Wiring connections for a Cannon Chichester 10578G

We have a customer who has had their GAS SAFE engineer replace a faulty FFD for the main oven and since then the oven has not worked correctly.
Initially the “engineer” blew 2 fuses when reconnecting and the proceeded to muck about with the connections.
Since then, the top oven, grill and hob still work fine, but the main oven does not. It only works when the clock is set from AUTO to MANUAL and then the ignition is permanently sparking and only goes off when the oven is lit as it should.
We think it has been connected incorrectly but need a wiring diagram or instructions as to which colour wire goes to which connector. (4 wires from the cooker and 2 from the FFD solenoid) Before we fork out for a new Spark Generator we want one of our qualified sparks to check it and at present it would only be guesswork.

Thanks.

Andy. R&M Electrical Group Ltd.

Forgot to mention the main oven light is also not working and usually worked when the oven was lit (haven’t checked the lamp yet tho)