# ISO 4091:1978 — Withdrawn and superseded ISO standards

For ISO 4091:1978, item title is Road vehicles — Electrical connections between towing vehicle and trailers — Test methods and requirements; status code is 9599; successor is ISO 4091:1992; withdrawn / published date is 1978-10-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 4091:1978 _(verified: appears in the quote below)_
- **Item title:** Road vehicles — Electrical connections between towing vehicle and trailers — Test methods and requirements _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 4091:1992
- **Withdrawn / published date:** 1978-10-01 _(verified: appears in the quote below)_

## What the source says

> 9823,IS,,ISO 4091:1978,Road vehicles — Electrical connections between towing vehicle and trailers — Test methods and requirements,Véhicules routiers — Liaisons électriques entre véhicules tracteurs et véhicules remorqués — Méthode d'essai et exigences,1978-10-01,1,['43.040.10'],ISO/TC 22,9599,,[9824],"['en','fr']",2,

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).