Thread: Passenger front electric seat blowing 40 amp fuses

I'd be checking the wiring under the seat first.
Does the fuse feed both seats or just one? If one, it will help narrow the fault down.

Does the HSE have heated seats? If it runs OK then blows later it would indicate something that isn't constantly operational. I assume the seat does not move frequently, if this is the case a thermostat type thing can do it, if heated or a heating element (not sure how how or if they are heated seats).

Otherwise it might be something simple as a loose / exposed wire. It normally is something simple.

The key question is, are the seats moving when the fuse blows?

Originally Posted by Scouse

Does the fuse feed both seats or just one? If one, it will help narrow the fault down.

Each seat has it's own individual fusing.

Originally Posted by Jazzman

Does the HSE have heated seats?

It does but I don't think they work at all. I certainly haven't felt any heat from them when I've pushed the button. From what I have read the heating elements damage easily.

Originally Posted by Jazzman

The key question is, are the seats moving when the fuse blows?

No, the fuse blows after the seat has been moved.

From that information, I'd disconnect the heating elements to see if the problem persists. If you don't use the heater anyway no need to have it connected.


40 amps is a large value fuse. It must be a large current draw to blow. If the fuse is melted when you remove it there is a good chance it takes a long time to blow, possibly a partial short also consistent with possible heater failure. If it is not melted then perhaps you have a direct short circuit. This would be a wire with damaged insulation normally or a short circuit motor.

How did you go?