Peugeot 106, 1.0 33 kw, year 06.96 No more jumps…………

Hello together, yesterday I was with the 106 ́er to the TÜV. TÜV passed and off home. Car parked and two hours later I wanted to bring it back to its owner. The starter turned but the engine did not jump on !!!!!!!!!!!!!!! The ADAC called and looked and looked with the result that the multifunctional relay would possibly be defective, okay…….. This morning to the scrap yard steamed and a new used worried, installed and started !!! Nix was, the 106 ́er did not jump on …………. He has no sparks, petrol punch starts with ignition. There can be no such thing, or yet ;-)……… Ask for good tips……… Thank you !