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 4854 up to the the release of Service Bulletin 3-37-26.
The table below is based upon information published in Volvo Service Bulletin 3-37-24. The Service Bulletin included the drawing 1193990 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 Location field indicate the box on the diagram where the component is situated. Connection points marked on the wiring diagrams with a brown arrow are intended for the bodybuilder.
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| Wiring diagram 1193990 P01 for B10M Mk I from Chassis No 4854 through 8029. |
| Table Sorted By Component Number | ||
|---|---|---|
| Number | Description | Location |
| 4 | Connector, 4-unit | |
| 6 | Connector, 6-unit | |
| 8 | Connector, 8-unit | |
| 12 | Connector, 12-unit | |
| 20 | Connector, 37-unit | |
| 30 | Batteries | B5 |
| 32 | Circuit card, el. distribution centre | A6 |
| 33 | Circuit card, indicator lamps | A10, B11 |
| 34 | Junction | A6 |
| 37 | Terminal, earth conn. | B4, A4, A5, B6, B8 |
| 53 | Fuseholder, 3-unit | A4 |
| 54 | Fuseholder, 4-unit | B5 |
| 60 | Fuseholder, 14-unit | C6 |
| 85 | Support rod, start aid, 2-unit | A5 |
| 101 | Switch, fullbeams and dipped beams | C10 |
| 115 | Switch, instrument lighting | C9 |
| 119 | Switch, windscreen wipers | C10 |
| 120 | Switch, windscreen washers | C10 |
| 125 | Switch, exhaust brake | A9 |
| 126 | Switch, diff. lock wheels, rear | B8 |
| 144 | Switch, battery master switch | A4, B12 |
| 147 | Switch, direction indicators | C10 |
| 149 | Switch, horn | C10 |
| 150 | Switch, starting switch | B10 |
| 151 | Switch, el. retarder | A8 |
| 153 | Switch, automatic preheater | B9 |
| 159 | Switch, bulb check | C9 |
| 160 | Switch, stop engine | B9 |
| 161 | Switch, cold start | B9 |
| 175 | Switch, level control | C9 |
| 176 | Switch, overdrive (split) | B8 |
| 180 | Switch, emergency switch | C8 |
| 181 | Switch, reset jackknife brake (p-brake) | B1 |
| 200 | Brake contact, warning lamp, parking brake | C9 |
| 202 | Brake contact, warning lamp, oil pressure | B3 |
| 207 | Closing contact, indicator lamp diff. lock wheels rear | A3 |
| 215 | Closing contact, warning lamp, tachograph | A9 |
| 216 | Closing contact, brake lights | C9 |
| 217 | Closing contact, reversing lights | A3 |
| 221 | Closing contact, jackknife warner | C1 |
| 223 | Slip contact, horn | C11 |
| 233 | Closing contact, warning lamp, coolant | B12 |
| 238 | Closing contact, thermal | B3 |
| 248 | Closing contact, engine comp. temp. | B3 |
| 251 | Brake contact, splitter gear | C2 |
| 256 | Closing contact, jackknife release (p-brake) | Cl |
| 260 | Closing contact, tyre puncture warner | B1 |
| 306 | Relay, fullbeams | B7 |
| 307 | Relay, dipped beams | B7 |
| 309 | Relay, parking lights | B7 |
| 312 | Relay, starting heater | A5 |
| 316 | Relay, control magnet, starter motor | C4 |
| 322 | Relay, coolant level | B7 |
| 325 | Step relay, fullbeams and dipped beams | A7 |
| 328 | Charging regulator | B4 |
| 330 | Relay, windscreen wipers | A6-B6 |
| 331 | Relay, el. retarder | B2 |
| 333 | Time relay, automatic preheater | A7 |
| 334 | Relay, horn | B7 |
| 342 | Relay, battery master switch | B4 |
| 345 | Relay, start inhibitor | C7 |
| 349 | Relay, battery charging warning lamp | C7 |
| 351 | Relay, cold start | B4 |
| 354 | Relay, start position | C7 |
| 361 | Relay, operation of battery master switch | C4 |
| 383 | Relay, engine comp. fan | C4 |
| 384 | Relay, splitter gear | B8 |
| 391 | Relay, emergency switch | B6 |
| 392 | Relay, jackknife warner | B1 |
| 393 | Relay, re-set jackknife brake (p-brake) | B1 |
| 500 | Indicator lamp, direction indicator, tractor | B10 |
| 503 | Warning lamp, oil pressure, engine | A10 |
| 504 | Indicator lamp, fu11beams | B10 |
| 505 | Warning lamp, battery charging | A10 |
| 507 | Warning lamp, service brakes | B10 |
| 508 | Warning lamp, parking brake | A10 |
| 512 | Warning lamp, temp. torque converter | A10 |
| 523 | Warning lamp, tachograph | B9 |
| 526 | Indicator lamp, el. retarder | B10 |
| 528 | Indicator lamp, starting heater | A10 |
| 530 | Indicator lamp, rear view mirror heating | B10 |
| 532 | Indicator lamp, reversing lights | A10 |
| 540 | Warning lamp, oil level | A10 |
| 541 | Warning lamp, gearbox temp. | A10 |
| 542 | Warning lamp, door brake | A10 |
| 543 | Warning lamp, lids, luggage and engine comp. | B10 |
| 544 | Warning lamp, engine comp. temp. | B10 |
| 545 | Indicator lamp, stop, bus stop | B10 |
| 546 | Warning lamp, doors opening | B10 |
| 547 | Central warning for indicator and warning lamps | C8 |
| 554 | Warning lamp, coolant, temp. | B10 |
| 555 | Warning lamp, coolant, level | A10 |
| 558 | Indicator lamp, jackknife warner | B1 |
| 601 | Solenoid valve, diff. lock wheels rear | C2 |
| 603 | Solenoid valve, engine stop | C2 |
| 629 | Solenoid valve, cold start | C2 |
| 642 | Solenoid valve, overdrive (split) | C3 |
| 643 | Solenoid valve, level control | B2 |
| 647 | Solenoid valve, jackknife brake (p-brake)release | C1 |
| 654 | Starter motor | A4 |
| 655 | Alternator 60A/80A | A4 |
| 660 | Alternator with charging regulator 120A | A4 |
| 665 | Engine comp. fan | B3 |
| 700 | Speedometer | B9 |
| 701 | Tachograph | B9, A9 |
| 703 | Rev counter | C9 |
| 704 | Air pressure gauge | B9, A1 |
| 706 | Thermometer | C9 |
| 707 | Fuel gauge | C9 |
| 753 | Speed sender, engine | C3, C1 |
| 756 | Temperature sender, coolant | C3 |
| 757 | Fuel level sender | C3 |
| 758 | Speed sender, gearbox (no tachograph) | C3 |
| 758 | Speed sender, gearbox (with el. tachograph) | B3 |
| 762 | Oil temp. sender, gearbox | C3, C8 |
| 763 | Level sender, oil | B3 |
| 800 | Starting heater | A5 |
| 806 | Resistance | C9 |
| 807 | El. retarder control | A8 |
| 810 | El. heated air dryer | B2 |
| 853 | Buzzer | C8 |
| 903 | Diode | C5, B6, A8 |
| 908 | Shunt | B5 |
| 950 | El. coils, el. retarder | B3 |
| 1000 | Cable harness, instruments | B4, C8, C10 |
| 1002 | Cable harness, tachograph | B9 |
| 1011 | Cable harness, direction indicators | C11 |
| 1012 | Cable harness, windscreen wipers | C11 |
| 1014 | Cable harness, starting switch | C11 |
| 1030 | Cable harness, engine | C4 |
| 1033 | Cable harness el. retarder | A8 |
| 1035 | Cable harness, diff. lock | B8 |
| 1039 | Cable harness, overdrive | B8 |
| 1040 | Cable harness, frame | C5 |
| 1052 | Cable harness, dashboard-el. distr. centre | C7 |
| 1053 | Cable harness, el. box | C5 |