Bulbs, Fuses, Wiring & Electrical

Headlight Bulb Size Codes Explained: H11, 9005 and H7

Headlight bulb size codes explained: what H11, 9005 and H7 identify, why one bulb has two names, and where your car's own code is printed.

How to Read a Fuse Box Diagram and the Lid Legend

How to read fuse box diagram charts and lid legends: what the number, rating and component columns mean, and what the blank rows are telling you.

Bulbs, Fuses, Wiring & Electrical

LED Headlight Retrofit Halogen Housing: What Specs Miss

LED headlight retrofit halogen housing guide: why a matching base is not a matching beam, what US rules say, and the legal ways to get better light.

Bulbs, Fuses, Wiring & Electrical

Car Fuse Types Sizes Difference: Mini vs ATO vs Maxi

Car fuse types sizes difference explained: how Mini, Low-Profile Mini, ATO and Maxi blade fuses compare, and how to tell which format your fuse box takes.

Bulbs, Fuses, Wiring & Electrical

Can I Put a Bigger Fuse in My Car? Why You Never Size Up

Can I put a bigger fuse in my car? No. See why the rating protects the wiring, what fuse colors mean, and what a fuse that keeps blowing is telling you.