Blown Fuse Inspection Service Points

INSPECTION SERVICE POINTS FOR A BLOWN FUSE

Inspection For Blown Fuse:

Remove the fuse and measure the resistance between the load side of the fuse and ground. Set the switches of all circuits which are connected to this fuse to a condition of continuity. If the resistance is almost 0 ohms at this time, there is a short somewhere between these switches and the load. If the resistance is not 0 ohms, there is no short at the present time, but a momentary short has probably caused the fuse to blow.

The main causes of a short circuit are the following:

^ Harness being clamped by the vehicle body

^ Damage to the outer casing of the harness due to wear or heat

^ Water getting into the connector or circuitry

^ Human error (mistakenly shorting a circuit, etc.)