Identifying Electric Short?
This is on a 2015 GMC Canyon but is really a generic question. There is a plate with non-replaceable fuses on top of the battery (see photo below). I would suspect this unit is quite expensive and onl...
Forum Discussion
Grumble Snabble Snarf...
These are not precision fuses rated for load. They are Armageddon grade replacements for fusible links, got it?
If the 300-amp fuse blows it's pretty self-explanatory that you have China Syndrome and that isn't subtle.
The smaller rated fuses can be worked around in order to test a circuit. Their actual operating amperage IS NOWHERE NEAR the fail value. Not even close.
Disconnect the smaller fuse circuit.
With a home-made 50-amp breaker, 10 gauge lead wires and crocodile grade jaw clamps, hook this IN SERIES with the breaker circuit you wish to test. Do not try this with a low battery. Nor try with a great load placed upon that circuit.
Testing needs to be done, one additive load at a time. If one particular circuit is on the ra... oops I mean malfunctioning, you'll find it in a hurry.
If the big momma fails you won't need a magnifying glass a Sherlock Holmes hat to find the problem. Connect a 50 watt 12-volt drop cord bulb and standard socket in series with the big breaker and when it goes out or gets really dim you've hit the jackpot.
The in-series 50 watt 12-volt drop light test will also work great for the other fuses too.
Simple CHEAP home-made testing at it's finest.
These are not precision fuses rated for load. They are Armageddon grade replacements for fusible links, got it?
If the 300-amp fuse blows it's pretty self-explanatory that you have China Syndrome and that isn't subtle.
The smaller rated fuses can be worked around in order to test a circuit. Their actual operating amperage IS NOWHERE NEAR the fail value. Not even close.
Disconnect the smaller fuse circuit.
With a home-made 50-amp breaker, 10 gauge lead wires and crocodile grade jaw clamps, hook this IN SERIES with the breaker circuit you wish to test. Do not try this with a low battery. Nor try with a great load placed upon that circuit.
Testing needs to be done, one additive load at a time. If one particular circuit is on the ra... oops I mean malfunctioning, you'll find it in a hurry.
If the big momma fails you won't need a magnifying glass a Sherlock Holmes hat to find the problem. Connect a 50 watt 12-volt drop cord bulb and standard socket in series with the big breaker and when it goes out or gets really dim you've hit the jackpot.
The in-series 50 watt 12-volt drop light test will also work great for the other fuses too.
Simple CHEAP home-made testing at it's finest.
