I can't get the cruise to working going down the road. I can idle the truck when the parking bakes are set. I have Jake's they cut out when the clutch is in gaged so I'm guessing it's not the clutch switch. I don't have a switch on my brake pedal. My speedo and tach also work. So I thought I would try the air switch, but I do not know which air switch is for the cruise control. I've found the air manifold behind the steer column just don't know which to change.
1999 fld 120 cruise control not working?
Discussion in 'Freightliner Forum' started by 1985mudflap, Oct 5, 2021.
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What motor?
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12.7 60 series detroit
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Could be plug into ecm. The big one facing the fire wall, remove, clean and make sure it is in tight.
1985mudflap Thanks this. -
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Air switch?
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I had same problem, till I found a second speed sensor on trans tail shaft. One on top, controls cruise. Bottom one controls speedo. Changed top one. Fixed. I don’t know if any air switches for cruise. One low air switch, and one brake light switch, usually plumbed in near parking brake, on FLD. Some Centuries and ? have them near steering column on right side.
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Rideandrepair Thanks this.
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