I need replacement parts for little tikes.

What kind of tractor?
Is it power steering? If so, did the belt break?
Tractor steering is usually really simple, with exposed parts.
Some of the older manual ones had gears that would get worn and could "slip" over a tooth. Made the front wheels not line up.

If you can't find the problem send some more info.

This ride on fire truck is a modern update to classic pedal cars with a fire truck theme. Kids will love coming to the rescue in this foot to floor ride on with a real squirting hose. Super tough construction makes this an ideal outdoor toy - the body will never rust!

First- to drain ,you can reach the drain valve,from the pass side,if you lay on the ground and reach up to the radiator. You do not even have to raise the vehicle up
Second- mix Yellow GO5 Coolant about 50/50 or 60/40. Do not use Green in a Ford or Orange GM
To Fill- Remove the front two plastic screw type buttons,from the engine cover
-Remove the cover
The radiator cap is on the front of engine,on top,it is plastic
Remove cap and that is your fill point
Run engine to warm and get thermostat open,as you would with any vehicle
Top off coolant,replace cap
VERY IMPORTANT-next to the Power Brake Booster,and just under it,is a BLEEDER HOSE;to let air out of system. Turn screw slot ,only a little,DO NOT REMOVE SCREW. When coolant runs out close.
Fill-Degas Bottle,to full line,with coolant.
Check the next couple days on resevoir level ( Degas Bottle)

as always it's a plstic clips , if you brake them pulling panel out you can replace them , there also few screws , i think on door handle and lock handle.
use plastic spoon or wide screw driver to pop the panel out.

I had the exact same problem w/ my 2001 Jeep Grand Cherokee. Fairly simple fix. It is the flasher relay, OEM Mopar Part #4686094, pay around $45 for the part at the dealer.
Take kick plate trim off (3 screws and clips holding it on) remove fuse cover (pops off) remove plastic shroud in front of steering wheel below the instrument gauges(pops off) remove large plastic shroud under steering wheel, (2-10mm bolts, clips and one phillips screw holding in place). Relay will be above fuse box, very tight fit but with a little nudging and nimble fingers pop out the old relay and replace with new one. Re-install all equipment in reverse order. Solved my turn signal problem immediately. Good luck

There is the dealer which i believe is around $200.00 and there is the DIY which will cause you to have many bad words to be used.
On a scale of 1-10 (10=engine rebuild), I would score it a 1.5. Here is a general approach, not intended as a detailed procedure.
1. Remove front wheel well front half splash guard, each side. There are about 2 screws and the guard pulls forward to seperate from the rear half. 2. After removing the splash guard, you can access one screw that attaches the front fascia, each side. 3. Then about 6 plastic push pin type screws along the bottom, underneath. 4. About 5 push pin type screws on the top. 5. Fascia should then simply pull forward. It is a bit bulky and an extra pair of hands is helpful. 6. Then there are 3 screws to remove the headlamp assembly. Unclip the wiring harness. 7. Then 4 screws to remove the bulb access cover plate. Bulbs are 9005 for high beam and H11 for low beam. Replace the little bulb.....I think it might be H3.
Here is another way:
For the fogs, need to remove front wheels and then remove the plastic wheel well liner (plastic push pins hold it in place).
For the small bulbs in the inside corner of the headlight housing: Open hood. Remove air cleaner box for drivers side bulb access.
For the passenger side, need to loosen the fuse box. Open cover, there is a deep nut that you need to get to with an extension. Then fuse box will be able to be pushed to the side so hand can fit to access back of light. You do not need to unplug any electrical connections, as you do not need to remove the fuse box.
On the back of the headlight housing there are two light gray plastic covers, one behind, and one toward the center of the car. The one toward the center of the car needs to come off, I believe there is just one screw holding it on. Once this cover is off, I believe there is a little holder that twists off which has the bulb attached.
The most difficult part is getting the bolt off that is deep down in the fuse box behind the passenger light. I believe I had to use a 8 inch extension with a angled socket attachment to get to it. I used masking tape to tape all the pieces of the socket apparatus I made together so that they would stay together and fall down into the fuse box (socket set isn't the greatest)
Good luck and hope this helps.

Two special tools are needed: steering wheel puller and lock plate depresser. Both available at auto parts store for $20 or less. This is how I got to mine on a 1987 Corvette. It has a special steering wheel, but this should work for you too. Pull steering wheel. Remove plastic cover (no tools needed). Depress lock plate with special tool. With 2 screwdrivers, or 1 screwdriver and needle nose pliers, pop the little ring out of the channel towards you. This ring was holding the lock plate down. Loosen the lock plate tool and bring lock plate out. Philips screwdriver to take hazard light switch off. One phillips screw holds the turn lever to the switch. Set the small metal arm and screw aside. Three philips screws hold the turn indicator switch (plastic ring). Carefully tug the switch towards you. There should be just enough slack in the wiring that you don't need to unplug it below the steering column, but it's close. Leave the switch dangling in front of the steering column. You're almost there! There's another screw that holds the ignition switch in. Remove that screw and the ignition switch. Replace everything

To relive the fuel pressure look under hood on drivers side front of engine locate the fuel line where it goes into the fuel rail,trace it back a little ways and you will see a schrader valve for checking fuel pressure. Remove the plastic cap and take something like a small screw driver and press the pin in center to release pressure.
To replace fuel filter you have to remove left front wheel and inner plastic fender panel and fuel filter is located behind this at the back area.

The front couple bolts (enough to fold the inner fender wells) on the fender wells (plastic part around inside the wheel well). Take them out, I think i did 6. Basically, just do what you have to do to fold the front part of that plastic inner fender well enough to see behind the parking light, then you need to remove the parking light/corner light assy. and once they are out you can reach the final screws required to remove the headlight trim rings. Also there are a few people on EBAY that are selling replacement headlight/parking/corner light assemblys that have clear outer lenses that dont get all yellow and foggy as the stock ones do. I bought smoked ones that have a light tint to it and they have projector caps so you can use HID kits and get a nice beam. something you might want to look into if your going to do the trim rings since its kind of a p.i.t.a.