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Old 04-02-2019, 06:34 PM   #1
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Brand: Thor Motor Coach
State: South Carolina
Posts: 3
THOR #10409
Ace 29.3 Brake light problem

I'm not sure if anyone has had this problem but I am quickly running out of options other than going through a "Lemon lawsuit" with Thor or Camping World. We purchased our 2018 Thor Ace 29.3 in January 2018. It has less than 5K miles on it. In November, while on a trip, I lost brake lights and blinkers. Both a mobile tech and Camping World attempted to fix it by replacing the blown fuses. Every time I would turn on the blinkers it would blow the fuses, before I could even get out of the parking lot. Camping World then said it was a Ford wiring harness problem so I took it to a Ford dealer. After 3 weeks they came back and said it was in the coach wiring so back it went to Camping World. Camping World has worked with Thor in an attempt to track down the problem and just last week (we are now at the end of March - 4 months) they again said it was in the Ford Harness. It is now back at the Ford dealership and they say that all indications still point to the coach harness. We are now in the 5th month without our coach and we are getting nowhere. Any suggestions? Has anyone ever attempted to pursue a "Lemon Law" case? I have been told it will be expensive and possibly take up to 18 months but I'm not sure I have any other good options.
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Old 04-02-2019, 09:00 PM   #2
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Brand: Thor Motor Coach
Model: 2013 ACE 30.1
State: Alberta
Posts: 708
THOR #2631
Unfortunately you are in the Thor Ford ping pong game and likely neither one wants to spend the time really finding out where the trouble is located.....it is easier to finger point. If you are electrically experienced you could try to find the trouble yourself (likely a grounded wire somewhere where it should not be) but it would take some time and having the schematics for your coach would be a definite asset. There are folks on the forum that do have complete schematics for their coaches (unfortunately not me....too cheap and so far no requirement...knock on wood). You can log onto Ford for a fee based on time taken to access to their data and pull schematics or try to use what you can find on line or from other years to try to isolate where the ground problem is. It is typically a frustrating business. In the mean time though you can identify a few things to help troubleshoot:
1. What fuse(s) actually blow and in which fuse panels?
2. Do fuses blow only when the left turn signal is applied; or right; or it does not matter which side is operated first?

3 Likely fuses blow for brake application as well.....but before signals are applied?
4. Any work done in the dash or around any of the signal lights front or rear prior to the trouble starting (even changing a bulb)?
5. Any work done on trailer hitch/ electrical connectors etc prior to problem?


You can't keep blowing fuses as you try to test it unless you have a cheap supply of them. It is better to try to work from schematics and see if you can break the circuit (disconnect cct connectors where possible) in various places to help isolate where the problem is and repair it. I have some generic schematics which might help but of course they assume that Ford has not changed the basic schema. My sympathies in the mean time.
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Old 04-02-2019, 09:38 PM   #3
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Brand: Thor Motor Coach
Model: ACE 29.3
State: Missouri
Posts: 396
THOR #5437
A big problem no question about that. As much as you may want to get either Ford or CW to fix the problem you may be farther ahead finding it your self. In reading your post everything worked before the issue started happening. Added on to what was already said I would start looking at the back of the light panels. Pull each panel and look at the connections follow the wires the best you can. If you are pulling something look at the connection there. If you narrow the possibilities it may be easier to get either Ford or Thor on board. I had a problem with lights and it ended up being ground wire had rubbed all the insulation off and was touching metal. It could be the smallest thing.
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Old 04-02-2019, 10:18 PM   #4
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Model: ACE 27.1
State: Florida
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THOR #7035
Quote:
Originally Posted by kenwebber3 View Post
Has anyone ever attempted to pursue a "Lemon Law" case? I have been told it will be expensive and possibly take up to 18 months but I'm not sure I have any other good options.
"Lemon Law" path depends on your state. In Florida, you would have a case as your problem effects the safe motor vehicle operation and no lawsuit is required, only paperwork filled out and deliver to the appropriate parties.
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Old 04-03-2019, 01:26 AM   #5
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Brand: Thor Motor Coach
State: Ohio
Posts: 87
THOR #12726
Quote:
Originally Posted by kenwebber3 View Post
I'm not sure if anyone has had this problem but I am quickly running out of options other than going through a "Lemon lawsuit" with Thor or Camping World. We purchased our 2018 Thor Ace 29.3 in January 2018. It has less than 5K miles on it. In November, while on a trip, I lost brake lights and blinkers. Both a mobile tech and Camping World attempted to fix it by replacing the blown fuses. Every time I would turn on the blinkers it would blow the fuses, before I could even get out of the parking lot. Camping World then said it was a Ford wiring harness problem so I took it to a Ford dealer. After 3 weeks they came back and said it was in the coach wiring so back it went to Camping World. Camping World has worked with Thor in an attempt to track down the problem and just last week (we are now at the end of March - 4 months) they again said it was in the Ford Harness. It is now back at the Ford dealership and they say that all indications still point to the coach harness. We are now in the 5th month without our coach and we are getting nowhere. Any suggestions? Has anyone ever attempted to pursue a "Lemon Law" case? I have been told it will be expensive and possibly take up to 18 months but I'm not sure I have any other good options.
You can always do what my dad did to our ford dealership after his new pickup had so many problems,and he told the ford dealership to either buy it back or he was going to park the truck in his front yard with a big picture of a lemon and said Bought at (our ford dealer) and it worked they took the truck back and refunded his money.
Did you check the plug on the rear for trailer towing? I think you can unplug that end and see if your lights and signals work,or find the plug along the frame for rear lights and unplug it and see if you still blow fuses,
I have seen 1 time in 10 yrs of working on heavy duty trucks that a brake light bulb was shorted out in the bulb and kept tripping the breaker and by unplugging each light one at a time by process of elimination found the problem.
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Old 04-03-2019, 05:37 PM   #6
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Model: Fleetwood Storm 32V - pre
State: Alabama
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THOR #6826
I agree with trying to fix it yourself. It is possible but unlikely that a wire inside a wire loom or the steering column has shorted to something. Much (MUCH) more likely that something is shorted at one of the lights. Some very specific troubleshooting questions: with new fuses will they blow when applying the brakes only? With left turn only? With right turn only? I.e. which specific individual action triggers the short. Iím guessing it wonít be all three. If brakes do it and one turn signal Iíd look at the rear bulb socket for the side that causes the problem. Likely there is water in it. If both the brake and turn signal fuses always blow at the same time itís very, very likely that the rear bulb is shorted as that should be the only place both circuits have a common connection. Best of luck.
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