[agfours]

I bought an 87 coupe about a month ago and the speedometer has not worked since I've owned it. Here's where I am in the troubleshooting and where I'm stuck....

Situation:
No speedo, no odometer, no tripometer function.

Lights to speedo work, and I understand this means I have good ground. (however there are additional brown wires going to the speedo which do not seem to have ground...have not been able to figure out what these wires go to...cruise?)

I replaced the sensor twice already (went back to this as a possible cause due to a bad part as I understand is not uncommon)

Based on a tip in another post, i tapped the contacts together under the access panel and the needle jumps, and assumed understanding was that this indicated that the sensor was at fault, and all was good between the access panel wires to the speedo. Also ran continuity checks on the speedo wires to the access panel and those checked out ok.

So, i must be missing something or there is a fault in my troubleshooting logic. I.e. new sensor(s), rebuilt speedo verified with bench test and needle jumping test in situ, continuity on wiring, ground gives me lights thus should provide for the speedo function,....

Other information and looking for comments:
1. Auto heat not working...I understand that this is tied into the speedo for some reason....possible cause? Is there a way to eliminate this from the speedo circuit for testing?
2. Cruise is inop due to broken cable, and could also potentially be not working electrically
3. There are two wires in a dedicated sheath, one brown, one black with brown stripe that do not appear to be connected to anything (other end dangles in the

I will post a shot of the wiring on the speedo for any sharp eyes out there...