How can you tell if a relay has a blown fuse?
How can you tell if a relay has a blown fuse?
If voltage is able to flow through that side of the relay, move on to the 87 connection point and determine if battery voltage is present there. If it isn’t, that also suggests a blown fuse or circuit breaker. Checking the connection points in the fuse box with a multimeter will confirm if battery voltage is available at the relay terminals.
How do you check for a faulty relay?
The only tool required to check a relay is a multimeter. With the relay removed from the fuse box, the multimeter set to measure DC voltage and the switch in the cab activated, first check to see if there are 12 volts at the 85 position in the fuse box where the relay plugs in (or wherever the relay is located).
Where is the relay located in a car?
The relay is typically located in a place where larger electric parts are placed. In a car, this is likely a relay or fuse box. Use your fingers to unplug the relay from the socket in which it is placed. Note the relay position. The positioning and polarity of relays and fuses should be printed on the inside of the relay box or fuse box cover.
Can a fuse be replaced on a relay?
Doing this is also an efficient way to make an emergency repair that will allow you to get the machine back to the yard until the relay can be replaced. Remember, a relay is not a fuse; there will still be a fuse to protect the circuit.
The only tool required to check a relay is a multimeter. With the relay removed from the fuse box, the multimeter set to measure DC voltage and the switch in the cab activated, first check to see if there are 12 volts at the 85 position in the fuse box where the relay plugs in (or wherever the relay is located).
If voltage is able to flow through that side of the relay, move on to the 87 connection point and determine if battery voltage is present there. If it isn’t, that also suggests a blown fuse or circuit breaker. Checking the connection points in the fuse box with a multimeter will confirm if battery voltage is available at the relay terminals.
The relay is typically located in a place where larger electric parts are placed. In a car, this is likely a relay or fuse box. Use your fingers to unplug the relay from the socket in which it is placed. Note the relay position. The positioning and polarity of relays and fuses should be printed on the inside of the relay box or fuse box cover.
Doing this is also an efficient way to make an emergency repair that will allow you to get the machine back to the yard until the relay can be replaced. Remember, a relay is not a fuse; there will still be a fuse to protect the circuit.
