No signs of life in 2nd hand servo

[colmo]

I bought a KO Propo 2113 FET servo from another Oople member, and just got around to fitting it in a car.

Alas, the servo showed no signs of life when I powered up the car or tried the steering wheel.

I was careful not to plug it in with reverse polarity.

What is the most likely explanation (apart from 'It's dead, Jim')? Is there anything I could do to test it?

[losixxx]

have you wired up the fet lead to the ESC?

[colmo]

Aha, that's what that spare wire was...no, I haven't - where does it attach? (sorry, noob alert)

[Mike Hudson]

it connects to the positive terminal on your esc or the fet wire wire on the esc if it has one with a fet choke connected inbetween

[Southwell]

You must get a fet choke for it or you risk getting interference.

[colmo]

Originally Posted by Mike Hudson

it connects to the positive terminal on your esc or the fet wire wire on the esc if it has one with a fet choke connected inbetween

Either way, is the FET choke necessary?

Edit:

Originally Posted by Southwell

You must get a fet choke for it or you risk getting interference.

I guess that answers it.

Thanks all, I now have to get my hands on a FET choke in quick time...

I've been told the choke also protects the servo from being fried by voltage spikes.

[jasonnjane]

so the big question...are you sorted now