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Frequently asked questions about cars and motorcycles

The Meaning of the HS and SH Codes on Fuses

Model: (Various brands) Various
Part: Fuse box

In this video, we can see what the codes "HS" or "SH" mean, which are sometimes printed on fuses: these refer to two different characteristics related to their interruption speed, that is, the response time, and their ability to withstand temporary overloads. "HS" means High Speed, indicating that the fuse is quick to interrupt the circuit in case of overcurrent; it is used in applications where immediate protection is required, such as in circuits with sensitive components (precision electronics or semiconductors). In other standards, they may be marked as FF (very fast acting) or F (fast). "SH" means Slow High Breaking Capacity, indicating a slow fuse but with a high capacity to interrupt high currents; it withstands brief overloads without blowing (useful for motors or transformers, where starting currents are high but temporary). In other standards, they may be referred to as "T" (Time delay) or Slow Blow.

Posted on 10 March 2026 by ScegliAuto

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How to Replace the External Wing Mirror on a Ford C MAX

In the event of a breakage, it will be necessary to replace the external wing mirror on the 2011 Ford C MAX. This operation is easily performed independently. Start by removing the internal cover of the mirror with a plastic lever. Then, use a socket wrench to remove the securing pins. Once the pins are removed, you can take off the mirror, but not before disconnecting the power connectors. Then proceed to fit the new mirror. First, connect the connectors and then secure the mirror to its housing with the pins. Refit the plastic cover and test the operation of the electric mirror using the controls.

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