Also found this. No clue what it is for?

 

Etc switch on the throttle housing is trash. The pic of the broken cable looks like what's left of the starter interlock/brake light cable that mounts on the left brake control. What this jerry rigging with wiring that some one has done,don't have the foggiest idea what they were attempting.Could be they remove the fuse holder.. Think I'd order new parts and try again.

 

What's your suggestions? Its a birthday surprise for my son on the 15th of this month.

 

If you downloaded the manual I suggested that has the wiring diagram,then you need to get to ordering parts pronto that you at least know you need. Problem is the etc switch is part of the throttle housing. You can get the starter interlock/brake light switch and wire a fuse holder inline by using the wiring diagram in the manual.Only alternative to that is buy a complete wiring harness.2003 A03EA09CA SCRAMBLER 90 Polaris ATV Parts Plus either get a used throttle assy or a Chinese replacement that has he etc switch.OEM Polaris Front Brake Lever Throttle Assy 0451096 Sportsman Scrambler 90 | eBay Thumb Throttle Brake Lever For 50 90 cc ATV Polaris Predator Sportsman Scrambler | eBay

 

So if I use the jump box to power the brake wire that is unhooked, then use my car to jump the bike it turns over. I'm still not getting spark.

 

Don't try jump boxes,bypassing switches etc.If you don't have spark,go through the stator and other ignition checks from the manual. You have multiple problems on this machine,a lot from the previous owner.Either repair it right or find your child a running machine for his birthday.

 

I'm not trying to bypass it permanently, just trying to troubleshoot. I will be ordering the brake interlock today.

 

In the first pic you posted,the etc switch in the throttle housing can kill spark no matter what else you try to do.. It needs to be solved along with the interlock/break light switch that sends power to the starter relay (located under the seat) and then to the starter.Everything has to work together on these little ones.

 

What was wrong on the throttle switch? I just had it out looking at it. I'm looking at the service manual and don't really see a good picture of that switch.

 

It needs to be hooked up to find out if it is ok. Plus looks like the plunger is missing. From the service manual:

1. Slide boot off throttle cable adjuster and jam nut.
2. Set parking brake.
3. Start engine and set idle to specified RPM.
NOTE: Be sure the engine is at operating temperature.
See Idle Speed Adjustment.
4. Loosen lock nut on in-line cable adjuster (Ill. 1).
5. Turn cable adjuster out until engine RPM begins to
increase.
6. Turn cable adjuster back in until throttle lever has
1/16″ (.16 cm) of travel before engine RPM
increases.
NOTE: Be sure ETC switch plunger is held inward by
throttle cable tension (see ill. 2).
7. Tighten lock nut securely and slide boot completely in
place to ensure a water-tight seal.
Idle Speed:
600 ± 200 RPM