Exhaust brake fuse blows

[Tradewind98]

I have a 1998 National Tradewinds on a Freightliner chassis Cat 3126B. My exhaust brake quit and I discovered a blown 5A inline fuse. I replaced the fuse and everything was good. But going down a hill, I had the exhaust brake on and it was working fine. But I needed to use my air brakes to slow me down more. When I applied the brakes, the fuse blew again.
I replaced the fuse. I can use the Exhaust brake, and if I switch it off, I can use the air brakes and the fuse won't blow.
Any ideas?
Thanks

[Skip426]

I see you've been a member for a while but not posting.
A few questions.
Is this a new problem ? Or a problem on a coach that is new to you ?
Are you towing a trailer or toad ?
I have wiring diagrams for my 99 F/L chassis and don't show an in-line fuse, in the exhaust brake system. All in fuse boxes.
I'll double check , but without looking right now , I think all the fuses related to exhaust brake operation , are 10 amp, on my chassis anyway.
Because, the F/L chassis , activates the brake lights when the exhaust brake is active there may be a cross feed, some where.
Freightliner's free help line may be able to help. 1-800-385-4357, have your serial number handy. When your on the phone , inquire about Access Freightliner, for online access to wiring diagrams, and other info, specific to your coach, sign up takes a while but is worth the effort.