QKA-M35
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Has anyone been able to get standard brake light action versus the standard blackouts to work on their M52?
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M52 - Brake Lights Not Working
- Thread starter QKA-M35
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porkysplace
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Have you checked the switch on the airpac/master cylinder ?
QKA-M35
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No I haven't yet. Just so I'm clear that there is a way to send power to the rear brake light in lieu of the black out light correct? Please excuse my ingnorance but everything I'm reading is leading to that there only is a black out function on the brake lights??
porkysplace
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If your light switch is in the service position all the lights should work . In blackout there should be a faint tail light and brake light.
QKA-M35
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THANKS! I may have a bad light switch.
QKA-M35
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The switch under the truck is bad. I believe it is the airpac/master cylinder switch you referred to. Please see attached. Do you know where I may find a good one?
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Your truck has to have air pressure built up to make that switch function.
DG
DG
QKA-M35
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Yes...right...brakes work good...switch just isnt sending power to brake lights.
porkysplace
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Big Mikes motor Pool
AIR OPERATED BRAKE SWITCH FOR 5 TON AND CONVERTED 2.5 TONS - 11602160
AIR OPERATED BRAKE SWITCH FOR M939 SERIES 5 TON TRUCKS. THIS SWITCH CAN BE USED AS AN UPGRADE ON OLDER 5 TON AND 2.5 TON TRUCKS TO REPLACE THE FLUID SIDE BRAKE SWITCH. IT IS HOWEVER NOT A DIRECT REPLACEMENT AND WILL REQUIRE SOME MODIFICATION TO WORK. PART # 11602160 NSN 2540-00-789-6192...
www.bigmikesmotorpool.com
QKA-M35
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Got it!..THANK YOU!!Big Mikes motor Pool
AIR OPERATED BRAKE SWITCH FOR 5 TON AND CONVERTED 2.5 TONS - 11602160
AIR OPERATED BRAKE SWITCH FOR M939 SERIES 5 TON TRUCKS. THIS SWITCH CAN BE USED AS AN UPGRADE ON OLDER 5 TON AND 2.5 TON TRUCKS TO REPLACE THE FLUID SIDE BRAKE SWITCH. IT IS HOWEVER NOT A DIRECT REPLACEMENT AND WILL REQUIRE SOME MODIFICATION TO WORK. PART # 11602160 NSN 2540-00-789-6192...
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Any chance that you used a short piece of wire to "jumper" the switch - so you can see that the lights function - and that the switch does not?
QKA-M35
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Sure did! Lights function as should so isolating to switching mechanism.