Short in wiring?
02-10-2018, (Subject: Short in wiring? ) 
Post: #1
Short in wiring?
I looked for a short in wiring harness and watched a video on youtube. The guy described a method that you disconnect the positive post of your battery. Then use a tester to see if the lamp lit when you attach the aligator head of the tester to postive post and the other end to positive cable you just disconnected fron positive battery post. If the light lit so there is a [/b]short and you check each fuse one by one to find the fuse that off the light.
Anyway I used this method on my truck. I disconnected all four positive battery posts. Then I saw the tester lamp light turned on when checked it between positive post and positive cable and light went off when negative cables that go to starter are detached from negative battery post.
Now the question is how is that possible?
I checked sll the cables that go from batteries to starter. Nothing unusual.
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02-10-2018, (Subject: Short in wiring? ) 
Post: #2
RE: Short in wiring?
(02-10-2018 )alborz Wrote:  I looked for a short in wiring harness and watched a video on youtube. The guy described a method that you disconnect the positive post of your battery. Then use a tester to see if the lamp lit when you attach the aligator head of the tester to postive post and the other end to positive cable you just disconnected fron positive battery post. If the light lit so there is a [/b]short and you check each fuse one by one to find the fuse that off the light.
Anyway I used this method on my truck. I disconnected all four positive battery posts. Then I saw the tester lamp light turned on when checked it between positive post and positive cable and light went off when negative cables that go to starter are detached from negative battery post.
Now the question is how is that possible?
I checked sll the cables that go from batteries to starter. Nothing unusual.

Well what exactly is going on? Sounds like the test your describing is a test for continuity
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02-11-2018, (Subject: Short in wiring? ) 
Post: #3
RE: Short in wiring?
Wouldn't the tester just complete the circuit and light up or blow the light every time?
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02-11-2018, (Subject: Short in wiring? ) 
Post: #4
RE: Short in wiring?
If your using a light tester for a 12v circuit, when you place the tester where you described then of course it'll light up. You made a simple circuit. Pos. post then the load then the neg.(ground). Your's is like this, 12v source(pos. post) connected to the little itty bitty light in the tester connected to the huge long battery cable that ends on the starter post(which is now acting as a ground for the itty bitty tester light). There is more than enough resistance in that big and that long of a cable to act as a ground for a little light bulb in a light tester.

With the ground post you have no 12v (pos) source. Its all grounds on both sides of the tester. Nothing there to light it up.

You may want to share the youtube video link so we can see what exactly they were testing and how.
Youtube is a great place to troll the ever living stupid out of society (tide pod challenge) and also home of the dumbest techs screaming they know what they're talking about when they very clearly don't.
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 Thanks given by: Rawze , Waterloo , hhow55





  
  
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