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Old 04-01-2009, 06:12 PM   #1
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Cluster problem

I have a 2004 Newmar Scottsdale on a Workhorse (WH) chassis.
For the last year I have been fighting an interminet problem with my intrument cluster. The cluster works fine except for the cluster backlights.
When I am driving the intrument cluster lights are blowing a 10A fuse as defined on the fuse cluster as "ILLLUM". I cannot get it to blow fuse unless I am driving. When it is sitting, I move wires, turn lights on and off with engine running and no fuse is blowing. A local WH certified dealer has had my motorhome in their shop for about a month working on this problem.
This fuse is used for the intrument cluster plus switch lights (ie: generator switch, headlight switch, and other accessorie switch lights). To help isolate the problem, the WH shop placed the intrument cluster on it's own fuse and the other lights on it's own fuse. I went for a 30 mile test drive and went back to the WH shop. The intrument cluster with it's isolated fuse blew. Therefore, the WH shop thinks that the instrument cluster is blowing the fuse. Because of the high cost of the cluster, I hesitate to just replace the cluster and not fix the problem. The local WH shop is discussing this problem with Workhorse to see if they think that iit is the cluster and will they pay for it since intrument clusters have had numerous recalls.

Has anyone else had this problem? Any ideas? Any possibility that it may not be the cluster but the only thing else left in the light circuit that is blowing the fuse is the intrument cluster, fuse and wiring to plug and fuse?

Thanks....................
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Old 04-01-2009, 06:42 PM   #2
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In the past on a couple of different vehicles with intermittent and various instrument panel problems I had to replace the instrument voltage regulator. It apparently had some voltage problems that made the whole instrument cluster squirrely.

Ken
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Old 04-09-2009, 06:43 AM   #3
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TXICEMAN - where is this regulator located?? I am starting to have intermittent and erratic problems with my IP, might be a good starting point
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Old 04-09-2009, 10:13 AM   #4
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Quote:
Originally Posted by j.smith View Post
I am starting to have intermittent and erratic problems with my IP, might be a good starting point
j.smith, May we have your year, make and model. That would be a good place to start. I am unaware of an (Actia) instrument voltage regulator on Workhorse Chassis.
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Old 04-09-2009, 09:02 PM   #5
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Driver,

it is a 2003 Pace Arrow 36B on a W-22 chassis. I had the IP replaced about 4 years ago due to the pixel fade problem. Lately I have been getting spurious alarms, warnings on the LCD, and alarms which last a few seconds then clear. Yesterday while backing the coach into it's garage the speedo was bouncing between 20 and 40 mph (I was backing up at the time). The only thing consistant seems to be related to the left turn signal, when I signal left or step on the brakes I get an alarm but no light on the IP. The alarm lasts maybe 5 - 10 seconds and then clears. A check of the ECM with the code scanner shows no codes stored or pending. Figure I will clean and tighten the grounds and see if it gets any better. The only other device which might be involved is my USG toad brake system which I will uninstall if necessary; then we will have to see where it leads from there...

I'm open to any suggestions you'all might have...
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Old 04-24-2009, 06:00 PM   #6
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I just my MH back from the dealer regarding the cluster backlight fuse blowing. They replaced the cluster and so far so good. I only drove it about 25 miles and no blown fuse. I am getting ready for a long trip, so I will see what happens. Thanks all for your help..........
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