BAC Forum

General Boards => Technical Support => Topic started by: Bob Bulot on June 17, 2019, 09:29:30 PM

Title: WINDSHIELD CURTAIN FUSE
Post by: Bob Bulot on June 17, 2019, 09:29:30 PM

Lost power to my electric windshield privacy curtain.  Anyone know where the fuse is?  Can’t find it.

Title: Re: WINDSHIELD CURTAIN FUSE
Post by: Bill Lampkin on June 17, 2019, 10:10:39 PM

Bob, on my Patriot, I would check for voltage at the switch, which in my case is in a cabinet above drivers head.
My '05 PT manual says the power curtain is fused with the fantastic fans on fuse #8. I'm sure your Marquis is different from my PT.

Title: Re: WINDSHIELD CURTAIN FUSE
Post by: Fred Cook on June 17, 2019, 11:32:53 PM

Mine is in the 12 volt panel box in the rear bedroom closet. Good luck.

Title: Re: WINDSHIELD CURTAIN FUSE
Post by: Bob Bulot on June 18, 2019, 03:59:09 PM

Thanks Bill and Fred.  My curtain is controlled by a multiplex switch.  If I understand this system, some of the multiplex switches control things like the lights through the PCM, while others directly operate relays for electrical items that have regular fuses in the 12 fuse distribution panel.  Am I correct here?

In any event, I have checked every fuse I can find, and my fans are all working, so I must have other problems.  There is no voltage at the wires that the curtain plugs in to.

Title: Re: WINDSHIELD CURTAIN FUSE
Post by: Steve Huber Co-Admin on June 18, 2019, 05:42:11 PM

Bob,
You could have a dirty or bad switch in the multiplex pad. You can remove the switch cover to check. http://beaveramb.org/forum/index.php/topic,6433.msg46893.html#msg46893
or   http://beaveramb.org/forum/index.php/topic,7496.msg52610.html#msg52610

Lot of added info on Forum. Do a search on "multiplex".
Steve

Title: Re: WINDSHIELD CURTAIN FUSE
Post by: Scott Shearer on June 19, 2019, 03:44:23 AM

Bob,

You may already gone down this route. 

Attached is a diagram for 2007 Patriot and Marquis.

It looks like for '07, the curtain open & close functions are on the multiplex module 'A' (located in the bedroom closet). You can check the output on pins J3 1 & 2, also there are green LED indicators on the output pins and a separate fuse for both the open and close functions (on the multiplex module).

Title: Re: WINDSHIELD CURTAIN FUSE
Post by: Bob Bulot on June 19, 2019, 06:29:17 PM

Thanks Scott and Steve.  Turns out the main Multiplex panel in my floor plan is in the bathroom.  Also turns out that there is another panel almost the same size in the cabinet above the drivers side window (who knew?).  The fuse block you showed in your diagram is in this second panel.  Testing everything down to the motor that pulls the curtain, it turns out that one of the thin wires threaded through the curtain has apparently broken.  Big relief.  Wire I can replace.  Motor, not so much. 

Thanks to all for your help!