bart1

On the 74-89 911 clocks, what does the white hand do? Does anybody know where I can find a description of what each connection is for on the back? I assume there is a +12V for power and one for illumination. Is there one for ground? Anybody have a good one they want to sell?

Thanks for any input.

butzip

The white hand simply allows you to 'move' the 12' o'clock position. i.e. if it's ten minutes after the hour, move the white hand over the minute hand now you know where you started. The elapsed time is now the difference between the minute hand and the white hand. Make sense?

Clocks are simply 12v+ power spade, a ground spade and light bulb receptacle. each is marked on the back as well as fairly obvious.....

I just picked up a perfect one from e-bay for $25 shipped. That was a score as they usually go for more ave approx. $75....

rusnak

I like the white pointer hand.

In the days before GPS, I would set the pointer on the hour indicator, before leaving on a trip. I could use the slide rule on my watch to figure out my arrival time, or I could back into the average speed needed to arrive at my desination at a given time based on time elapsed and mileage covered. This was especially useful if I was delayed by traffic or made a short stop and needed to compute speed needed.

dshepp806

I like it, too.....let's me know how long I've run that engine!!!!!!!

bart1

Makes sense. I use a dive watch with elapsed time function. Had no idea that's what the white hand on the 911 clock was. Sounds like the wiring is easy, too. I assume there is a separate 12v connection for the power and the light.

RL911

three connections on back, ground, hot, bulb. Very easy to replace, just don't let the hot touch metal when you take it off or you'll short something (Unless you disconnect the negative on your battery.)

The clocks in this year are notoriously bad. Mine stopped working, replaced with one from a C2, much brighter light. Only issue is DST, no **** to adjust the time as the car it came from had an electric switch to adjust it, mine doesn't, oh well, every 6 months it will be right, rest of time off by an hour.

rusnak

I don't want to come off like a wisenheimer, but my clock is extremely accurate. It's comparable to a swiss quartz watch. My last 911, an 'SC, also had a very accurate clock.

RL911

no offense taken, consider yourself lucky and I hope it keeps on tickin'...mine did last 23 years, but I've heard many stories of bad clocks like the one I had in my 86.

bart1

I'll probably figure it out when (if) I get my hands on one, but how do you adjust the time?

I found a pic of the back of one, and there are very few connections.

Does anybody have a good one they can sell? My other one I was looking at fell through.

rusnak

The time is adjusted with the center ****. Push and turn. If I ever need to send mine in for repair, I'd like to have the plastic lens replaced with glass.

I think you can easily find one at the usual dismantlers, or at the speedo shops.

Mitch Leland

I bought a second clock second hand (no pun intended) and it lasted about a month, so I decided to take it apart to see if I could clean it, maybe make it work. I got the bezel off OK, but wasn't able to repair it... But the "works" of the clock looked like they came out of a Cracker Jack box. A lot of plastic parts, thank God the same guy didn't make our engine...

butzip

No, but they did make the speedometer, which another pile of questionable parts.

bart1

Well, I found myself a clock, so we'll see. Have a nice little project planned.