ISO TR 8857:1986 pdf free download.Road vehicles – Flashers Functional allocation of terminals.
0 IntroductIon
Subcommittee ISO/TC 22/SC 3, Electrical connections, has studied the functional allocation of flasher terminals since 1971. In spite of efforts, and because of the large number of existing flashers on the market, the Subcommittee has not obtained the necessary substantial support for one type. At Its last meeting in Budapest In May 1984, Subcommittee ISO/TC 22/SC 3 decided therefore to propose the publication of a Technical Report of type 1.
1 Scope and field of application
This 1 echnlcal Heport indicates the most important of the systems of flasher units used today. All of them have the same sodet type, but each of them with a different functional allocation of the terminals.
This Technical Report shall prevent development of new flasher units having the same socket type according to ISO 7500 but with different functional allocations.
2 Reference
ISO 7588, Road vehicles — Relays and flashers — Mounting and positioning dimensions of male tabs and socket apertures foe relays end flashers.
3 Positioning and functional allocation of the terminals
3.1 PositionIng
The termInal positioning shown In the figure is specified in ISO 7588.
Terminal numbers 1 to 5 are not terminal markings. They are used in this Technical Report only to show the functional allocation.
3.2 FunctIonal allocation
The differem terminal functional elloIions of flashu, unit systems are shown in the table.