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Messages - Bob99b5

1
Electrical Tech / Dome light, power locks, power mirror, digital speedo all out
It's FIXED!!!!  But before I tell you what it was I first want to say THANK YOU, THANK YOU, THANK YOU to all of you that offered suggestions of where and how to look, and especially for the links to and jpgs of the wiring diagrams.  I even have to say it again:  THANK YOU.

The problem was the driver side lighted visor vanity mirror.  The wire had a small cut on the side which shorted against the mounting bracket.  One piece of electrical tape, one new fuse, and everything's back to normal.  I also have to say thanks to a wonderful person at Tasca Ford/Lincoln/Mazda in RI where we bought the car brand new in 1985 (they were in Seekonk, MA at the time).  I told him I had isolated the short to circuit 8 with the help of everyone on this board, and he immediately replied via email and said that the frayed visor wires are (I suppose the right verb would be "were" given that there probably aren't many 32 year old Cougars on the road anymore) a common cause of short circuits like this.  Funny thing is I did have the headliner replaced 3 years ago, but I don't think that had anything to do with it.

It all makes sense now.  I lowered the visor when driving to a car show in the late afternoon, and I noticed when we were leaving the show that the speedo and odo were out.  The clock stopped at 7:55pm (which was when we left), so I'm thinking I must have raised/used/moved the visor on the way out and shorted out the circuit.

Long story, I know, but problem solved and hopefully someone will find this handy if they ever search for a similar issue.

Thanks again everyone!
2
Electrical Tech / Dome light, power locks, power mirror, digital speedo all out
Quote from: MobileBill23;456058
Lovely, a short to ground.  Have fun looking for it.  Some suggestions - get a wiring diagram and find the closest connector to the fuse, then unplug it.


Thank you, this will not be fun,  I'm sure it's going to be a long process. Does anyone here have a 1985 wiring diagram they can post. I called my dealer today and they only have back to 1989.
4
Electrical Tech / Dome light, power locks, power mirror, digital speedo all out
85 cougar 5.0. Everything was working fine. Noticed digital speedo back light is on but speedo display and odo are dead (not a bulb issue, can dim and brighten the display but the numbers are not showing up at all in the LCD). Then noticed power locks are dead, as are dome light and power mirrors. Searched threads, checked all fuses under dash and they all test good. Any ideas??  Did not check circuit breakers or any fusible links.