Yeah. Its mind boggling how many wires are in that dash. That manifold seems deep down in there because of the rats nest of yellow wires. On my ‘99 I’ve replaced the low air buzzer switch three times over 25 years. Two of them started leaking air at the metal crimp were it connects to the plastic top. Made the first one easy to find.
Low air warning pressure switch
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by B5love08, Mar 4, 2024.
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Might be worth putting 12v straight t your buzzer/light to make sure they do work and its not a fuse somewhereRideandrepair Thanks this. -
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The brake light switch may be on the peddle like an old GM car. It is electric only. Both of ours were. You can here it click on and off with key on and engine off. Press peddle with hand and it should be hearable.
My ‘99 had a recall on it because the clip that held it against the peddle wasn’t strong enough and would cause it to push back and not work lights. Thats when I became a where of that nonsense of a switch on an air brake truck. There are a few things on the Business Class trucks that are not traditional Frieghtliner ways. That series was Mercedes designed and influenced.B5love08 and Rideandrepair Thank this. -
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I pulled apart dash and this is what I found near the green air line I’m hoping this is it?
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