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twr7cx
15th January 2015, 10:47 AM
The front electric seat in my D2a HSE keeps blowing the 40 amp fuses. When I replace the fuse, the seats electrics operate perfectly but then a few days later I will find that the fuse has blown again. Is this an indication of a worn/damaged electric motor that has too high resistance or something like that?
Scouse
15th January 2015, 11:59 AM
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.
Jazzman
15th January 2015, 10:29 PM
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?
twr7cx
16th January 2015, 06:39 PM
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.


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.


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

No, the fuse blows after the seat has been moved.
Jazzman
21st January 2015, 03:54 PM
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.
Jazzman
30th January 2015, 01:43 PM
How did you go?
twr7cx
30th January 2015, 08:01 PM
How did you go?

It's on my to do list, but below:

*replace the CV joint boot which has been ripped
*find out why the passenger rear suspension is deflating
*find and fix the coolant leak

I can live with the seat not working but the above items have the vehicle grounded at the moment.