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Old 07-09-2013, 10:57 AM   #1
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Cruise control/brake light issue

I've been fighting an intermittent issue with my cruise control for a while. Sometimes it would work, sometimes not. Subsequently I found that while stopped and parked with the ignition off the brake lights remained on when the cruise was inoperable.

I finally tracked the issue down to the brake light switch which is attached to the air pressure manifold which actuates the brakes and which also controls the cruise control (turns it off when the brake pedal is stepped on)

This is a seemingly common issue with the Freightliner chassis of this vintage. I found the replacement part is a Hobbs 76068-40. The part was $ 12 at the local Freightliner store

Just thought I'd share
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Old 07-10-2013, 01:59 PM   #2
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datrbone8;

Thanks for sharing this with us. This is valuable information for sure.

Don
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Old 12-12-2013, 08:13 PM   #3
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I have this same issue with my 95/Foretravel..

Anyone know where this manifold is.. I'm not having an issue with the brake lights.
Rather than replace them all, I'd rather pinpoint which HOBBS is the problem.
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Old 12-12-2013, 08:54 PM   #4
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It's right behind the wall that the brake pedal is mounted in front of. I got to mine by going under the body in front of the driver's side wheel. Make sure you double check the part number of the switch. They're not all the same
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Old 12-13-2013, 06:40 AM   #5
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Thanks for the info, will put it on file, it will save a lot of troubleshooting time when/if it happens to mine....
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Old 12-13-2013, 07:40 AM   #6
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In fact when the cruise quits. The very first thing you shoudl check is your brake lights.
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