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fuse on positive battery terminal

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Old Sep 24th, 2018, 18:44   #1
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Default fuse on positive battery terminal

Hi. I have a volvo v70 D5 2008 R Design.

The car developed an unhealthy noise and I called out a mobile mechanic. A message came up on dash saying there was a charging failure service urgent. When he arrived the car would not start and he initially thought the engine had seized as he could not turn it over by hand, however he has diagnosed an alternator problem and we replaced the alternator with a new one. Still wouldn't start but engine moving freely by hand which it wasn't before.

After lots of testing why it wouldn't start we found that there was no voltage from the rear of the positive battery terminal. Basically there is a small fuse that has blown - when bypassed it starts and runs spot on. He hasn't come across this before but basically when the car is started then all works fine and current flows over the terminal but it will not start until it is bypassed.

Does anybody know anything about this please? What is it for and is it safe to bypass it. He has called Volvo and asked for a replacement fuse and they have said its not possible and the terminal connection needs replacing at a cost of 150 for the part.

Any and all advice really appreciated. Haven't yet received the bill but am sure the alternator isn't going to be cheap let alone the diagnostics.
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Old Sep 24th, 2018, 21:38   #2
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The fuse is there for a reason. It`s not to be bypassed. If you do, then carry a fire extinguisher. What do you think would have happened if the fuse hadn`t been there?
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Old Sep 24th, 2018, 21:54   #3
Black dog

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The alternator most likely shorted and the fuse blew saving the car!
2006 s60 2.4d currently @239.5k / work horse
1992 polo coupe / just for fun
1972 beetle fully restored
2011 v70 d3 resuscitated.
If I've offended you, good! That was my intention
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Old Feb 28th, 2019, 20:59   #4
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Last Online: Mar 1st, 2019 20:23
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Originally Posted by Thommykent View Post
The fuse is there for a reason. It`s not to be bypassed. If you do, then carry a fire extinguisher. What do you think would have happened if the fuse hadn`t been there?
What was the reason for the
fuse blowing? Any idea?
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Old Mar 1st, 2019, 17:28   #5
green van man
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The fuse did it's job, however 150 for a fuse is having a laugh. The car is basically a Ford Mondeo mk 4 so have a look for the fuse in ford bits on line. Even if it comes as part of the clamp the Ford part should be cheaper. If the fuse bit can be separated from the clamp they were not made as a unit and someone made the fuse so detective work should find a supplier. Try finding any identifying numbers on the part to help your search.
If you do find . supplier please let us know on here who it is as I'm sure the information will be useful.

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alternator, battery, ceramic, fuse, positive

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