Hand holding wired Bosch-style ISO relays and sockets, labeled d…

Relay Blocks

These slide-together relay sockets are from a cheap aftermarket alarm, but they can be used for almost anything. These standard Bosch/ISO relays have mounting tabs, but not all do. All share a pinout, including pin numbers. The relay coil is between pins 85 & 86. The common power contact is pin 30; normally closed (NC) is 87a (if present); normally open (NO) is 87. The standard rating is 30A, but higher ratings are available with larger terminals.

See also:
MotorCraft 2016 Wiring Pigtail Guide

Owner caption March 2006 · Photo 1229 of 5000