HELP!!! DEX410 electrical problems

[dasbo]

Hi folks,

I am having a hell of a time with the electrics in my Durango at the moment. I have an intermittent fault which is causing me a lot of DNF results.

Basically, my car will cut out without warning and I will lose all power, even steering. On picking the car up, I notice that the speedo power light is on, but the receiver light is not. If left on, it will come back to life after anything from 20 seconds to 20 minutes. Its got so bad that I recently had to borrow another car to be able to compete at a local meeting.

Over the course of the last 3 months I have tried combinations of two 6.5 motors (one brand new), three speedos (Nosram Pearl ITSC - brand new, my spare LRP SPX super reverse and LRP SPX Stock Spec from my TC) and two receivers (Futaba 603FF and 603FS from my TC). I have also made sure the connectors which plug into the receiver are on properly, and that the motor sensor lead has been replaced. The only thing I havent changed is my Futaba 2.4Ghz transmitter and Demon lipos.

I thought I had it cracked after having more than a dozen 5 minute test runs last week (after installing my LRP Stoc Spec speedo from my TC) but unfortunately it happened again this weekend. My temperatures after a 5 minute run (checked everytime) are well within limits so it cant be a thermal shutdown. I am not a complete novice but this has got me stumped.

Has anyone got any ideas, as its getting to the stage where I'm seriously thinking of giving up offroad, even though I prefer it to TC, and love the car.

[Northy]

What track surface do you race on?
Does it do it as you hit the face of a jump?
Does it do it as you land from a jump?
Does it do it at random points on the track?

G

[JohnM]

It's not something really silly like a dodgy link wire between the LiPos is it? I've had some gip with mine (crap soldering skills).

[dasbo]

Hi Northy,

Thats a blistering quick response.

Its run on a grass track (and garden) and will happen on a flat section without any jumps, so I'd say its random, which is why its so frustrating.

Cheers,

[Bungleaio]

I doubt it is the lipos as they are just a power source, if the speedo light is on then the power is flowing.

It could be the transmitter becoming unbound or not sending a signal out to the reciever hence the light going off. does the transmitter have the same issue with your TC?

Also check the aerial position, mine is very close to the main battery cables and the car would cut out occasionally, I pulled some more wire through so it was coming out of the top of the tube and it seems to have cured it.

[Northy]

My first thought was static if it did it on the face of a jump on a carpet or astroturf track

So... other than a bad connection, not sure now. Could even be a bad connection INSIDE the lipo, so worth trying a different one if you can borrow one?

G

[DCM]

have you checked the temp of your receiver?