Bobcat M5007 (50-07) Fault Code: Front Light Output Open Circuit
Also shown on the panel as 50-07
Front Light Output Open Circuit · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
M5007 (panel code 50-07) sets when the gateway controller does not detect an open on signal wire 6320, the front work lights relay circuit. It means the controller expected to see an open condition on that circuit and did not, pointing to a wiring, ground, relay, or controller problem in the front work lights circuit.
Low severity. This code affects the front work lights circuit only. It does not indicate an engine, hydraulic, or braking problem, but poor lighting can be a safety issue if you operate in low light or at night. Diagnose before running after dark.
What does Bobcat error code M5007 mean?
A code M5007 occurs when the gateway controller does not detect an open on the front work lights relay signal wire, wire 6320. The gateway controller sends battery voltage on wire 6320 to the front work lights relay whenever the lights are commanded on. The controller monitors this circuit for an open condition as part of normal relay diagnostics.
When the controller cannot see the expected open, it flags M5007. This usually points to a wiring fault, a bad ground connection, a failed relay, or a controller issue somewhere in the front work lights circuit rather than a problem with the lights themselves.
This code is strictly about the front work lights relay circuit. It will not affect drive, hydraulic, or engine operation, but it should be resolved before working in conditions where the front work lights are needed.
Common causes of M5007
- Signal wire 6320 shorted to supply voltage or open
- Ground wire open: reported as 2045/2105, 2045, or 2020/2030 depending on model and harness variant
- Front work lights relay failed or not switching correctly
- Gateway controller fault
- Moisture, corrosion, or pushed-back pins in the gateway controller connectors, front lights relay connector, or mainframe harness
- Intermittent fault: if the code is not active at the time of testing, the cause may not be found immediately. Probable causes for intermittent codes include loose connections, corrosion, pushed-back pins, the controller, the wiring harness, or a combination of these
How to troubleshoot Bobcat M5007: first checks
- : Verify the front work lights actually operate when commanded on, and note whether the fault is present or intermittent at the time of testing
- Inspect the front work lights relay and its connector for corrosion, moisture, or pushed-back pins
- Check wire 6320 for chafing, shorts to supply voltage, or an open circuit along its length
- Check the relevant ground wire (2045/2105, 2045, or 2020/2030 depending on model) for a poor or open ground connection
- Inspect gateway controller connectors and the mainframe harness connectors for corrosion or pushed-back pins
- If no fault is found and the code was intermittent, recheck all connections and grounds since the root cause may not show up during a single test session
How the code clears
Once the repair is complete, cycle key power off and back on to clear the code. No separate clearing step is listed beyond a power cycle.
Affected models and serial ranges
M5007 appears in our records across 16 Bobcat models. Match your machine by model and serial number.
| Model | Serial ranges |
|---|---|
| S510 | SN A3NJ11001-99999, SN A3NK11001-99999, SN ATZC11001-ATZC99999 |
| S530 | SN A7TV11001-99999, SN ATZD11001-99999 |
| S550 | SN A3NK11001-A3NL99999, SN A3NM11001-99999 |
| S570 | SN A7U711001-799999, SN A7U811001-899999 |
| S590 | SN ANMN11001-99999, SN ANMP11001-99999 |
| S630 | SN A3NT12370-99999, SN A3NU11001-11111, SN A3NU11112-99999 |
| S650 | SN A3NV11001-13098, SN A3NV13099-99999, SN A3NW11001-11248, SN A3NW11249-99999 |
| S750 | SN A3P211001-299999 |
| S770 | SN A3P411001-99999 |
| T550 | SN A7UJ11001-AJZV12276 |
| T590 | SN ALJU11001-999999, SN B37811001-999999, SN B3Z711001-999999 |
| T630 | SN A7PU11001-11663, SN A7PU11664-99999 |
| T650 | SN A3P012214-099999, SN A3P111242-199999 |
| T750 | SN ANKA11001-A99999 |
| T770 | SN A3P811001-899999, SN A3P911001-999999 |
| T870 | SN A3PG11001-99999, SN A3PH11001-99999 |
Frequently asked questions
What does Bobcat code M5007 mean?
It means the gateway controller did not detect an expected open condition on wire 6320, the front work lights relay signal circuit. This points to a wiring, ground, relay, or controller issue in the front work lights circuit.
What is the panel display form of M5007?
On the dash panel, this code displays as 50-07.
Is M5007 dangerous to keep driving with?
It only affects the front work lights circuit, so it will not affect steering, braking, or hydraulic function. However, if you rely on the front work lights for visibility, get it fixed before operating in low light.
Which Bobcat machines can show M5007?
It applies to S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, T770, and T870 skid-steer and track loaders.
Why does the ground wire number differ between machines?
Different model years and harness configurations use different ground wire numbers for this circuit, seen as 2045/2105, 2045 alone, or 2020/2030 depending on the machine. All of these grounds feed the same front work lights circuit logic.
How do I clear M5007 after repair?
Cycle the key switch off and back on. No other clearing procedure is listed.
The code only shows up sometimes, how do I fix an intermittent M5007?
Intermittent codes can be harder to pin down since the fault may not be active during testing. Check for loose connections, corrosion, pushed-back pins in connectors, and inspect the wiring harness and controller connections carefully, since any of these or a combination can cause an intermittent fault.