FAQ
TL;DR: Iveco Daily 2.8 fan dead? "Power supply from fuse 31"; EDC uses relay 25336. Non‑EDC 35C11 switches the electro‑clutch directly via the radiator sensor. Confirm feed and the radiator switch path before chasing the loom. [Elektroda, Hart3, post #17276334]
Why it matters: This helps Iveco Daily 2.8 owners quickly restore a non‑working fan clutch by checking the correct fuse/relay path.
Quick Facts
- 35C11 2.8 (non‑EDC): feed from Fuse 31; radiator switch drives clutch; no relay. [Elektroda, Hart3, post #17276334]
- EDC variant: relay 25336 controls the clutch; feed remains Fuse 31. [Elektroda, Hart3, post #17276334]
- Proven field fix: 5 A inline fuse from sensor to solenoid; coolant stabilized near 90°C. [Elektroda, piorom3, post #17313229]
- Coil options: 2‑pin or 3‑pin; A/C cars use 3‑pin; burnt‑plastic smell signals coil failure. [Elektroda, Megawe, post #17285544]
- Harness watch‑outs: engine‑bay relay box present; wiring near the brake servo often damaged. [Elektroda, Megawe, post #17285605]
Is the Iveco Daily 2.8 fan "viscous" or electromagnetic?
It uses an electromagnetic fan clutch, not a viscous unit. The radiator temperature switch feeds the clutch directly in simple setups. No relay is needed in that basic layout. [Elektroda, Hart3, post #17272574]
Which fuse powers the fan clutch on a 2001 Iveco Daily 35C11 without EDC?
Fuse 31 powers the clutch. On the shown board, it is second row from the bottom, left position. Non‑EDC 35C11 models switch the clutch directly via the radiator switch. [Elektroda, Hart3, post #17276334]
Do I need a relay to drive the fan clutch?
No. "The sensor in the radiator is designed for direct switching, without the need for a relay." Wire the clutch through the radiator switch. [Elektroda, Hart3, post #17287443]
How do I quickly test the radiator switch and fan clutch circuit?
How‑To: 1. Verify power is present at the radiator switch. 2. Temporarily link the switch output directly to the fan clutch feed. 3. Start the engine and confirm the clutch engages. This reproduces the intended diagram. [Elektroda, Hart3, post #17285685]
What should I check if shorting the sensor plug doesn't start the fan?
Check for power at the sensor and continuity to the clutch. Inspect the engine‑bay relay box and the loom near the brake servo. That area commonly fails and interrupts the feed. Repair breaks and retest. [Elektroda, Megawe, post #17285605]
Can a faulty fuse board cause low voltage at the clutch?
Yes. Fuse centers with foil copper paths can overheat and cause voltage drop. The clutch then sees weak power and will not pull in. Inspect for heat damage and high resistance, then repair or bypass. [Elektroda, Hart3, post #17272574]
How can I wire a working fix if the original loom is mixed up?
Feed the radiator sensor, then route its output to the clutch solenoid through a 5 A inline fuse. Ensure a clean ground. This setup restored fan control and held coolant near 90°C in practice. [Elektroda, piorom3, post #17313229]
How do I identify the correct fan clutch coil?
There are two coils: 2‑pin and 3‑pin. A/C‑equipped vehicles use the three‑output coil. Coils are costly; a burnt‑plastic smell indicates failure. Replace with the same type as your harness. [Elektroda, Megawe, post #17285544]
Where exactly is Fuse 31 on this fuse board, and are my fuse values right?
On the shown board, the lower‑left green fuse was tied to this circuit. Ensure fuse colors match pictogram colors. Oversized values appeared installed; correct ratings before testing. [Elektroda, Hart3, post #17278329]
My fan engages with a direct battery feed but won't release after shutdown. Why?
That indicates you bypassed the control path. A direct feed can hold the clutch engaged abnormally. Reconnect through the radiator switch and correct fuse feed to restore proper disengagement. [Elektroda, piorom3, post #17271053]
Is there a simple wiring diagram I can replicate without tearing the loom?
Yes. Battery feed → radiator temperature switch → fan clutch solenoid → ground. "Supply power to it and connect the output with the fan clutch." Keep runs short and connections clean. [Elektroda, Hart3, post #17285685]
How can I tell if the fan clutch coil has failed?
Smell for burnt plastic near the clutch. That odor points to a burned coil. Replace the coil with the correct 2‑pin or 3‑pin type for your setup. [Elektroda, Megawe, post #17285544]
Can you tell me which fuse 23 is? There is no numbering on the fuse board, only illustrations. Fuse switch on foil in this year? I did not unscrew it but I see only ordinary cables there
