Recent Posts

31

Technical Support / Re: Headlights not working??

« Last post by Steve Huber on October 14, 2025, 02:41:56 PM »

I wrote them up so if you have ?s let em know and hopefully my memory won't fail me.
Steve

32

Technical Support / Re: Headlights not working??

« Last post by RogerMilne on October 14, 2025, 03:43:50 AM »

Sounds like you're on the right track! In case you didn't find them, the Dim Headlight Mod diagrams are below the Wiring diagrams on Coach Assist.
Steve

Yeah I saw them and need to print them off. Then I need to trace back the wires and find out where the Mod' started and go back from there.

Thanks

33

Technical Support / Re: Headlights not working??

« Last post by Steve Huber on October 14, 2025, 12:29:20 AM »

Sounds like you're on the right track! In case you didn't find them, the Dim Headlight Mod diagrams are below the Wiring diagrams on Coach Assist.
Steve

34

Technical Support / Re: Headlights not working??

« Last post by RogerMilne on October 13, 2025, 10:48:45 PM »

So a quick follow up since the rain started again.

So unplugged the Lo Beam wire coming from Smart wheel ( the one PO had cut into for light bar) got Hi Beam and Lo Beam but as soon as I plugged it back in the #69 dimmer control fuse blew.

So I need to trace the wiring for that circuit to see what he's done down stream. I'm thinking he has a wire feeding somewhere that may have been in conjunction with the relays I removed ( believing they were for switching the LED light bar), but now thinking he may have done it as part of the Dim Headlight mod'. So now I have to figure out how to retro wire that mod' and see if I can get a good Lo beam circuit.

35

Technical Support / Re: Headlights not working??

« Last post by RogerMilne on October 13, 2025, 10:11:39 PM »

So for those following along, here's what I discovered today.

After trying to find the voltage at the plug ends, I discovered that I have residual voltage of about 2.4V constant on the Hi Beam circuit. Parking light circuit 0V off, 14V on. (so that's good) Lo Beam 0V on or off. Hi Beam 2.4V on or off.

So I checked every fuse associated with all lights and all good except I discovered the dimmer fuse #69 blown. Which I can't figure out because when you pull the dimmer knob out the dimmer works on the instrument panel bulbs and parking lights, BUT when I replace it the headlights worked in High Beam, but when I switched to Low Beam it blows. It started to rain so I can't check if I start in Lo Beam if it works and then blows when switching to Hi Beam. But it seems there's an issue on the dimmer circuit?

So he did cut a wire and tapped into the Lo Beam wire on the steering column, but I cut his hack out and straight connected the wire together. Just for reference the hack he did was to feed 2 relays through a switch to go out to the LED light bar on the front. I removed that and the relays and any associated wiring. But now I'm wondering if I'm back feeding the dimmer switch somehow as the Lo beam wire he hacked was coming from that but I thought I was just re-connecting the wire minus his tap in for the light bar.

The rain just quit, so I'm going to try and put a new fuse in and see if I can get Lo Beam and see if I can switch to Hi Beam or if the fuse blows. Will post the results shortly.

36

Technical Support / Re: Headlights not working??

« Last post by RogerMilne on October 13, 2025, 09:55:31 PM »

Roger,
The 2008 Contessa wiring diagram file in Coach Assist Wiring Diagrams contains the complete wiring schematic for the headlight circuit. It is drawing # 38085026 and is labeled 2008 Camalot/Septer but is also applicable to the 07 and 08 Contessas. It, along with the layout diagrams in the 07/08 Contessa wiring files should enable you to pinpoint where you are losing voltage and/or how the po's mods were implemented. There is also a diagram of the headlight mod to improve the voltage to the lamps as the oem version ran voltage thru the headlight switch, resulting in a reduction at the headlights themselves.
Good Luck  Steve

Yeah I have the schematics and have been a big help so far. Still trying to decipher whether or not he hacked the wiring just for the LED bulb conversion or if he did the Dim Headlight Mod'.
So far it doesn't seem like he has, but in order order to eliminate his hacking I needed to know if the DRL module would be a link in the problem and it doesn't seem to be.

thanks for the input and I'm about to update the post with todays trouble shooting results and let me know what you think.

37

Technical Support / Re: Headlights not working??

« Last post by Steve Huber on October 13, 2025, 01:28:22 PM »

Roger,
The 2008 Contessa wiring diagram file in Coach Assist Wiring Diagrams contains the complete wiring schematic for the headlight circuit. It is drawing # 38085026 and is labeled 2008 Camalot/Septer but is also applicable to the 07 and 08 Contessas. It, along with the layout diagrams in the 07/08 Contessa wiring files should enable you to pinpoint where you are losing voltage and/or how the po's mods were implemented. There is also a diagram of the headlight mod to improve the voltage to the lamps as the oem version ran voltage thru the headlight switch, resulting in a reduction at the headlights themselves.
Good Luck  Steve

38

Technical Support / Re: Headlights not working??

« Last post by RogerMilne on October 13, 2025, 03:49:00 AM »

Roger,

I'll give this a shot, but we have different coaches.  On mine the DRL's are on a separate switch and I don't have a smart wheel. 
I would start by going to the headlight plug ends and verify if there is 12 volts there or not.  I would work backwards form there to the splices, they could have been done poorly and no longer pass electric current, or at least not enough.  From there back to the electrical panel under the drivers area and the solenoid, working back toward the switch in the smart wheel.

Have you verified that the bulbs have not burned out?  Tried running a temporary extra ground?  Try the simple things first.  Fixing someone else's handiwork can be challenging.

Hopefully this will help you some.

Thanks for the reply Carl so yeah definitely maybe a little differences in our models and that’s kind of where I’m trying to eliminate the simple stuff to begin with.  I have a smart wheel as I said and the owners manual doesn’t talk about a separate switch for the DRL‘s so that’s why I was wondering where the DRL‘s where on this model and year plugged into the harness and then went to both headlights that he obviously has removed because I obviously have the DRL plug that goes back into the harness I’m guessing through the main fuse panel but I don’t know if the five pin flat connectors that he has to run the headlight units I’m guessing were originals and he just spliced them on the headlight side to make the two pin connectors where the bulbs would be so that the LED lights can be used versus plugging straight into the halogen bulb.
I’m going to try and get some pictures tomorrow and post those with what I think he did. Also check for voltage at the end of the connectors and make sure that I’m at least getting low and high beam voltage.

39

Technical Support / Re: Headlights not working??

« Last post by Carl Boger on October 13, 2025, 12:04:31 AM »

Roger,

I'll give this a shot, but we have different coaches.  On mine the DRL's are on a separate switch and I don't have a smart wheel. 
I would start by going to the headlight plug ends and verify if there is 12 volts there or not.  I would work backwards form there to the splices, they could have been done poorly and no longer pass electric current, or at least not enough.  From there back to the electrical panel under the drivers area and the solenoid, working back toward the switch in the smart wheel.

Have you verified that the bulbs have not burned out?  Tried running a temporary extra ground?  Try the simple things first.  Fixing someone else's handiwork can be challenging.

Hopefully this will help you some.

40

Technical Support / Re: Running new a/c hose for dash air

« Last post by Zeb Severson on October 12, 2025, 06:42:44 PM »

Thats a good point Eric about checking the other hoses and adding ball valves. My slide hydraulic were blistering, and were routed poorly through the frame rail where they were cutting into the hose. I will make sure I will check on what hoses I can see and get to my new chassis lube.