Krueger Crane Systems INC4699 Colt Road, Rockford, ILL, 61109ABCTroubleDefective relay.CauseBurned out coil or bad contactCorrectiveactionThe Bosch relay has 5 marked terminal pins. No. 85 and No. 86 are connected to the relay coil. (85 and 86 areinterchangable, either 85 is hot and 86 is ground or 86 is hot and 85 is ground). No. 30, No. 87, No. 87a are thecontacts. Using an OHM meter you can check the relay. The OHM meter should read, with no power at 85 and 86 (coil)a closed circuit, between No. 3o and No. 87a (normally closed) and an open circuit between No. 3o and No. 87(normally open). With power at the relay the circuit is closed between No. 30 and No. 87 and open between No. 3o andNo. 87a. If the contact is not changing replace relay.Relay DrawingsWiring DiagramPhone (815) 874-9402Telex 25-74°911
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