# Headlight & taillight failure

**URL:** https://forum.motoguzziclub.co.uk/t/headlight-taillight-failure/22264
**Category:** Big Block Tonti and Loop Frame models
**Tags:** cali1100
**Created:** [6 October 2025 17:21 UTC](https://forum.motoguzziclub.co.uk/t/headlight-taillight-failure/22264 "2025-10-06T17:21:47Z")
**Posts on this page:** 1
**Showing post:** 7

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### Author: ![Chris950s](https://forum.motoguzziclub.co.uk/user_avatar/forum.motoguzziclub.co.uk/chris950s/32/43_2.png) [@Chris950s](https://forum.motoguzziclub.co.uk/u/Chris950s)
#### Post date: [7 October 2025 08:08 UTC](https://forum.motoguzziclub.co.uk/t/headlight-taillight-failure/22264/7 "2025-10-07T08:08:25Z")

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> [@StevoR](#):
>
> Not working - Main beam, Dip beam, Rear light, Sidelight, instrument lights - Fuse F3
> 
> Working - Brake lights, indicators, horn, warning lights, bike starts and runs - Other fuses

Take out fuse 3 and check it is not blown, if not then clean the contacts or swap with one of the same amperage.

@Don-Spada Yes Don I have drawn this model and copies are available, [(see here)](https://forum.motoguzziclub.co.uk/t/a3-colour-laminated-wiring-diagrams/361) however it has an ECU and I shy away from drawing these as they are much more complicated. Maybe when I finally retire… watch this space!

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