SPN 1081 FMI 5: wait-to-start lamp, current low or open circuit
Wait-to-start lamp circuit: current below normal or open circuit. Type another SPN and FMI to check it.
Wait-to-start lamp circuit: current below normal or open circuit. An electrical fault (usually a broken wire, an unplugged connector or an open coil), not a reading out of range.
- Look at the plug and harness at the wait-to-start lamp for rubbed, pinched, wet or green pins.
- Check supply voltage and ground at the plug (or the coil resistance on a valve or heater).
- If the wiring is good, replace the part.
Paste the whole line if you like: "SPN 3251 FMI 0", "3251/0" or Deere's "003251.00". Plain-words guidance; the service manual wins.
What SPN 1081 FMI 5 means
Wait-to-start lamp circuit: current below normal or open circuit. An electrical fault (usually a broken wire, an unplugged connector or an open coil), not a reading out of range.
FMI 5: current low or open circuit
Too little current. Usually a broken wire, an unplugged connector, or an open coil. (SAE J1939-73: Current below normal or open circuit.)
How urgent it is
Schedule it. Put it on the next service. Watch for it to come back.
What to check first
- Look at the plug and harness at the wait-to-start lamp for rubbed, pinched, wet or green pins.
- Check supply voltage and ground at the plug (or the coil resistance on a valve or heater).
- If the wiring is good, replace the part.
Plain-words guidance for a foreman, not a repair procedure. Makers add their own codes and steps; the machine's service manual wins.
Next time, Dozer catches the code when it fires.
Plug a CAN logger into the machine's J1939 port, or connect the telematics you have. When a code fires, Dozer opens a repair ticket with the meaning, how urgent it is and what to check.
- The code, the machine and its hours on one ticket
- Severity sorted: keep working, plan a stop, or stop now
- The mechanic gets the checklist before they drive out
- Repeat codes on the same machine get flagged
LIVE EX-04 · SPN 3251 FMI 0 · plan a stop today Photo is an AI-generated stand-in, not a customer site.
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Questions crews ask
What does SPN 1081 FMI 5 mean?
Wait-to-start lamp circuit: current below normal or open circuit. An electrical fault (usually a broken wire, an unplugged connector or an open coil), not a reading out of range. FMI 5 means: Too little current. Usually a broken wire, an unplugged connector, or an open coil.
Can I keep running with SPN 1081 FMI 5?
Schedule it. It can wait for a planned stop, but don't let it ride for weeks. If the machine derates or the stop lamp is on, stop.
What should I check first for SPN 1081 FMI 5?
Look at the plug and harness at the wait-to-start lamp for rubbed, pinched, wet or green pins. Check supply voltage and ground at the plug (or the coil resistance on a valve or heater). If the wiring is good, replace the part.
How do I clear SPN 1081 FMI 5?
Fix the cause first. Most codes go inactive by themselves once the condition is gone and the engine has run a key cycle or two. Clearing it with a service tool without a fix only hides it until it comes back.
Which machines show SPN 1081 FMI 5?
Any diesel that speaks SAE J1939: excavators, dozers, loaders, haul trucks, generators and on-road trucks with Cat, Cummins, Deere, Komatsu, Volvo, Kubota, Perkins and other engines. The SPN means the same thing on all of them; the fix steps can differ, so check the service manual.
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