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Bobcat · Electrical

Bobcat code M7748: Key switch multiple

What it means

The controller sees more than one key-on input at the same time. On Bobcat telehandlers this is listed as the key switch and a service tool both being on.

Can I keep running?

Keep going carefully, fix soon

Usually, if the machine runs normally: finish the job carefully and fix it soon. Stop if the machine derates, overheats, loses power or the code comes with an alarm.

Check first

  1. Park on level ground, lower the lift arms and attachment to the ground, stop the engine and remove the key.
  2. Disconnect any diagnostic tool from the service port.
  3. Turn the key off, wait a few seconds, and start with only one method (key or keypad).
  4. Restart and see if the code comes back. If it does, stop and call your Bobcat dealer.

Likely causes

  • Service tool connected while the key switch is on
  • Key switch or keyless panel input stuck on
  • Wiring fault in the key-on circuit

The fix

Unplugging a service tool or using one start input usually clears it. If not, a dealer should check the key switch and wiring.

Different code on your screen? Snap the display and Mechy reads it.

Related electrical codes

All Bobcat codes

Questions

What does Bobcat code M7748 mean?

Key switch multiple. The controller sees more than one key-on input at the same time. On Bobcat telehandlers this is listed as the key switch and a service tool both being on.

Can I keep running with M7748?

Usually, if the machine runs normally: finish the job carefully and fix it soon. Stop if the machine derates, overheats, loses power or the code comes with an alarm.

How do I fix Bobcat code M7748?

Unplugging a service tool or using one start input usually clears it. If not, a dealer should check the key switch and wiring.

Sources

  1. Bobcat Company, Diagnostic Service Codes list (fault codes PDF, 2020)
  2. Bobcat T450 Operation & Maintenance Manual 7250077 (2018), Diagnostic Service Codes
  3. BigRentz, Full List of Bobcat Fault Codes (searchable table)

Code meanings vary by model, serial range and software. Confirm with your operator's manual or Bobcat dealer before replacing parts.

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