2007 Sahara horn is faint sounding

It appears to be a well documented issue!

https://www.google.com/search?q=2007+sahara+unlimited+horn+relay+location

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You have 2 horns,high and low,check out the connections there and the ground,could just be loose,not normal for horns to go out at this year.Have some one blow horn and listen to both to make sure both are working,One might be bad,or connections are rusted,get sand paper and rough up to get better connection,if this don't work,guess what,as you know,horns are not cheap,replaced mine on my 85 Nissan 720 4x4.Now they are loud.

I do not want to be wrong with my answer but it sounds like the idle control solenoid may be buzzing or the chamber it operates in needs to be cleaned with WD40. Sometimes when a solenoid routes vacuum to a part and sticks, the vacuum is going where it never was intended to go and makes noise. You might want to look at vacuum routing or things like the air horn or if the air cleaner is connected completely around its mount.

Could be either a loose belt or you are low on power steering fluid,or the power steering pump could just be worn out.

The steering wheel horn pad/button doesn't have enough clearance. In very cold weather, the contacts touch, sounding the horn. Replace or repair the horn pad

Replace the horn(s). Some have one, some have two.

If you hear the relay clicking,and even faint horn, check the connections on the horns themselves, there are probably two. If they seem okay then take a piece of wire and jump from +power to the horn terminal. Be prepared because if it works it will be very loud, and I know more than one person who's hit his head on the hood doing this. If it doesn't work, replace the horns. Hope this helps. Cheers.

sounds like the blower fan. what type of chevy is it. a full size has the fan on the passenger side firewall. should be easily accessible. just disconnect the wire and test the car. if it stops making noise , that is the problem, also turn on the fan speeds to different settings, if if changes sound , that is the problem

its your blower motor for your heat and ac bearings faulty replace blower

That's not a remote starter on your key chain, it's a keyless entry for an alarm system.