Engine Compartment: Relays

Fig 1: Identifying Engine Compartment Fuse/Relay Block (Electrical Distribution Box) Relays

Courtesy of VOLVO CARS OF NORTH AMERICA.

Engine Compartment Relay Assignments

Relay No.	Module No.	Function
R2	2/17	Relay, horn
R3	2/133	Relay, vacuum pump (Late Design Vehicles)
R4	2/34	Relay, front fog lights
R5	2/142	Fuel filter preheater relay
R9	2/182	Relay, headlight washer motor
R10	2/82	Relay, heated rear window
R11	2/22	Relay, climate control system
R12	2/14	Relay, glow plug system
R13	2/35	Relay, starter motor
R14	2/32	Main relay, engine management system