The relay that controls the F1 pump in a 360 is a weak link in the system. Over time the relay contacts can overheat as a result of arcing between the terminals and have been known to weld shut. If they do weld shut then your F1 pump will run continuously and burn out.
The Challenge Stradale uses a 50A relay instead of the standard 30A but the pin configuration is different so upgrading is not possible without converting the socket as well.
It is worth replacing the relay periodically in order to help prevent damage to the F1 pump. The part number is 155437 and it lists at aorund £35. Fitting is very easy….
1. Isolate power using switch in bonnet.
2. Remove access panel behind drivers seat (RHD) – four screws.
3. Pull the old relay off and fit the new one in place (see pic below).
4. Screw the cover back on and restore power. Don’t forget to wait 10 seconds with the ignition before starting the engine and allow it to idle for enough time so the ECU can re-learn it’s settings.
And here’s why you should replace it. First off a picture of the inside of a brand new relay:
And here’s a picture of an old relay with burnt contacts:
A closer look at those burnt terminals:
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