My 2007 Jeep Wrangler 4 Door Unlimited won't start up. I went to the garage yesterday, turn the key in the ignition and all the bells and whistles light up, but no response from the engine. What gives???

There is one small wire coming from ignition switch connected to the starter solenoid check for power wile one person try to start the car
If that wire get power then replace your starter

i have just bought a peugeot 306 and it is making a catching noise a man in the garage said it is one of the pulley,s what can i do to fix this

its your steering dampener. It is inadequate. If you dont get it fixed it could eventually snap your dampener off of your front axle where it is welded. This happened to mine. Jeep is aware of the problem, but doesn't like aknowledging it because it is referred to as the "death wobble." Jeep fixed it by putting an upgraded steering dampener on and i haven't had the problem since

Sounds like a short in the electrical system. Maybe even just a loose ground wire. On the other hand...It could just as easily be a bad ECM (BRAIN)! Warranty still in tact? I hope so. Diagnostic at a certified Jeep shop... Good Luck!

get all 4 tires changed and get the dam spare back off of it

Blame it on the former owners. I don't know why it is, but some(rather a lot) of people take it out and into their home to read something and NEVER put it back. The used car department isn't really responsible for it. Just like extra keys and remote. A family member trades in a vehicle and only one of them is there to do the transaction, therfore the extras are back home or in her purse. Look on Ebay or craiglist for these.

Nuetral safty switch, Starter solenoid.
Do you have antitheft?
The ground for the starter relay may be computer controlled. Lee

SUBJECT:
Long Crank Time Due To Possible Contact Of Camshaft Sensor To Camshaft Gear
OVERVIEW:
This bulletin involves the replacement of the engine camshaft sensor.
MODELS:
2007 (JK) Wrangler
NOTE: This bulletin applies to vehicles equipped with a 3.8L engine (sales code
EGT).
SYMPTOM/CONDITION:
The customer may experience one of the following conditions:
a). Long engine crank time.
b). Two engine start attempts prior to engine starting.
c). Due to the “TIP Start Feature” on automatic transmission equipped vehicles, once the
ignition key / switch has been released from the “START” position, the starter may stay
engaged for up to 10 seconds while the engine attempts to start.
The above conditions may be due to the position of the camshaft sensor to the camshaft
gear. The sensor spacer gasket may have come loose during engine assembly and
caused the camshaft sensor to be adjusted too close or in contact with the camshaft gear.
DIAGNOSIS:
If the above condition is present perform the Repair Procedure.
PARTS REQUIRED:
Qty. Part No. Description
1 04686353 Sensor, Camshaft

First, verify the actual voltage at the battery with a voltmeter. Second, make sure terminal connections are clean and secure at both terminals and the other ends of the battery cables as well. Also find the source of the noise you hear...If it's coming from a relay, find out which one now, before it completely fails and is more dificult to locate. (do not change it till you verify all connections are good and actual voltage is good.
There are a few more tests you can do but do these first.

Check the door connectors. Remember your Jeep was designed to have it's doors removed? Start there.
If no luck pull the dahsboard switch apart and reverse the wires front to back.
Unless you're over 36,000 miles it should still be covered under warranty.