Volvo Service Bulletin 3-37-18

Wiring diagram for Volvo B10M Mk I, Dated May 1980

Note: Assumed to apply from Chassis Number 503 through to 4853

Due to modifications and production changes there were a number of different wiring diagrams released for the the B10M Mk I. I can only assume this Service Bulletin applied from chassis number 503 up to the the release of Service Bulletin 3-37-24.

The table below is based upon information published in Volvo Service Bulletin 3-37-18. The Service Bulletin included the drawing 1190343 P01 for the B10M Mk I. This drawing is basically limited to symbols with component numbers and requires the component description to give meaning to the diagrams. The table below is sorted by the Component Number field and is used to interpret the component numbers on the drawings.

The letter and digit in brackets indicate the box where the component is situated. Connection points marked on the wiring diagrams with a brown arrow are intended for the bodybuilder.

Wiring diagram 1190343 P01 for B10M Mk I from Chassis No 503 through 4853.
Table Sorted By Component Number
Number Description Location
 BatteryG2, G3
6Connector, 6-unit 
12Connector, 12-unit 
20Connector, 37-unit 
32Circuit card, electrical distribution centreF3
33Circuit card, indicator/warning lightsA2
37Terminal, earth connection 
52Fuse holder, 2-unitG1
53Fuse holder, 3-unitG3
60Fuse holder, 14-unitF1
100Switch, headlightsK2
101Switch, fullbeams and dipped beamsB1
115Switch, instrument panel lightC1
119Switch, windscreen wipersB1
120Switch, windscreen washerB1
123Switch, heated rearview mirrorK2
125Switch, exhaust brakeC3
126Switch, diff. lock, wheels, rearC2
144Switch, main circuit switch at batteriesG2
147Switch, direction indicatorsB1
149Switch, hornB1
150Switch, starter switchB2
151Switch, eddy-retarderD2
153Switch, starter heaterC1
159Switch, bulb failure warning lightC1
160Switch, stop engineC2
161Switch, cold startC1
175Switch, level controlC1
176Switch, splitter gearboxC3
177Switch, el. main circuit switch at batteriesK3
195Selector lever, AllisonK1
200Break contact, warning light, parking brakeC1
202Break contact, warning light, oil pressureH2
207Closing contact, indicator light, diff. lock, rear wheelsJ3
215Closing contact, warning light, tachographC2
216Closing contact, stop lightsC1
217Closing contact, reversing lightsJ2
222Closing contact, warning light, temp. torque converterH2
223Slip contact, hornA1
233Closing contact, warning light, coolantK2
238Closing contact, thermalH2
248Closing contact, engine compartment temp.H2
251Break contact, splitter gearboxK1
305Relay, reversing lightsK2
306Relay, fullbeamsE2
307Relay, dipped beamsE2
309Relay, parking lightsE2
312Relay, starter heaterF3
316Relay, solenoid, starter motorG1
320Relay, main circuit switch at batteriesG2
322Relay, coolant levelE2
323To flasher unitK2
325Step relay, fullbeams and dipped beamsE3
328Charging regulatorG2
331Relay, eddy-retarderJ2
333Time relay, starter heaterE3
334Relay, hornE1
342Relay, main circuit switch at batteriesH3
345Relay, start inhibitorE1
349Relay, battery charging warning lightE1
351Relay, cold startG1
354Relay, starting positionE1
361Relay, operation of main circuit switch at batteriesF2
383Relay, engine compartment fanG1
381Relay, splitter gearboxC3
400Bulb, fullbeams and dipped beamsK2
408Bulb, parking light (left, front)K2
409Bulb, parking light (right, front)K2
431Bulb, instrument panel lightK2
500Indicator light, dir. indicator, tractorB2
503Warning light, oil pressure, engineB3
504Indicator light, fullbeamsB2
505Warning light, battery chargingB3
507Warning light, service brakesB2
508Warning light, parking brakeB3
512Warning light, temp. torque converterB3
523Warning light, tachographC2
526Indicator light, eddy-retarderB2
528Indicator light, starter heaterB3
530Indicator light, heated rearview mirrorB2
532Indicator light, reversing lightsB3
540Warning light, oil levelB3
541Warning light, gearbox temp.B3
542Warning light, door brakeB3
543Warning light, lids, luggage and engine compartmentsB2
544Warning light, engine compartment temp.B2
545Indicator light, STOP, bus stopB2
546Warning light, opening doorsB2
547Central warning for indicator and warning lightsD1
554Warning light, coolant temp.B2
555Warning light, coolant levelB3
601Solenoid valve, diff. lock, rear wheelsJ1
603Solenoid valve, engine stopJ1
629Solenoid valve, cold startJ1
642Solenoid valve, splitter gearboxJ1
643Solenoid valve, level controlJ2
650Windscreen wiper motorK2
651Windscreen washer motorK2
654Starter motorH2
655Alternator 60A/80AH3
660Alternator and charging regulator 120AH3
665Engine compartment fanH2
704Pressure gauge, airC1
707Fuel gaugeC1
753Speed sender, engineH1
756Temperature sender, coolantH1
757Fuel gauge senderH1
758Speed sender, gearboxH1
762Oil temperature sender, gearboxH1
763Level sender, oilH2
800Starter heaterF3
807Eddy retarder controlD2
810Electrically heated air drierJ2
903DiodeF2, D2
950Electric coils, eddy-retarderJ2
1002Cable harness, tachographC2
1011Cable harness, direction indicatorsA1
1012Cable harness, windscreen wipersA1
1014Cable harness, starting switchA2
1030Cable harness, engineH1
1033Cable harness, eddy-retarderD3
1035Cable harness, diff-lockB3
1039Cable harness, splitter gearboxB3
1040Cable harness, frameG1
1052Cable harness, dashboard - electrical distribution centreD1
1053Cable harness, el. boxG1