How do you test a block fuse?
How do you test a block fuse?
Locate the small holes on each end of the blade-type fuses; those holes give you access to the blades inside the fuse. Insert the pointed tip of the red test lead first in one hole and then in the other. If you read 12-volts to ground on one end but not the other, the fuse is blown and needs to be replaced.
How to use a voltmeter to test a fuse block?
Clip the negative, black test lead to a good ground using the alligator clip attachment. Remember the car’s metal frame is one side of its electrical circuit. If you have a meter that must be set manually, set the meter’s “Function” switch to “DC Volts” and set the “Range” switch to a scale that will allow you to read 12-volts.
Can a test light be used to test fuses?
A test light won’t give you voltage readouts like a multimeter, but you can use one to quickly determine which fuses have power and which don’t. Make sure your test light is working before you start testing fuses so you can be sure you’re getting accurate results.
Where can I find a power fuse block?
There will also be a power fuse block located under the hood near the vehicle’s firewall. The blocks contain two types of fuses, the older “glass cartridge style” fuses and the newer “blade style” fuses. The blocks may also contain re-settable circuit breakers. Clip the negative, black test lead to a good ground using the alligator clip attachment.
How can I find out if my engine ground circuit is bad?
There’s some unwanted resistance in the ground circuit. To locate the problem, continue with the next steps. Move your meter’s red lead to the main ground terminal, engine end side. Have your assistant crank the engine while you take a voltage drop reading.
How to use a test light on positive and ground wires?
To check the ground, you first have to see if the circuit has electricity on the positive side. If yes, move on to examine the grounding point. Connect the clip end of the test light to the positive end and use the probing point to probe the ground wire of this circuit. An illuminated light indicates that everything is working fine.
What should all fuses make test light?
If the ignition switch is ON but the engine is not running, all the fuses should read about 12V or the test light should glow. The switch to turn things on is downstream of the battery and the fuse. Tail lights should be connected around the ignition switch directly to the battery so they can be turned on without the ignition being on.
Clip the negative, black test lead to a good ground using the alligator clip attachment. Remember the car’s metal frame is one side of its electrical circuit. If you have a meter that must be set manually, set the meter’s “Function” switch to “DC Volts” and set the “Range” switch to a scale that will allow you to read 12-volts.
There will also be a power fuse block located under the hood near the vehicle’s firewall. The blocks contain two types of fuses, the older “glass cartridge style” fuses and the newer “blade style” fuses. The blocks may also contain re-settable circuit breakers. Clip the negative, black test lead to a good ground using the alligator clip attachment.
