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Discussion Starter #1
How can you tell when one of these cartridge type fuse's go bad? Replaced on last night that was suppose to be good, when I put a replacement in, that worked?
 

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Ohm it with a meter.

Edit:
The other way depending on the circuit. If one side has 12V the other must as well otherwise its blown but depends on the application since the circuit could be dead until something else is turned on within the TIPM. Ohming the fuse out of the PDB is the best way to verify it is actually good.
 

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Discussion Starter #3
Ohm

In other words, you cannot see anything wrong with the fuse unless to check it with an OHM meter, makes sense. Thought maybe you could see a break in the connection inside the fuse its self:



Ohm it with a meter.

Edit:
The other way depending on the circuit. If one side has 12V the other must as well otherwise its blown but depends on the application since the circuit could be dead until something else is turned on within the TIPM. Ohming the fuse out of the PDB is the best way to verify it is actually good.
 

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They don't necessarily blow in a way you can see it. Hence you'll always need to meter a fuse as part of trouble shooting to be certain it is good in the affected circuits.

Also replacing a blow fuse always brings to mind the question of what caused this since there is a good margin for normal operations and they typically will never blow.
 
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