1996 Plymouth Voyager Ignition

My Voyager just died on the highway; no check engine light, nothing. It will try and crank over but I am not getting any spark from the spark plug wires. A friend suggested the timing belt! I check all fuses and the fuel pump is less than two years old. It still doesn't give me a check engine light. In the last month I had a tune-up and oil change. It ran beautiful before this. Any ideas on what to check next?