95 peterbilt 379 with a 5ek 3406. Have no high idle, cruise, or Jake's and according to the scanner, all switches are working, ecm shows accel mode when the high idle is held..... kinda at a loss.... pinned the wiring at the ecm and everything appears fine. Is it possible for someone to have locked cruise and Jakes out in the ecm itself?
Peterbilt 379 3406e 5ek no cruise or jakes
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Thegeneral09, Jan 21, 2020.
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If not that it could be the brake switch.Last edited: Jan 22, 2020
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Clutch switch is good....brake switches are good... and ecm shows them working properly
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Ring since you said high idle and cruise not working as well, I don’t suspect at all any of the companants on the motor side. Engine harness does not control the cruise and high idle and Jake switch. You will want to check the truck main harness
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How do you know the clutch safety switch is good? It controls cruise/jakes switch. Did you test the switch itself? I just put the two wires together, bypassing the switch. See if cruise/Jakes work. Same with brake switch.
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Have they ever worked for you?
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