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Old 05-28-2020, 10:42 PM   #1
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1997 Holiday Rambler Endeavor DP Cruise Module Location?

Evening all,

I have been trying to diagnose my no cruise problem on my coach.
Sometime before we purchased it the main wire loom from the front to back dropped down and was being rubbed by the drive shaft. To the point where it began shorting out the tail and brake lights plus others. The wires were repaired and the harness re-hung but the cruise does not engage. I have been looking for a fuse FOREVER!! There is not a fuse marked "cruise" in either the chassis or the body boxes. I was looking at an old wiring diagram that shows a fuse in line somewhere near the cruise module but so far I have not been able to locate said module. I have looked all around the engine area and see nothing. I spoke to Freightliner and they told me that as far as the chassis build goes they run the wiring from the switch on the turn signal arm but Holiday Rambler connects it to whatever cruise system they install.
I will be calling Monaco in Oregon tomorrow morning, just thinking perhaps someone has an idea before I spend four hours on hold waiting for them.
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Old 05-29-2020, 02:36 AM   #2
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My Endeavor is a 2000 with a Caterpillar engine, so not exactly the same as yours. The cruise function is built into the Caterpillar ECU. Monaco/Holiday Rambler supplies the cruise control switch on a steering column stalk. My switch/stalk is made by Rostra, a long-time supplier of aftermarket cruise components. The wiring runs from the stalk to a black plastic signal conversion box under the dash, and then through the wiring bundle to the ECU. I may be over-simplifying this, but not by much.

When mine wasnít working, I started tracing wires at the control stalk and immediately discovered that a flat, multi-wire connector under the dash was disconnected. It was buried behind the CB radio and electric towing brake controller. I re-connected the circuit, and my cruise has worked perfectly since then. I have not seen a fuse, and I have not tried to trace the wire path on the printed wiring diagrams that came with the RV. I donít have the 1997 wire diagrams, but I do have a digital copy of the 2000 version that I am happy to share. I doubt that there are many differences, if any.

If a simple examination of the components doesnít provide an immediate fix, as I was fortunate to find, I would begin diagnosis by wire substitution. Get some wire, and build a temporary replacement harness that bypasses all of the potential problems. Test the functionality of the switch and the signal conversion box. If you can get it working , then you can make a more permanent repair.
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Old 05-30-2020, 08:52 AM   #3
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Quote:
Originally Posted by slowmachine View Post
My Endeavor is a 2000 with a Caterpillar engine, so not exactly the same as yours. The cruise function is built into the Caterpillar ECU. Monaco/Holiday Rambler supplies the cruise control switch on a steering column stalk. My switch/stalk is made by Rostra, a long-time supplier of aftermarket cruise components. The wiring runs from the stalk to a black plastic signal conversion box under the dash, and then through the wiring bundle to the ECU. I may be over-simplifying this, but not by much.

When mine wasnít working, I started tracing wires at the control stalk and immediately discovered that a flat, multi-wire connector under the dash was disconnected. It was buried behind the CB radio and electric towing brake controller. I re-connected the circuit, and my cruise has worked perfectly since then. I have not seen a fuse, and I have not tried to trace the wire path on the printed wiring diagrams that came with the RV. I donít have the 1997 wire diagrams, but I do have a digital copy of the 2000 version that I am happy to share. I doubt that there are many differences, if any.

If a simple examination of the components doesnít provide an immediate fix, as I was fortunate to find, I would begin diagnosis by wire substitution. Get some wire, and build a temporary replacement harness that bypasses all of the potential problems. Test the functionality of the switch and the signal conversion box. If you can get it working , then you can make a more permanent repair.
Thanks Mike!

It started raining here so I will get back on it when it dries out.
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Old 05-30-2020, 09:22 PM   #4
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A thought... Any brake actuation will kick the Cruise out, might recheck the brake wiring repair.
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