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Old 11-19-2012, 05:30 AM   #1
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Unhappy cluster panel on motorhome dash

Why do all the lights go out on the dash of my Tiffin Allegro Bus? They will come back on after jiggling switches a few times. The motorhome run fine, but all the gauges disappear. Thanks. sneil

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Old 11-19-2012, 05:44 AM   #2
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Possibly a loose plug on the back of the switch or simply a bad switch.

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Old 11-19-2012, 05:47 AM   #3
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Originally Posted by rgreen45 View Post
Possibly a loose plug on the back of the switch or simply a bad switch.
+1 here.

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Old 11-19-2012, 06:56 AM   #4
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If you are talking about the backlighting of the dash gauges, it could be that the dimmer switch contacts are dirty or pitted causing the lights to go out and jiggling it brings them back.
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Old 11-19-2012, 07:00 AM   #5
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Could be a bad ground somewhere on the dashboard. I had an older Tradewinds DP that did this. My mechanic tried to fix it and it would seem to always fail again. Eventually, he noticed that simply pushing on the dash in the middle would fix it so all he did was add an extra screw right in the middle at the top and it was fine after that.
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Old 01-10-2013, 12:27 PM   #6
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No speedometer, tachometer,odometer,etc

I just posted a reply on another site before I saw this. I have a 2003 Allegro Bay on Workhorse. The normal sequence when the ignition is turned on is to get a series of bells before the dash instruments as stated above in the title are functional. Now I do not get any of this until after I turn the headlight switch on. The headlight switch does not have to stay on. The turn signal indicators also do not display until this process is completed although the turn signals work fine externally. Is there a relay that may be involved with this?
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Old 01-10-2013, 12:40 PM   #7
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The chassis make and year would probably get you better answers.

That being said, many FL chassis have had the problem that you describe (including my old 2003). Usually the problem can be traced to a relay on the PS frame rail. There are 3 of them back there. One controls the power to the cluster, one is the starter solonoid, and I can't remember what the other one is for.
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Old 01-10-2013, 12:42 PM   #8
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We had the same problem in our 93 Monaco. Turns out it was a purple wire in the bay area near the inv/char and all the other electrical stuff. It kept not connecting and connecting. My blog in my sig has the pics of where it is and what it looks like. It's the pics under Jan 15 of 2012. Probably not your answer but then again you never know.
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Old 01-10-2013, 01:22 PM   #9
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Welcome to irv2.
If you have a Workhorse chassis under your Brave you may need a new display.
If it is a workhorse there is a bolt on frame cross member that has white ground wires, they may need to be removed and cleaned and coated with di-electric grease than tighten the nut. Ground wires feed jack system if you have one and grounds on fuse panels under dash.
Also you can remove plugs rear of display clean with contact spray and reseat on back of display.
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Old 01-14-2013, 07:05 AM   #10
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Mine did that I had to replace the head light switch in Canada $160.00 do it your self .

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