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Old 04-28-2019, 07:13 AM   #1
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Dash lights, running lights and brake lights are intermittent!

On my 2003 Signature does anyone know why when turning on the lights after 5-15 minutes the dash lights, running lights and tail lights go out? After a long time they will come on again and sooner if the coach is shut down. They simply are intermittent and unreliable. My first thought is there is some relay heating up and turning them off but why not the headlights too? Has anybody had this happen????
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Old 04-28-2019, 10:05 AM   #2
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Good morning Flyr4u; I would start with the electrical compartment under the drivers seat outside. If you have the owners manual, in the chassis section should give locations for dash lights and etc. The components you have listed could be on a automatic resetting circuit breaker. These breakers could be getting hot and disconnection the circuit and reconnecting when cooling off. Reason why could be a number of things. I notice on my Windsor in that outside compartment that corrosion can form on certain electrical connections. Might need new breakers as old ones have given up the ghost or you have lost a good ground somewhere in the system and that is causing resistance in the circuit and heating up the resettable breakers. These are just my thoughts and hope it gives you a place to start. Good luck!
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Old 04-29-2019, 10:30 PM   #3
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In the front run by are two large solenoids. The power for most of the chassis electronics pass through one or the other on the way to the banks of fuses that protect the individual circuits. It sounds like one of those solenoids is beginning to fail.
If I'm right, you should find that the items that are not working are fused on one bank which is controlled by one solenoid.
My solenoids are White Rogers 70-111224-5. Any auto parts store has them. Walmart.com cost is about $20-ish with free shipping IIRC.
BTW, the same solenoid is used in the rear run box, left side, to fire the starter solenoid. I keep a spare since I've replaced all three.

HTH,
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Old 05-01-2019, 05:55 AM   #4
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I had a similar problem on my 01 Executive and discovered the connections where the brake lights/tail lights were wired together in the rear of coach had developed corrosion. I ultimately removed the tape wrapping and plastic protective cover from the wires and wiggled each connection to determined which wire was causing the problem. I re-spliced each connection with heat shrink wrap connectors to prevent moisture in the future. It was causing my dash lights, running lights, brake lights, turn signals, tail lights etc. to intermittently work. I would also suggest checking all rear bulbs for good connection and possible corrosion. This too can cause similar problems.
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Old 05-01-2019, 03:51 PM   #5
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I will share a bit of info that might help someone in the future.

1999 Monaco Signature: Doing a pre-trip for the weekend and no tail lamps and lower markers on the back half. Front park and markers, and upper rear markers are ON.

After almost a full day of tracing wires and checking circuits, I discovered my problem.

The J3 connector, located in the dash, forward of the steering wheel, circuit and pin #7, has at some time run hot and melted a bit of the bakealite. I cleaned the pin and socket up and problem is solved. If any trouble in the future, I will just bypass the J3 connector.
Make sure you J3 connector is seated completely.

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Old 05-02-2019, 08:47 AM   #6
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Correction

On the above post, the Marker Lites is pin #4, not pin #7.


"The J3 connector, located in the dash, forward of the steering wheel, circuit and pin #7, has at some time run hot and melted a bit of the bakealite. I cleaned the pin and socket up and problem is solved. If any trouble in the future, I will just bypass the J3 connector.
Make sure you J3 connector is seated completely."


Dave
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Old 05-02-2019, 10:51 AM   #7
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I would start simple first. Try wiggling your headlight switch in/out. They are notorious for going bad.
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Old 05-27-2019, 06:25 AM   #8
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Solution

Problem solved.
I went into the electronics bay outside below the drivers window and started moving wires around with the lights turned on and currently not working. As I moved the large wire cluster zip tied together it temporarily turned them back on. Further movement and tracing found a bad ground connection to the ground bar coming from the lights relay. Once the wire was cut, re-stripped and correctly attached to ground bar there were no longer any problems. Thanks for everyones input.
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Old 05-27-2019, 06:32 AM   #9
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Good Job! Thanks for posting the solution.
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