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10-20-2021, 09:30 AM
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#1
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Junior Member
Join Date: Oct 2021
Location: Sparks, NV
Posts: 6
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Brake and Blinker problem
I just bought a 2006 Tiffin Phaeton and have a couple of issues. First of all the left blinker doesn't work. It does not blink but the right side works fine. All the bulbs are good. Secondly...every time I step on the brake the left blinker also lights up solid. It also comes on with the Exhaust brake. The 4-ways don't work either they come on steady, no flash. The other issue I am having is with the running lights. When I turn on the headlights everything comes on normally but when I turn off the headlights the running lights stay on. I have to go outside and open the battery disconnect to the coach to get them to turn off. Once I close that disconnect again they stay off until the next time. I think there is a control module somewhere that ties all of these circuits together. I just don't know where it is. The chassis is a 2005 Freightliner. Any idea out there? Thx Jerry
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10-20-2021, 06:49 PM
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#2
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,269
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Welcome to iRV2.
Sorry your first post is about problems .
This appears to be a ground issue for the signal brake ( or a crossed filament in a bulb ) I'd be thinking the grounds in the left rear light sockets would be the place to start . Bad ground and cross fed will overload the flashers and stop them .
Marker lights I'm thinking a sticky relay .
Your exhaust brake activates the brake lights , when active , that's where the exhaust brake factors in.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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10-20-2021, 07:05 PM
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#3
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Junior Member
Join Date: Oct 2021
Location: Sparks, NV
Posts: 6
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Brake and Blinker problem
Skip,
Thanks for the info and thoughts about my first post here. I figured I could get some sound advise from someone and I did. The guy bought this coach from replaced both the front headlights with new ones. Maybe he crossed up something there but everything else works. I know bad grounds can be a problem too. Is there a module that has all the blinker and lights going through it on this coach? Thx.
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10-20-2021, 07:25 PM
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#4
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,269
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Your coach is new enough that Freightliner's free help line should still be giving out wiring diagram and schematic pdfs.
So give them a call with your chassis serial number .
Does your coach have a smart wheel ?
Switches for cruise and wipers, on the arms of the steering wheel ?
1-800-385-4357 1-800-FTL-HELP
The newest schematics I have are for a 2002 chassis and they are slightly different than my 99 so best to have schematics linked to your serial number .
Wiring changes, happen about as often as some people change their socks .
Both the 2002 and my 99 schematics show a marker light relay .
In a PDM ( Power Distribution Module)like these .
How custom are Freightliner Custom Chassis ? The numbers on the boxes in the first picture are the last of my serial number .Yellow circle , signal and hazard flashers.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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10-20-2021, 10:50 PM
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#5
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Junior Member
Join Date: Oct 2021
Location: Sparks, NV
Posts: 6
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No mine does not have the smart wheel. I have called them but never got the schematics for my coach. I'll try again. Thx for the response.
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10-21-2021, 10:05 AM
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#6
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,269
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A second thought ; I always have them .
Late last night , I got to thinking about the brake lights illuminating the left signal indicator , and how a bad ground at the rear lights could cross feed brake light power ,to get to that lamp; and kept getting stumped .
Then I started considering other possibilities and , internal issues in the signal light switch came to mind .
I'm currently trying to figure out a test that would eliminate the signal switch as the problem , and will post when I have something .
One question , when the brake pedal is pushed and the left signal dash indicator is on , is the left front signal light also lit up ?
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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10-21-2021, 10:35 PM
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#7
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Junior Member
Join Date: Oct 2021
Location: Sparks, NV
Posts: 6
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Yes both front and rear are are on. Also the blinker light is a separate bulb from the brake.
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10-22-2021, 10:19 AM
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#8
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,269
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Quote:
Originally Posted by Jedoots
Yes both front and rear are are on. Also the blinker light is a separate bulb from the brake.
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Separate signal light on the rear of the coach , from the brake light .
Way different than my 99 that uses a common bulb AND opens up another possibility .
You probably have a trailer wiring adaptor , to take signals from the coach signals and brake lights and change to a common bulb set up on the trailer .
That adaptor module will have to be located , and disconnected to eliminate it as a possible cause of the power back feed.
Issues inside the trailer wiring connector can't be overlooked either .
But the turn indicator coming on is still giving me second thoughts.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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