Your Onan 5500 generator's fuel pump chatter and dual light illumination indicates a control board communication error triggered by the remote harness connection. This comprehensive guide covers diagnosis, repair steps, and prevention strategies for all common Onan 5500 issues.
Troubleshoot and fix random grey water tank blockages. Covers causes, cleaning methods, and prevention for smooth RV waste water drainage.
All headlights out with other lights working points to headlight relay or combination switch failure. Check and swap headlight relay first - if no change, the combination switch is likely failed. Common issue on late 90s Ford chassis.
Consistent 2-minute shutdown under load indicates fuel delivery cannot keep up with demand. Check fuel pump, bleed system, verify no restrictions. Also check if generator is undersized for AC load - may need soft start on AC unit.
When your HWH 625S slide solenoids work manually but not from the switch, the issue is likely in the control box wiring or internal components. You can bypass the control box by connecting switch wires directly to solenoid wires, but proper diagnosis should be done first.
Given your experience and the 27-year age of your fuel pump, replacement is wise preventive maintenance. Most RV owners report good results with quality aftermarket pumps from reputable suppliers.
Yes, you're absolutely on the right track - your testing clearly points to a PCM failure in the ground switching circuit for the drivers side coil bank. The fact that you have +12v but no ground pulse during cranking confirms the PCM isn't completing the circuit.
On the Ford V-10 engine, the temperature sending unit is located on the front of the engine block, typically on the driver's side near the thermostat housing. It's a brass or plastic sensor with a single wire connector.
Steps not locking out usually means failed lock switch or control board. Test lock switch with multimeter and check for click when toggled. Replace if no continuity change.
Speedometer stopping at 39 mph with working cruise indicates a stepper motor failure in the cluster. The motor can be replaced for $15-30 with soldering, or send cluster for professional rebuild.
Norcold 1210 not cooling without error codes indicates cooling unit failure. Controls work but ammonia system failed. Verify by checking heat source working but no cooling. Replace or repair cooling unit options.
Your Onan 7000 generator fuel pump is receiving only 9V instead of the required 12V, causing starting issues. This voltage drop is typically caused by corroded connections, faulty control board, or wiring problems in the fuel pump circuit.
Rear air bags not dumping fully indicates a stuck exhaust valve, check valve issue, or height control valve problem. Listen for air exhausting when dump is activated. Check for obvious blockages and try manually releasing air via Schrader valves on bags.
For Vermont Lippert service, try mobile RV technicians, marine shops, or call Lippert directly for nearest authorized service. Before service call, try manual override and check fuses/connections. Lippert tech support can often diagnose remotely with error codes.
Oasis tankless needing daily reset likely has a control board relay issue. As a workaround, install a timer to auto-cycle power each morning, or plan control board replacement.