Start by checking the tow harness.
Which fuse is blowing?
When the brake lights don't work, the cruise control would not as well.
Did you check and test the brake fuse? At the brake switch, use t DVOM or test light to test the sires for power supply. At least one wire must be hot at all times.

Answered by KHLow2008 (expert)
40,318 answers provided

i guess it was the brake switch. All 3 bulbs were burnt out so when i replaced them everything came back. even the high beams don't blow the high beam fuse now. I guess the switch could have been fine but something blew all three brake lights at the same time b/c i had just checked them 2 days before. hopefully it's not something else, guess i'll find out soon. thanks for the info, cool website.

Response from jaysonfire
1 question asked

Have the charging system checked. any spike in the alternator charging can result in multiple bulbs blowing and if serious, it can bring other electrical components down.

Answered by KHLow2008 (expert)
40,318 answers provided