Which pin is terminal 30 on this 5-pin relay?

Terminal 30 corresponds to pin 3, the wider blade in the top row of the relay base.

Which terminals connect to the relay coil?

The coil is drawn between terminal 85 (pin 1) and terminal 86 (pin 2).

What are terminals 87 and 87a on this diagram?

Terminal 87 is pin 5 and terminal 87a is pin 4. The switch arm from terminal 30 is shown resting toward 87a, indicating 87a is the contact connected when the relay is at rest.

How are the five pins physically arranged on the relay base?

Pins 1, 2, and 3 are in a top row (pin 3 is a wider blade), and pins 4 and 5 are vertical blades in a bottom row.

Home/ Registry/ Ford/ Bronco/ 1987-1991/ “Eddie Bauer”/ Photo supermotors.net/registry/media/961740

5-Pin Automotive Relay Pinout Diagram - Terminals 30, 85, 86, 87, 87a

Five-pin relay socket layout and internal coil/contact schematic

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Relay schematic showing numbered socket terminals and the internal coil and switching contacts mapped to pins 30, 85, 86, 87 and 87a.

AI caption January 2013 · Photo 1496 of 1799

This document is a schematic illustration of a standard 5-pin automotive relay, uploaded as part of a multi-image relay reference set for a 1990 Ford Bronco. The left portion shows the physical footprint of the relay base with five terminals: pins 1, 2, and 3 arranged in a top row (pin 3 being a wider blade) and pins 4 and 5 in a bottom row. The right portion shows the internal electrical schematic and cross-references each physical pin number to its standard DIN relay terminal designation: pin 1 = terminal 85, pin 2 = terminal 86, pin 3 = terminal 30, pin 4 = terminal 87a, and pin 5 = terminal 87. The schematic depicts the electromagnet coil connected between terminals 85 and 86, and a movable switch contact on terminal 30 shown at rest against terminal 87a (the normally-closed contact), with terminal 87 as the normally-open contact. A reader can learn how to identify relay terminals by pin position and understand the internal switching arrangement of a common SPDT automotive relay. No year, make, model, or part numbers appear in the image itself.

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Frequently asked questions

Which pin is terminal 30 on this 5-pin relay?: Terminal 30 corresponds to pin 3, the wider blade in the top row of the relay base.
Which terminals connect to the relay coil?: The coil is drawn between terminal 85 (pin 1) and terminal 86 (pin 2).
What are terminals 87 and 87a on this diagram?: Terminal 87 is pin 5 and terminal 87a is pin 4. The switch arm from terminal 30 is shown resting toward 87a, indicating 87a is the contact connected when the relay is at rest.
How are the five pins physically arranged on the relay base?: Pins 1, 2, and 3 are in a top row (pin 3 is a wider blade), and pins 4 and 5 are vertical blades in a bottom row.