Description

Bomag BW 141AD-2, BW 151AD, BW 151ADH, BW 151AC-2, C760C 2002 Wiring Diagram

If you’ve ever tried to chase a short in a Bomag roller using a third-party wiring sketch that left out half the connections, you know the frustration. Aftermarket diagrams skip the cross-bonding boxes, ignore the XENON worklamp relay logic, and treat the asphalt manager controller like a black box. This 25-page factory document from 2002 is the real thing – pulled straight from Bomag’s engineering files. It covers the Bomag BW 141AD-2, BW 151AD, BW 151ADH, BW 151AC-2, C760C models. Every sheet has a Bomag part number (841 301 25) and a date stamp from June 2002. That tells me it’s the original release, not a reprint.

Page 1 gives you the general circuit diagram overview with thick lines for standard wiring and thin lines for printed board traces. The Wiring Diagram is not a guess – it’s a schematic you can actually meter out. I’ve been burned by generic wiring books that show a generic alternator circuit and leave you to figure out the rest. This one lists every connector pin: X1, X3, XM13, and the cross-bonding box terminals. You need to find the starting circuit? Page 2 shows supply, starting unit, cabin, socket, and engine hour meter – with fuse ratings and relay coil identification.

15 Separate Circuit Sheets

The manual breaks the electrical system into 15 numbered sheets (plus a component listing). Each sheet is a dedicated function group: sheet 002 handles supply and start boost; sheet 003 covers brake monitoring, warning horn, and reverse alarm; sheet 004 goes into vibration and asphalt temperature sensing. This separation saves time when you’re troubleshooting. Instead of staring at one giant wall of lines, you flip to the relevant sheet. For instance, if the sprinkler system won’t stop running, go to sheet 005 – it covers the sprinkler system, crab walk, and edge cutter. No other circuits clutter the page.

Does It Cover the Asphalt Manager?

Yes – sheet 010 is dedicated entirely to the Asphalt Manager controller. That’s a common failure point on these rollers. The diagram gives you the input/output pins and the relationship with the speed control and omega meter. Without this sheet, you’d be swapping expensive controllers guessing. Sheet 006 covers the omega meter and speed control itself. Sheet 007 covers the tachograph and chip spreader. The only thing missing is a schematic for the engine ECM (that’s a separate manual) – but all the chassis wiring and operator controls are here.

Component Listing: Sheet 101

Sheet 101 is the component list. It’s not a parts catalog – it’s a cross-reference of all electrical components shown in the diagrams: relays, fuses, connectors, and their locations. When I’m tracking down a no-start, I start with sheet 002, then verify the component numbers against sheet 101 to find the real-world part on the machine. The listing includes designations like K05, K11, F01, and X1. You can trace a wire from the ignition switch (S00) through fuse F01 to the starter relay K05. That level of detail keeps you out of the parts cannon trap.

Why OEM Wiring Diagrams Matter

Aftermarket sources often redraw schematics and introduce errors. I’ve seen a third-party manual swap the pin numbers on the X1 connector – that’ll smoke a module fast. This is a certified Bomag factory document. The original file name ends in 17011000891.pdf and includes both German and English labels. Every sheet has the drawing number 841 301 25 and a revision date. If you’re restoring a C760C or a BW 151ADH, you want the exact schematic that the assembly line used. No interpretation, no shortcuts.

3 Things to Check First

• Battery supply and starter circuit – Sheet 002. Verify F00 fuse and G01 battery connections. Page 2 shows the 12V socket circuit as well.
• Vibration solenoid wiring – Sheet 004. The asphalt temperature sensor circuit passes through the controller. If the vibration won’t engage, check the temperature input first.
• Cross-bonding boxes – Sheets 012–015. These are junction boxes that tie the cabin wiring to the chassis harness. Moisture gets in there and corrodes terminals. The diagram labels each box terminal so you can test continuity end-to-end.

FAQ

Does this manual include torque specs or engine repair procedures?

No. This is a wiring diagram only. It covers electrical circuits, connector pinouts, and component locations. For engine mechanicals or hydraulic torque specs, you need the Bomag service manual.

Is the manual in English?

Yes. The PDF includes both German (DEUTSCH) and English (ENGLISH) tables of contents and labels. The schematics use international symbols, so language isn’t a barrier.

Will this diagram work for a BW 141AD-2 with a different engine?

The wiring diagram covers the standard Bomag electrical system for these models, including the cabin, lights, vibration, and optional equipment like the asphalt manager. If the machine has a non-Bomag engine retrofit, the engine-specific wiring will differ. The chassis wiring (supply, brakes, lights) should still match.

How many pages and what is the publication year?

25 pages total. The manual was released in 2002. The drawing numbers and revision stamps confirm 10.06.2002 as the approval date. It is the original factory release, not a later revision.

If you work on Bomag rollers, stop chasing wire colors with aftermarket diagrams. Access the Factory Manual now and keep a copy on your tablet in the bay. It’s 25 pages of OEM circuit data that pays for itself the first time you diagnose a no-vibration condition without swapping the controller.

Related Manuals

• Bomag BW 141-4, BW 203-4 2006 Wiring Diagram – OEM Factory Manual
• Bomag T-MAG XC User Manual – Factory Specs & Operations Guide
• Bomag BC 670 RB Training Manual – Factory Specs & Repair Docs

For general automotive wiring principles, see Automotive Wiring and Automotive Wiring.