MY PLAYER WON'T COME ON IF I HIT A BUMP IT COMES ON FOR A SECOND. THE WIRING IS STILL INTACT

Might want to check your wiring at both ends

U073 is a communication code from one module to another to simply put it. Code U073 refers to a communication problem with the electronic brake control module ( Which controls ABS/Traction and stability ). I would suspect a loose connection/shorted wiring or even possible internal problem with the brake control module.If the issue occurs after hitting a bump, most likely a loose connection or the wiring rubbing somewhere causing a short from the brake control module.

switch timer bad.or shorting wire i.e not makin proper contact. how old before investing money .new check value.

CD skip when hitting a bump is common in factory or low end players also if your player is not secured properly the disc will move slightly and the laser loses it's place, so to speak, for a second. The radio thing could be a loose antenna wire connection, possibly related to the fore mentioned problem. Hope that was helpful.

If you mean the blower motor is not working at times, it can be the motor, a resistor, or the switch on the dash. Could also be a bad connection in the wiring harness.
When the blower won't work, a mechanic would check for power and ground at the motor.

doubt if tire size will be the problem
more like bad wheel sensors and wiring
the traction control use the same sensors as the ABS

if u hit a bump and it goes out check the connections and wiring at battery and alternator for loose,damaged or corrosion

you have a loose connection in you wiring or a bad ground you will neesd the wiring diagram to figure out where the problem is but i recommend looking for a common ground to both systems

Does it cut out when you are listening to the tuner as well as the cd player? If so, you have a bad connection somewhere. Sometimes the solder joints inside the radio can be cracked and will cut out when you hit bumps. May be a wire that is a little loose. Check all the wiring.
If it only cuts out when you are listening to the CD player, you may need the lens cleaned or the laser replaced. Sometimes the cd player cuts out because the unit has too much wiggle room and it bounces a little when you hit a bump causing the cd to skip or cut out. and there is always the dirty CD. Try cleaning the CD's with windex and a soft cloth like a bath towel. It works great for me and is cheap. Fingerprints can and will cause a cd player to skip.

Had the same problem twice already.

Took it in for service and they charged me 125.00 (USD) to replace the ribbon cable on the inside.

I saved the $$$ and did it myself the second time.

The cable is located here on the Pioneer Website. It comes with instructions and no special tools are needed.

http://parts.pioneerelectronics.com/part.asp?productNum=GXY1005




Best of Luck.