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Car Saver/Fail Safe question

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Revo Rancher

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I bought teh "Car Saver" from HTM today. It works just like any other fail safe sensor.

Anyhow, the instructions are generic and do not take in account the fact that the Revo has the OptiDrive unit.

Instructions say to install into the wiring between the receiver and the steering servo. In the case of the Revo, the receiver wiring goes first to the optidrive and then from there it goes to the steering servo. It looks like I can install the car saver in-line at the receiver and the plug the original line into the saver, before it goes into the OptiDrive unit. (I know, maybe I confused some)

Will this set up work? Or does the fail safe have to be after the OptiDrive? It is almost impossible to add one after the O-D due to the plug configuration.
 
Thanks JetMech. Saved my butt again. If we ever race, I hope we win 1 and 2!

While I waited for a response, I flipped through my RCCA mag and noted that the unit is a similar to the OFNA compact 'Failsafe' unit, and the plugs and wiring is about the same.

On Edit:

Well, it looks like the HTM brand is going to be the exception to the rule. It did not work. It jams the shifting servo hard over to a second gear shift. If I reverse any or both of the plugs it goes into fail mode.

Q: Since this is a Revo forum, do any of you REVO owners use a failsafe, and if so, what brand, where did you get it and where does it connect in your system?
 
Rolex, sorry, a few missing words. When I turn on the transmitter, then turn onthe receiver, that is when it jams over the shifting servo. The plugs are marked quite clearly. The gray plug is for the throttle. I may be wrong, still, though.

ON EDIT:

OK, just checked it again. (got to bring home the laptop from the motorhome, too far to keep going from garage to upstairs office!)

Green plug on receiver is hardwired into green location on O-D unit. Gray plug goes to gray location.

Must be the brand of fail safe.

Revo owners, if you have a fail safe, how is it wired (colors please) and who makes it?!
 
I don't have a Revo, but it shouldn't be moving the shifting servo if it's correctly wired. Take out the fail safe, restore the wiring to stock, check everything out, then re-do the failsafe, making sure that the plugs are in the right place.
 
Rolex, I did do that, twice. I even mixed the wiring around by flipping the plugs over to revers the wiring order. Reversing the plugs in any way made the failsafe go into safe mode immediately upon turning on the receiver, and otherwise it did the shift servo thing.

I think I will go get an OFNA. (unless someone gets the answer first.)
 
Okay, just hang out a while and wait for someone with that unit to give you the right info. Now I'm curious as to what the problem is.
One last thing to check. Sometime they 'wierd' out when the antenna is too close to the reciever. Try it at normal distance, rather than with everything close together. Just a thought. I was working on someone's car last week, and servos went wierd. I thought someone was on that frequency. The radio antenna was next to the car, on the ground. When I picked up the radio, everything was fine.
 
Check and make sure you are wired right at the receiver. You may be crossed there. I'm pretty sure throttle out to OD should be channel 2.

Or just order the FOC and get rid of the optidrive. If you want to live on the wild side though you can remove the optidrive and just run without it. You can actually do that though to make sure you failsafe is working and not the problem.
 
Last edited:
Revo Rancher

I have the OFNA Failsafe on my Revo, unplug the throttle connection (think its called throttle in) on the opti-drive, plug it into the female connector on failsafe and then plug the male end back into the optidrive, once this is done switch everything on push the trigger forward to apply the brake and then press the set button on the failsafe to tell it what to do, worked perfectly for me, test it by switching the transmitter off, the brake should be applied immediately, hope this helps
 
Well, went to Hobby People today. Spoke with a guy who actually knows something. He confirms the HTM brand will not work for the Revo. They do not carry OFNA. I will put the HTM into the new T-Maxx and go get an OFNA for the REVO.
 

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