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the ground wire is connected to the floor of the cab directly under the handle , you need to crawl under to trace it back.

I don't know of any tie into the temp sensor in the engine and the low air pressure system , Let me think on it for a couple of days , BUT , have you looked at the micro switch in the actual emergency brake handle, Its under the three way air switch and inside the mechanism of the brake handle ...

Air dryer is about the lowest point in system. I opened all the tank drains and pressure fed a little air system lube from Napa into my tanks. Just a misted spray with an air chuck chuck my truck had low miles lots of at ease time and no one rvet drained the tanks. Don't remember the name of...

Yes they are all the same I think Swamp has the most experience with them and has the scoop on silencing the dam buzzer Check the internet. Look hard prices vary Widely. From $42 to 300 per switch

I quite agree. Read them all the time. Never really paid attention to the A1section. But thought configuration of brakes was the same except for ABS mod. Curious now will have to look when I get time. About 2057

So does the A1 only have two or is it the same as the A2 , three. primary secondary and spring brake

hey 74 no Biggie , was looking in deuce side then spotted a problem, Ill help out I thought , gave half a Tech manual of info , next day realized it was in the hum vee forum, used to break a lot of em, didnt fix many , SoThanks for jumping in with us, its all valuable info and it all comes out...

Good call 98 sounds like a sensor or a chafed wire short. BUT post the results please !

if the system is the same, I think it is, there are 3 pressure switches, primary secondary tanks on right hand passenger side , easy to identify two wires in, and one the right hand side of the spring brake valve handle behind the dash panel , can be changed easy with out pulling dash, just...

Your lucky if you could still have 60 psi overnight. !!! I've beenleak chasing for months. Never would keep any pressure overnight. One more air in the stack valve to go e

74 is correct. The spring brake ivertide itself won't sound the alarm. But carefully observe your warning light for parking brake has it got a slight glow or does it light. My parking brake and buzzer problems. Have usually started with a slight illumination of the warning light then the buzzer...

Temperature has nothing to do with the buzzer, they run cool and the only time the fan will engage is when the temp gets up to the 200 to 210 range , it is controlled by the shutterstat, which is mounted on the top of the engine in a boss on the rad hard line. they are not cheap run 195 to 300 $...

Go to the Tech Data section on here and download the 5 ton Tech Manuals, its free and they are worth their weight in gold, The buzzer is a PITA , is wired into the brake handle in the form of a micro switch way down in side the handle and then its daisey chained to the tank low pressure...