Volvo FH Fuse and Relay Diagram
A diagram showing the location and purpose of fuses and relays in Volvo FH trucks. The guide helps to quickly identify which fuse or relay is responsible for a specific system (lighting, ABS, climate control, etc.), and also facilitates fault diagnosis and component replacement. Suitable for models of various years of production and generations.
Relays
K01 Relay, starting switch, radio position AC:3 C
K02 Relay, EMS (Engine Management System) BA:1 A
K03 Relay, starter motor AA:2 B / CJ:4 B
K04 Relay, body builder fuse box (kl.15) ME:2 A / MF:1 A
K05 Relay, I-shift/Powertronic/Retarder DC:0 A / DM:0 A
K06 Relay, fan climate unit HY:0 B / HY RHD:0 B
K07 Relay, intermittent wiper GM:1 C
K08 Relay, gearbox area inhibitor BA:1 A
K09 Relay, interior lamps IH:2 A / IH3:3 A
K10 Relay, fifth wheel-, working-light KE:0 C
K11 Relay, air suspension FB:1 B
K12 Relay, reverse light, trailer GB:4 D
K13 Relay, alternator controlled AA:4 B
K14 Time delay relay, bogie lift, A-ride FI:1 B / FK:1 C
K15 Time delay relay, bogie lift, A-ride with axle load limiter FK:2 C
K16 Relay, bogie lift, A-ride, with axle load limiter FK:1 C
K20 Relay, D+ short-circuit, (ADR-trucks only) AE:4 D
K21 Relay, el. adjustable seat IA:2 B
K22 Relay, climate fan, 1st speed (by parking heater) HY:1 B / HY RHD:0 B
K23 Relay, cab tilt KA:0 C
K24 Relay, central lubrication FU:0 B
K25 Relay, light sign KI:1 C
K26A Relay, foldable rear view mirror arm, Japan IF:0 C
K26B Relay, foldable rear view mirror arm, Japan IF:1 C
K30 Relay, beacon warning light KM:0 B
K35 Relay, headlamp high pressure wash GM:0 B
K37 Relay, parking light NA:1 C / NB:0 C
K38 Relay, body builder preparation, swapbody lamps NA:1 C / NB:1 C
K39 Relay, body builder preparation, plough light, spotlights NA:1 C / NB:1 C
K40 Relay, body builder preparation NA:3 C / NA_2-2 C / NB:3 C
K41 Relay, body builder preparation, swapbody NA:2 C / NB:2 C
K42 Relay, body builder preparation, spotlights NI:1 B
K43 Relay, body builder preparation, external start NC:3 C
K45A Relay, body builder preparation, dual speed NU:2 B
K45B Relay, body builder preparation, dual speed NU:2 C
K48 Power relay, engine preheating CJ:3 B
K49 Power relay, bogie lift motor FI:3 B / FK:3 D
K51 Power relay, battery main switch AB:0 C
K61 Relay, auxiliary reverse light, truck NA:0 C / NA_2-3 B / NB:0 C
K63 Relay, ACC Adaptive cruise control BE:0 B
K64 Relay, man. main switch BBOX-EF AB:1 C
K65 Power relay, starter motor pre-relay AA:1 D / CO:2 B
K66 Relay, tail lift indication NB:2 C
K67 Relay, rainsensor, high speed wiper GM:3 C
K68 Relay, 24V, outlet IR2:1 A
K69 Relay, fuel heater, thermoline FX:0 C
K70A Relay, ADR/SLP AF:0 B
K70B Relay, ADR/SLP AF:0 D