2010 Astra J - Cooling Fan issue

[Madal101_uk]

Hi, I’m having a problem on my 2010 1.6 Sri Astra J.
The cooling fan is running all the time, even on motorway driving, it won’t shut off.
I’ve had a diagnostic tester on and it flagged up the following code.

P0480 - Cooling Fan Relay 1 Control Circuit

So far I’ve replaced the following:
- the sensor at the bottom of the radiator
- the expansion tank (with sensor)
- the thermostat with built-in sensor

I’ve also checked the 3 relays for continuity and operation with 12v supply, and noted they all work perfectly off the car, which suggests when fitted one or more are receiving power.

I don’t have access to an electrical diagram for the cooling system, which is making further troubleshooting difficult.

Anyone have an idea what to do next?

[Rusty2009]

I will try and get you some info tomorrow.

If not drop a message back here & I'll get onto it.