Radical SR3 Fuel Switch

[Moffi]

Hallo there,

I collected my '07 SR3 with 1300ccm and MBE ECU last weekend and I'm curious about a switch on the dashboard I couldn't figure out what it does exactly and I didn't want to use the try& error method.
Can anybody tell me what the "fuel switch" is doing (the one with the petrol pump icon underneath)?
As the fuel pump is priming when I switch on the ignition I don't think it's a safety switch for fuel pump, but maybe something like a "reserve" on motorcycles or a manual override for it.

I checked the wiring diagram at Tilling Motorsports but as I'm not an electrician I couldn't figure it out exactly.

Thanks in advance for any Input. Keep on racing!

Best regards

[Coldaswell]

I have an 04 car and I'm not convinced it does anything, but I still use it just in case!
It would be nice to know.....

[BertBert]

Does it run the fuel pump independently from the ignition switch for pump out purposes?

[Ron V]

I have an 05 and an 06. I too am convinced it does nothing. Both cars the pump comes on and primes the system with the Ignition switch. Then stops and waits for the crank trigger to turn the pump on full time.

On a lot of early model cars I think it became redundant at some point..........

Having said that I still always turn it on........but really, it does nothing.

Ron

[Moffi]

Thanks everybody!

I rechecked the wiring diagram and the only wire running from the fuel switch is connected to the rectifier pack (and to the chassis earth pole).

Anyway I asked the asked the technical staff at Radical UK about that switch, they said the switch was fitted to the SR3's, when the ECU had no control over the fuel pump. Since the ECU has this capability there was a time, when it was fitted "just in case".