Brake pulse, front or rear rotors?

[Hoovail]

Just picked up a 2000 F250 7.3 L with 192,000 miles. I have very noticeable brake pulsing when braking. Especially when applying them when exiting the interstate. I suspect the rotors are warped. I'm on a budget and don't want to spend any unnecessary money trying to diagnose the issue. My steering wheel doesn't shake at all. Does this mean I should start with the rear rotors?

[LEMKE]

Worn ball joints will give the same symptom... it could also be worn bearings. Check it out before you start throwing parts at it.

[Hoovail]

Thank you, I've checked the front end by jacking the truck, and wiggling the front tires. No play at all. Is there something else I should check for? Do I need to pull the bearing in order to check it?

[ReefBlue]

Jack up the front end and spin the wheels. If the rotor has a high spot, you'll hear it drag as it rotates through the brake caliper.

[Hoovail]

Resurfaced the the front rotors today! 80% better, not completely gone though. I'm pretty sure the rears need it as well. When the bank account refills from the strain of my new truck, I'll replace all pads and rear rotors. thanks for the replies!!