brake light wiring for cycle analyst with mosfet as a switch

[Ebikecrasher]

I have been using automotive relays to trigger 12v accessories for a couple years. Headlight, car horn, and some led strips. Adding the brake light relay works great. Problem is now when the brake light relay is hooked up and I trigger one of the other relays the CA reboots. When I remove the automotive relay and drive the headlight directly the problem goes away but this is not an option for the horn because it pulls too much juice.