30
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Ha! Now I like that kind of trouble shooting - the smoke test. Earlier this year while in FL my HWH stopped working. Ran it down to the tiny fuse on the control board indicating something on the board was faulty. Been a long time since I ran trouble at a component level on a circuit board, plus they were all covered in plastic, so took a jumper wire and put it across the fuse connectors....poof! the faulty diode just smoked under the plastic. Problem found - new control board was 2 1/2 hours away in GA.
Well I'll be Danny didn't think that sophisticated (think crude) method was still used.
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Old 07-16-2018, 11:28 AM   #31
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Well I'll be Danny didn't think that sophisticated (think crude) method was still used.
When the day is progressing, there's no hot water and DW WANTS hot water, and you're frustrated that a 1 yr. old hot water (I had just replaced it last year when the OE failed) heater has failed, and, I threw it away with a perfectly good control board, I was at the point in my frustration that I just wanted to see what "smoked"; hence my crude, but effective, trouble shooting method I could have just went to get the new board but I wanted the satisfaction of "seeing" the faulty component PAY for my inconvenience!
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Old 07-17-2018, 06:45 PM   #32
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When the day is progressing, there's no hot water and DW WANTS hot water, and you're frustrated that a 1 yr. old hot water (I had just replaced it last year when the OE failed) heater has failed, and, I threw it away with a perfectly good control board, I was at the point in my frustration that I just wanted to see what "smoked"; hence my crude, but effective, trouble shooting method I could have just went to get the new board but I wanted the satisfaction of "seeing" the faulty component PAY for my inconvenience!
Ah the price of revenge, I know it well....
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