Yes, you are overloading the stock relays and wires. The headlight switch itself is also prone to failure.
Buy or build and upgraded headlight wire harness. The PutCo H4/9003 wire harness is a decent low cost wire harness. Other companies make better quality wire harnesses that cost a bit more.
Progressive Liberalism: Bringing you new ideas so wonderful, they have to include mandatory participation ......
Originally Posted by Ronald W. Reagan: Government is not the solution to our problem; Government is the problem.