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edit: I read somewhere about this gauge 10A is connected to the ignition wire. When I installed the seat heater, I install the ON wire to the white ignition wire(pin 4 of connector 4F) behind the change box, instead of the one 'pink' (under the steering wheel). Not sure if that would make any difference. Is there anyway I can improve it so it does not blow next time?
The GAUGE fuse is ignition switched and is the power source for the shift lock, amongst other things. It does not have enough surplus to run the control line of your seat heaters. The pink wire at the ignition switch (per my DIY) does.