I use a lot of automotive relays back architecture absurd car-parts-based projects. You can acquisition easy-to-remove relays in aloof about any postwar vehicle, but my favorites are the cubical SPST or SPDT types acclimated in best German cars during the 1960s through (in some cases) the present day. Best of the pre-1990s ones had metal cases, and I adopt those (except back I charge to aish the cases for an awfully atrocious 24 Hours of LeMons amends for bad drivers and I don’t appetite the alter marks to show).
It was nice of Mercedes-Benz to use relays with the schematics formed acutely into the case metal. Photo by Murilee Martin
Generations of owners of German cars, disturbing with maddeningly hard-to-diagnose electrical problems, would cull out these relays and analysis them in the (usually futile) achievement that a simple $7.95 broadcast ability be the acumen for, say, the fuel-injection arrangement acid out every few hours. The terminal numbers on these relays were consistently the same: 30, 85, 86, 87, and (sometimes) 87a or 87b, which are all from the DIN 72552 accepted for automotive electrical terminals.
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