MOTOR HOME REPAIR

Here are some additional thoughts that may help. I sold my HR Endeavor, so I do not have a motorhome to look at so this is all from flawed memory.

Since your motorhome will crank & run..you may just have a power issue with power to the VDU (VDC). I think that if the engine computer and transmission computer are getting power, the vehicle may power up and run without having power to the VDU (VDC).

In the electric bay (front bay drivers side) you will find two black boxes supplied by Freightliner. Inside these boxes you will find an assortment of fuses and relays. I think the fuse/relay diagram is printed inside each fuse box cover. Look there for anything that may send power to the VDU. Make sure all fuses are good. Also be sure that the inside of these fuse boxes do not contain water. This compartment is prone to leaks from the roof and sidewall of the rv. Water in a relay can cause all manner of problems (been there done that)

It is also possible that there is a relay in one of these two boxes that controls power to the VDU. All of the relays are the same part number, so if you suspect a bad relay, you can swap relays between positions to see if your symptoms change.

If you do not find a bad fuse or relay, then I would either begin doing the diagnostics in the SB 54-12 bulletin referenced above, or call the Freightliner help desk for further guidance.

Keep us posted on your results.

Fred

al hillman wrote:
Thanks for all the suggestions. I have seen signs of rodents so I believe there is a wiring harness problem. I have a freightliner chassis. How hard is it to replace the wiring harness?Do you have to pull the entire dash out? The engine cranks and headlights and signal lights work but no guages work-not even the air guages.

Al

You are making progress. PLEASE DO NOT PULL THE WIRING OUT OF THE DASH. Your instruments are fed from the common data bus from the VDU...this link goes to the dash cluster that interprets the data...and then feeds to instruments via a spider harness. You can actually pull all the wires from the instruments and reinstall them in a different order and they will still work WHEN THE SYSTEM IS WORKING CORRECTLY as each instruments only sees the data it needs from the harness. In other words, all data for the instruments goes to each instrument.

Please reference the Freightliner document I referenced in an earlier post on this thread. It has the troubleshooting steps to get your instruments working. I do not believe your problem is in the dash wiring.

Another great resource is the Freightliner help desk.
CUSTOMER SUPPORT CENTER
1-800-FTL-HELP (1-800-385-4357)

This is a free service and they will help you or your mobile technician with the troubleshooting. When you call them, have the last 6 digits of your Freightliner Chassis VIN number available as they use this to look up your chassis info.

I hope this info helps.

Fred

A couple friends of mine had rodent damage on their RV's and their insurance covered the repairs.

You may want to check with your insurance company.

Thanks for all the suggestions. I have seen signs of rodents so I believe there is a wiring harness problem. I have a freightliner chassis. How hard is it to replace the wiring harness?Do you have to pull the entire dash out? The engine cranks and headlights and signal lights work but no guages work-not even the air guages.

Al

ScottG wrote:
Why are you yelling? All caps is considered very bad form (notice no one else is doing the same).

Good luck with your issue

But...his name etc are all in lower case. :B.....Dennis

al hillman wrote:
ANY RECOMMENDATIONS FOR FLOOR-ROOOF-GENERATOR-DASH GUAGES NOT WORKING IN ARKANSAS FOR A 2000 HOLIDAY RAMBLER 38FT DIESEL ENDEAVOR SERIES. I HAVE HAD IT SET UP FOR A COUPLE OF YEARS AND NOW ALL THESE PROBLEMS HAVE OCCURRED.THANKS FOR ANY SUGGESTIONS ON WHERE TO GET THESE ITEMS REPAIRED.

AL

Sounds like it may just be dead ( probably bad ) batteries .

Take pictures of the batteries / cables before taking any
thing apart .

I suspect your HR Endeavor is on the Freightliner chassis. If yes, the dash instruments work via the vehicle data computer. (sometimes referenced as VDU)

If you get the basic electric issues resolved and the dash instruments still do not work, be sure your technician has access to the freightliner document for troubleshooting the dash instruments. It can be found in the link below.

Freightliner SYS III wiring pdf

Good luck with your repairs.

Fred

When you say "set up" do you mean in one location? If so I would suspect you may have developed a rodent problem. No sure when it started but insulation on wiring is made from soy beans and critters find it tasty.

Al isn’t that old.

have you had crittes mice etc in the rv ? they,ll ruin a wiring harrness.