Moparmike Posted December 6, 2017 Share Posted December 6, 2017 My low air buzzer stop working but the light still works is there a buzzer in the dash on a circuit board ..my freightliner has a replaceable hoping the Mack does too.. 2000 rd688 Quote Link to comment Share on other sites More sharing options...
alex g Posted December 6, 2017 Share Posted December 6, 2017 Should be a buzzer relay in fuse panel. Quote Link to comment Share on other sites More sharing options...
Mackpro Posted December 6, 2017 Share Posted December 6, 2017 On a RD with an ETECH. there is usually a multi-buzzer that does many functions and and is located by the driver side door post below the dash. Quote Link to comment Share on other sites More sharing options...
Moparmike Posted December 7, 2017 Author Share Posted December 7, 2017 Any pics of it..i see a switch on my firewall by the clutch with 3 wires going to it.. Quote Link to comment Share on other sites More sharing options...
Mackpro Posted December 7, 2017 Share Posted December 7, 2017 I'm thinking its not on firewall . it's a black box mounted on the back side of the metal support bar that runs from the dash to the door post where the door hinges as on the driver side. It also does the turn signal clicking and power divider buzzing when engaged and engine shutdown buzzer Quote Link to comment Share on other sites More sharing options...
Moparmike Posted January 8, 2018 Author Share Posted January 8, 2018 I found it thanks guy Quote Link to comment Share on other sites More sharing options...
SupraJay87 Posted August 13, 2020 Share Posted August 13, 2020 I installed a new buzzer for my 94 RD688s, it works for the signals and flashers but it doesn’t come on for low air pressure, I was put out of service for it. I need help 😭 Quote Link to comment Share on other sites More sharing options...
Mack Technician Posted August 13, 2020 Share Posted August 13, 2020 18 minutes ago, SupraJay87 said: I installed a new buzzer for my 94 RD688s, it works for the signals and flashers but it doesn’t come on for low air pressure, I was put out of service for it. I need help 😭 Is your low pressure light working? Most of the time it's from guys kicking the wires off the air PSI sensor manifold down by your feet and then later putting them back on the wrong sensors. Quote Link to comment Share on other sites More sharing options...
wilbur Posted August 16, 2020 Share Posted August 16, 2020 (edited) On 8/13/2020 at 1:59 PM, SupraJay87 said: I installed a new buzzer for my 94 RD688s, it works for the signals and flashers but it doesn’t come on for low air pressure, I was put out of service for it. I need help 😭 I was sure only one had to work, light or buzzer. But thats in Illinois, the corrupt state. Edited August 16, 2020 by wilbur Quote Link to comment Share on other sites More sharing options...
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