throttle safety switch - Snowmobile Forum: Your #1 Snowmobile Forum

SawBlade · 12-16-2007, 09:50 PM

Does my 79 AC jag have a throttle safety switch? here is what happens. when starting it acts like it has no spark if you dont touch the throttle. move the throttle just a little and it fires fine. when running, if you let off the throttle all the way it immediatly dies. move the throttle just a little and it idles fines. seems like there is a kill switch when the throttle is let go ( take your hand off the grip). as long as you move the throttle just a tiny bit off rest it purrs like a good little kitty. didnt think 79s had a throttle safety switch but maybe they do. any help. havnt started disconnecting any of the wire leads yet. just thought id ask you in the know.

**RJ Gleason** · 12-17-2007, 03:23 AM

There should be a little slack (1/4 inch) in the throttle so that it does not press against the button when it is running.

SawBlade · 12-17-2007, 08:36 AM

is disconnecting the cut off switch (throttle safety) the best solution?

Piped_ZRT · 12-17-2007, 12:34 PM

I've got the same issue with my 96 ZRT800. When pushing the throttle a tad, it is fine but "idles" at 3000 rpm. When the throttle lever is off and I manually push it in with a screwdriver, turns over and fires and idles fine at 1500rpm. How can I just disable this? I think the best solution is either get a new throttle block or disable it and wear the tether when starting - although not recommended.

justride · 12-17-2007, 12:40 PM

I had this problem with my 2000 thundercat when riding along at 1/4 throttle it acts like i hit the kill switch then i let off and it is fine and sometimes it lets out a very loud backfire. I know that on my sled it is the purple wire that you cut to bipass it i have not cut it i just unplug it so i have no kill switch.

Piped_ZRT · 12-17-2007, 12:44 PM

Quote:

Originally Posted by justride

I know that on my sled it is the purple wire that you cut to bipass it i have not cut it i just unplug it so i have no kill switch.

See my problem is that in my throttle block, the wires don't just plug straight in. I have to get the throttle block off the bars in order to take it apart and unplug it. I just always try to be conscious about it and keep the throttle revving a little bit. Huge pain in the ass.

How can I get around this?

justride · 12-17-2007, 12:50 PM

There has to be some wires coming off the throttle block

Piped_ZRT · 12-17-2007, 12:51 PM

There are, but they are up inside it and I'd have to take it off the bars in order to get to them - I don't want to do that.

justride · 12-17-2007, 12:54 PM

man that sucks not sure what to tell you

I can't believe the wires are that different from a 98 to a 2000

justride · 12-17-2007, 12:55 PM

did you take off the pad that is on the bars?

Piped_ZRT · 12-17-2007, 12:58 PM

There isn't a pad on the 96 800, just a rubber cover that comes off. I can see the 3 wires but I'm not sure which is the middle one. Theoretically, if I cut the middle wire, that will disable the TSS and off she'll go, correct?

justride · 12-17-2007, 01:00 PM

Yes and you will still have a kill switch but MAKE SURE THAT IS THE ONE before you cut it.

justride · 12-17-2007, 01:01 PM

what color are the wires

Piped_ZRT · 12-17-2007, 01:02 PM

It's always the middle one, right?

I'm not where my sled is right now, so I can't tell you the colors.

justride · 12-17-2007, 01:04 PM

i can not be for sure that it is always the middle one on my sled it was. If you can tell me the colors of the wires then we can find the right one

IHI · 12-17-2007, 10:51 PM

Quote:

Originally Posted by justride

i can not be for sure that it is always the middle one on my sled it was. If you can tell me the colors of the wires then we can find the right one

I hate to thread steal, but i need to jump on this quick. I folled my 3 wires down to the plug, wires are yellow/black, red/black, and red/blue. CLICK HERE for what mine has.

I did the heat shrink over the center post...but it cuts out my fuel pump, so obviously /i cant start it without a fuel pump to feed fuel. I then kept reading about the "yellow wire" so i then installed some shrink wrap over the yellow post and plugged it back in, fired it up and something was very amiss as it could'nt even get enough gas/throttle for the sled to move?

So Im back to square one, and will pull the plastic off everything and start tracing wires and see what i see. I was thinking maybe i need to make a jumper wire of some sort but i dunno. So I'm open to any suggestions at this point.

IHI · 12-17-2007, 10:51 PM

Quote:

Originally Posted by justride

i can not be for sure that it is always the middle one on my sled it was. If you can tell me the colors of the wires then we can find the right one

I hate to thread steal, but i need to jump on this quick. I folled my 3 wires down to the plug, wires are yellow/black, red/black, and red/blue. CLICK HERE for what mine has.

I did the heat shrink over the center post...but it cuts out my fuel pump, so obviously /i cant start it without a fuel pump to feed fuel. I then kept reading about the "yellow wire" so i then installed some shrink wrap over the yellow post and plugged it back in, fired it up and something was very amiss as it could'nt even get enough gas/throttle for the sled to move?

So Im back to square one, and will pull the plastic off everything and start tracing wires and see what i see. I was thinking maybe i need to make a jumper wire of some sort but i dunno. So I'm open to any suggestions at this point.

SawBlade · 12-17-2007, 11:32 PM

It is the middle wire on the 96 zrt. the other one with the electric fuel pump must be a EFI. not the same. On my 95 zrt i delt with this last year. my kill button broke off two years ago and my throttle safety switch acted up last year. here is what i did. I cut the three wires leading to my throttle block and then taped all three together. never had a problem since. My question on this thread was on my 79 jag. does it have a throttle safety switch and i found out, yes it does. I can disable it or replace it. in the interest of time i will probably disable it by cutting the wires and taping them together.

IHI · 12-17-2007, 11:40 PM

Quote:

Originally Posted by SawBlade

the other one with the electric fuel pump must be a EFI. not the same. On my 95 zrt i delt with this last year. my kill button broke off two years ago and my throttle safety switch acted up last year. here is what i did. I cut the three wires leading to my throttle block and then taped all three together. never had a problem since.

So with my efi deal, i can essentially make a harness and unplug the 3 wire connector i have a pic link for above at the column, leave the tail coming from the throttle assembly hanging loose, and then on the engine side connect all three of those wires together? I have a 4 flat trailer harness laying somewhere, so if it's as simple as just making the 3 wires on the sled side touch, I'm all over it, but i want to make sure that's the deal so i dont burn up and ecm??

SawBlade · 12-17-2007, 11:48 PM

Not sure on the EFI. Sorry im not much help to ya. Post an EFI question and ask about the throttle safety and im sure one of the many EFI experts can answer that question.