You need a DVM or test lamp to do some checking, with the key turned to start do you have 12 volts at the starter relay? If you do and the earths are good, then the starter motor is suspect. If you do not, then there are many possibilities. The ignition switch is known to fail, other possibilities are the immobiliser or as you say the relay.
12vdc on the back 3 of what? You can pop the cover off the relay and check the contact, you can also substitute it with another one of the same colour from another position.
I'd have to look at RAVE to identify that relay.
I replaced it and the wiper work oddly enough.
If your not sure about the earth then use a jump lead from the - post on the battery to the engine.Get your dvm on the trigger wire at the starter and ask someone to turn the key.
Check for 12v at the trigger,
Then check for 12v at the large wire from the battery and then check the earth continuity between the starter to engine, starter to châssis, châssis to battery. The shorting of the terminals on the starter you can try but bloody carefully!!!
So it starts with 14v, but after 3 attempts it drops to 12.4v
Is that while you are actually turning the key to crank or after? It sounds like the battery is lacking capacity.
So it fires up and runs at the first attempt with 14v?
Either something is wrong with his DVM or he has a strange battery, it should not read 14 volts unless the engine is running.
Same thoughts, can you get the battery tested through the week ahead?
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