Hi there,
I'd say the first step for you is to always tackle it yourself.
Here's how I would take this one:
Spray Nozzle won't retract:
Open the cabinet below the sink and see what is going on with the faucet hose. Have a flashlight ready if needed and while you are under there, using your hand, snug up the connectors where the hot and cold water lines connect to the sink faucet. This is not related to your issue, just a good idea. Do the same with the fittings on the bathroom sink too. Back to the issue, look to see if there is any sort of weight that is wrapped around the faucet hose. It may be mounted in a spot that is not optimal for your application. Look too for the faucet hose getting snagged or hung up on the drain pipe, P-trap or other items under the sink. Ideally, the hose should be able to drop down into the cabinet freely.
Step Light Not Working:
Here, you have the bulb, fixture, wiring, switch and fuse to consider. Has this light ever worked? If not, I would suspect an issue in the wiring. If it has worked in the past, I would suspect the bulb. Start by turning the light switch on. Then pull off the cover for the light. Is there a bulb in the fixture? Does the bulb look blackened at all? Shine your flashlight beam into the step light bulb. Does the filament look like it is intact or is it broken? Check the wiring inside the fixture. Does it all appear to be connected? If you have a volt meter, remove the bulb and check for DC voltage where at the contacts in the fixture. If you have ~12 volts DC present, change the bulb. No voltage? -> Back in the trailer, open the 12 volt fuse panel. If your panel has the LEDs that light up red if there is a blown fuse, use this as an indicator. If not, you may have to pull each fuse one at a time to inspect them. If you do not have a blade fuse puller (plastic tweezer like device), use needle nosed pliers to pull the fuse straight out towards you. Inspect each fuse, one at a time. It the link inside the fuse looks okay, put the fuse back in the same slot it was removed from and move on. The fuse circuits may be labled with what they feed but I doubt any of them will be noted that it feeds the step light. Most likley, it is fed from the outside lights circuit or maybe the inside lights. Those are good fuses to start with. In a worst case scenario, you may have a severed or disconnected wire that feeds the light and it could be in the underbelly. Only those with the time and skills should consider pulling down the underbelly.
Best of luck and please let us know what you find on both of these. We will always be here to give you ideas.
Jim