Recurring ignition switch problem

[John From Detroit]

Brake lights do not go through the ignition switch.. But I did have the brake light switch fail on my Class A.

 

[TheBar]

Sometimes the brake light switch gets out of adjustment. Most are plastic screws and nuts that can crack and not depress the plunger. I couldn't figure out how my ex kept having the switch break on her car. Instead of letting off the pedal she would swing her foot off the pedal over to the gas. That allowed the pedal to pop up violently and hit the switch. I've even seen a pedal spring get weak over time so it doesn't turn the switch off.

 

[udidwht]

I would also go ahead and start removing and cleaning all the positive and negative cables at the batteries. I'd also track down the ground chassis cable/s you have and remove and clean their ends as well. Check all the grounds you have at each corner of the coach for headlight/s, brake/running lights etc...