Standard Ignition HR-138 Warning Buzzer Relay

Warning Buzzer Relay for Cadillac Applications

The Standard Ignition HR-138 is a 12-volt warning buzzer relay built for select Cadillac electrical systems. It uses a rectangular connector, 4 male blade terminals, and an included mounting bracket for a secure under-hood or body-mounted installation.

• 20 amp amperage rating for warning buzzer relay circuits
• 12-volt electrical system application
• Rectangular connector shape with 4 male blade terminals
• Blade terminal design for straightforward harness connection
• Mounting bracket(s) included
• Non-continuous duty relay construction

OE-Style Electrical Replacement

Standard Ignition HR-138 is built with composite housing materials to help protect the relay from heat and severe under-hood conditions. Brass or copper contacts are used where specified to support wear resistance, and the part is manufactured under TS16949 and ISO9001 quality systems. This relay is a direct-fit style replacement for Cadillac Commercial Chassis, DeVille, Eldorado, Fleetwood, and Seville applications across the 1967-1976 model years, including engine temperature warning buzzer setups on select vehicles. This part cross-references Gates 20847 for the same application.

What This Relay Helps Address

• Inoperative warning buzzer operation
• Intermittent relay switching in the warning circuit
• Heat-related relay housing deterioration
• Electrical contact wear in older Cadillac systems
• Faulty engine temperature warning buzzer function on listed applications

Installation Notes

Verify the connector shape, terminal count, and 12-volt system requirements before installation. Match the relay to the vehicle’s original warning buzzer circuit and confirm the mounting location and bracket alignment. For Cadillac DeVille, Eldorado, Fleetwood, Commercial Chassis, and Seville models, compare the existing relay and wiring layout to the HR-138 before final connection.

Quality Assurance

Standard Ignition manufactures this relay under controlled quality processes with TS16949 and ISO9001 certified plants. The HR-138 is produced to meet stringent part specifications for consistent fit and electrical performance in the listed Cadillac applications.