My odometer stopped working last week, and I was able to get a gear and replace it before I lost too many miles (about 300 according to my GPS)

I did the gear replacement last night with no problems, but wanted to ask a question about one of the connections to the board.

The connectors (half moon, etc.) nearest the passenger side of the car are straight forward, and the one that plugs in the board is clear.

Beside it though, there is a 2 pronged connection, but the connector that goes to that one only has one prong. Is there something that should be plugged into the other side? I've been in there many times before working on the clock, changing bulbs, etc. and I have always wondered about that connection.

Any help you could give me would be appreciated. I took a good picture of it, but can't seem to post it today.

Dow

I had this guy laying around from a misguided purchase back when I was still under the impression that all part from a model year were interchangeable. Those were the days...

If you are talking about the double prong connection beside the speedometer and near the large round connector it is the "taximeter" output from the speedometer. On your year it may be used for the cruise control. That would be one wire only. On later years nothing connects to these and they usually have a rubber cover on them.

Be careful what you plug into that. Many people have burned out their speedometer plugging the red/white tachometer wire onto this.

Do you have the tach or clock in your car? On the tach I know that there are some plugs that provide power to the 52mm accessory gauges, and I would suspect that it's the same on the clock if that is what you're referring to.

I put a diagram of the Cruise Control system that has detailed diagrams of the speedo (pages 3 and 4) that might help out. At least get us going in the right direction.

The diagram can be found here at: Cruise Control/Speedo Diagram

Many thanks for the diagram. I can use that. I have the big clock in the dash and the little tach over in one of the popout holes on the right of the instruments.

I goofed around with the clock on and off for a year and couldn't get it to work, so, like I said, I've taken that instrument group in and out dozens of times.

Finally, one Saturday I was bored and nothing was broken so I took all my fuses out, cleaned the panel carefully and installed new fuses. Clock started working again and has never missed a beat.

I told my daughter about it and she said "Sure, that's Occam's Razor- “When you hear hoofbeats, think horses, not zebras.”

In other words, check the most likely stuff first.

Orange wire goes to one side of the 2-prong connector. For cruise. otherwise it's empty. Do you have cruise control?

Good use of Occam's Razor.
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240s: 2 drivers and some parts cars

no cruise, so that explains the mystery! Thanks.

Dow