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Old 05-27-2016, 09:26 AM   #1
WDW
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No brake lights

We were doing a walk around test checking lights before departure today, and found that we have no brake lights. However when we turn the headlights on our brake lights light up even without the pedal being depressed.

We've checked the fuses and don't see any issue there what's interesting is it in the Ford manual fuse 19 is labeled as a 10 amp in the book but as of 5 AM in the actual panel under the dash. However that fuse test OK.

Any ideas?


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Old 05-27-2016, 09:35 AM   #2
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Do you have the same problems with the toad wiring disconnected ?

1/2 of the problem , brake lights on with headlights , sounds like a bad ground in the rear lighting wiring of the coach.
But in that case the brake lights , should cross fed into the headlights , have you looked at the front lighting ; while someone holds the brake pedal ?
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Old 05-27-2016, 09:47 AM   #3
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Correction we do not have stoplights with the headlights turned on that information was inaccurate. But we do have is our taillights are lighting up. We are doing all this with the toad unhooked. I'm back to thinking that it's a relay switch or a fuse for the stop lights. However the fuse in the Ford manual says that it's position 19 calls for a 10 amp fuse. However in the fuse box position 19 is a five amp fuse and it's OK anyone have a wiring diagram for Morada fuse box thats better than the Ford book?


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Old 05-27-2016, 09:56 AM   #4
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The brake light fuse would only be covered in the Ford book that covers the chassis wiring , and fuse box . If the Mirada book had anything , it would be a reprint of info provided by Ford.

If the fuse size doesn't line up with the book description , the first think to do is check all the fuses in that box , could be the location is wrong too.
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Old 05-27-2016, 10:11 AM   #5
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It sounds like you have no power to the brake light circuit.

There is likely a switch for the brake lights on the brake peddle. Have you checked it to make sure the wires are attached and the switch functions correctly?
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Old 05-27-2016, 12:40 PM   #6
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do you have a test light start at the brake light switch and see if you have power
work your way to rear Did you ck bulbs odd they would both go at once but its possible. Most likely is a bad ground both rear brake lights may share one
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Old 05-27-2016, 06:33 PM   #7
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Well after a frustrating day and canceling our trip we are still out of service.

Local body shop replaced brake peddle switch. Nope

Traced power. Nope.

Coachnet tech never called back.

Good Sam tech still thinks it's a broken wire, fuse .... But couldn't locate s mobile tech in our area to help.

Coachmen sent via email revised build fuse diagram - but it doesn't match what's installed under the dash (all fuses test ok).

Our MH dealer says "it's a Ford issue"

The Ford truck / motorhome shop in Buffalo was welcoming for Tuesday if we drop it off over the weekend. (65 mile trip).

Ford Motorhome Hotline opened a file but wasn't sure if the finger pointing game of "it's a Forest River / Coachmen" problem" or "it's a Ford problem". And who pays.

Meanwhile, the bank gets a payment, we lose a weekend, The Campground gets to rent our spot and get paid twice because we forfeited our reservation and my thumb is tired from composing this posting. Thinking about loosing my sense of humor ....


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Old 05-27-2016, 07:02 PM   #8
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Could it be this fuse? I don't know where it is located.
Fuse holder module

Locate the fuse holder next to the diode and relay module.
Fuse Ampere rating [A] Protected components 1 10 Hydromax – brake on/off signal
The only other fuse I see is the one you found (#19). It is listed as a 10 AMP fuse in the diagram I looked at.
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Old 05-27-2016, 08:14 PM   #9
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Thank you! Very confusing because even diagram sent from plant does not match actual build. I'm thinking it's a relay too -but where??

We even checked the PDU. All fuses checked ok.


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Taking in the sight wherever our Trolley takes us...
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Old 05-28-2016, 12:33 AM   #10
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Have you found the brake light switch? Is the plug installed? Is the switch plunger stuck?
If you find the brake light switch, try a jumper across the plug....Do the brake lights work?
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Old 05-28-2016, 04:09 AM   #11
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We replaced the brake light switch all together. No luck.


2016 Coachmen Mirada 35 BH
2015 Jeep Roadmaster AT. tow bar with RVI2 supplemental.

Taking in the sight wherever our Trolley takes us...
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Taking in the sights with our Trolley ...but life is always better under a Palm Tree
2016 Coachmen Mirada 35 BH. - our Trolley
2016 Jeep Cherokee Latitude, Western New York
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Old 05-28-2016, 06:04 AM   #12
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Ever thought of this ?
Signaling While Driving - Use hand signals when the sun is shining brightly or when a line of cars following you
LOL, we would never give up on a trip, unless a mayor problem.
Shop did this "Local body shop replaced brake peddle switch. Nope", whatever happen to using a voltmeter. Did the shop even measure to see if voltage is on the brake light wire at the BACK?
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Old 05-28-2016, 08:47 AM   #13
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No voltage in back. It's a matter of tracing for a ????

Is it possible one of the LED lights on the circuit is bad and that would cause the whole brake light circuit to fail?


2016 Coachmen Mirada 35 BH
2015 Jeep Roadmaster AT. tow bar with RVI2 supplemental.

Taking in the sight wherever our Trolley takes us...
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Taking in the sights with our Trolley ...but life is always better under a Palm Tree
2016 Coachmen Mirada 35 BH. - our Trolley
2016 Jeep Cherokee Latitude, Western New York
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