Freightliner Business Class M2 Bulkhead Module Pin Out

By | May 30, 2023

Freightliner Business Class M2 Bulkhead Module Pin Out

The Freightliner Business Class M2 is a popular choice for commercial truck drivers, thanks to its powerful engine, comfortable cab, and impressive fuel economy. However, like any other vehicle, the M2 can experience electrical problems. If you're having trouble with your M2's bulkhead module, the following pinout diagram can help you troubleshoot the issue.

Freightliner Business Class M2 Bulkhead Module Pinout

| Pin Number | Description | |---|---| | 1 | Battery positive (B+) | | 2 | Battery negative (B-) | | 3 | Ignition switch (IG) | | 4 | Starter relay (ST) | | 5 | Fuel pump relay (FP) | | 6 | Air conditioner clutch relay (A/C) | | 7 | Accessory relay (ACC) | | 8 | Brake light switch (BR) | | 9 | Turn signal switch (LT) | | 10 | Hazard light switch (HA) | | 11 | Headlight switch (LT) | | 12 | Dimming switch (DIM) | | 13 | Horn relay (HR) | | 14 | Wiper motor (WI) | | 15 | A/C compressor clutch (A/C) | | 16 | Cruise control switch (CC) | | 17 | DEF tank level sensor (DEF) | | 18 | DEF heater (DEF) | | 19 | DEF pump (DEF) | | 20 | DEF filter (DEF) |

Troubleshooting Tips

If you're having trouble with your M2's bulkhead module, the following troubleshooting tips can help you identify the problem. *

Check the fuses.

First, check the fuses in the bulkhead module to make sure they're not blown. If a fuse is blown, replace it with a fuse of the same amperage. *

Check the wiring.

Next, check the wiring for any damage or corrosion. If you find any damage, repair or replace the wiring as needed. *

Test the components.

Finally, test the components in the bulkhead module to make sure they're working properly. You can do this using a multimeter or a diagnostic tool. If you're unable to troubleshoot the problem yourself, you can take your M2 to a qualified truck repair shop.

Conclusion

The Freightliner Business Class M2 is a reliable truck, but it can experience electrical problems like any other vehicle. If you're having trouble with your M2's bulkhead module, the pinout diagram and troubleshooting tips in this article can help you identify and fix the problem.


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