What could cause the cruise control to stop working on a 2007 Tacoma?

Need to check the switch at the pedal. A real easy way to check it is if you have cruise control. Set the cruise and tap the brakes. If the cruise doesn't disengage then the switch is usually the culprit

Cruise Control Problem - Nissan Forum

www.nissanforums.com/b13-91.../135028-cruise-control-problem.html
Jun 21, 2007 - 4 posts - ‎3 authors 1994 Nissan Sentra 4Door XE with 5 Speed Manual, GA16DE, 230k Miles. ... Now theCruise control light in the middle of the dash will NOT light up and the cruise control will not engage no matter what button I push. .... Cruise Control NOT working.. sentravis, B14 95-99 chassis, 26, May 29th, 2009 12:24 ... speedometer not working?
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Depends if it is vacuum actuated or electronic. Vacuum actuated, check the hose that runs from the manifold to the controller, make sure there is vacuum, electronic: replace the control module on the actuator.

Make sure your brake lights work.
May be bad switch,the cruise control runs through the brake light switch by the brake pedal.

Don't mess with it, just buy a new switch.

no i dont think the heater and cruise control have anything to do with a vacuum i could be wrong though

The starting problem, Would have nothing to do with the cruise control or the seat heater, Have the charging system in it check out, It could be the battery, Alternator, Or evan the starter going on it,

Me too, 2007 with 33K miles. I read low brake fluid will cause the issue. I need to buy some.

The horn probably got water in it and this caused it to rust around the electro-magnet inside causing it to seize up. Replace the horn.

fuses???
Check relays.....
Harness grounds, engine ground,
Check the trailer harnes for short.
Vitally