70 Safety Sentinel Speedometer
#1
70 Safety Sentinel Speedometer
I have a 70 safety sentinel speedo which needs a repair to the little hair spring in order to operate correctly. Before I think of having it repaired, I was wondering what would be involved in order to have it operate in my 71 442. I know it's not correct, but I thought it might be a neat novelty item to have. This speedometer has five pins on the back instead of four on the regular speedometer, so is it easily possible to wire it up so it would operate? Anybody tried this? Thanks.
#2
The hi beam headlight lens needs to be changed from red to blue. There should be a 3 legged buzzer that plugs into 3 female plugs on the back. I'm not sure about that 5th pin on the back. I don't know where it gets power from? Maybe it show in the assembly or service manual? Other than that, it should be plug & play.
Here are a couple pix for reference.
Here are a couple pix for reference.
#3
Just an Olds Guy
Join Date: Jul 2008
Location: Edmonton, AB. And "I am Can 'eh' jun - eh"
Posts: 24,525
I'm curious to see what you find out. I also have a 70 speedminder speedo (works) but want to restore it before plugging it into my 72. Like you I just like the idea. Possibly the extra pin is the power feed to the buzzer (relay)
I can't find it in the 1970 electrical schematic or the 1970 CSM??
I can't find it in the 1970 electrical schematic or the 1970 CSM??
#4
Just an Olds Guy
Join Date: Jul 2008
Location: Edmonton, AB. And "I am Can 'eh' jun - eh"
Posts: 24,525
Looking at Scott's pics it appears the center pin is the power pickup for the relay. The other side of the relay appears to ground out through the casing.
Scott, can you post a pic of the backside of a 71 or 72 speedo? I'm not worried about the high beam indicator color...
Scott, can you post a pic of the backside of a 71 or 72 speedo? I'm not worried about the high beam indicator color...
#7
Thanks for the help guys. Allan, now that I have you motivated to try this upgrade, I'll await your results in tapping into power to run the buzzer, before I send my speedo to Redline. I love it when a plan comes together.
#9
If you're somewhat mechanical, the odometer can be set to what ever you want. There is a little paper keeper that holds the numbers in place, you have to be careful not to damage that or your're in trouble. If you have some extra speedos, you can practice on those. If not, I can send you a rough one to play with.
Scott
Scott
#10
Just an Olds Guy
Join Date: Jul 2008
Location: Edmonton, AB. And "I am Can 'eh' jun - eh"
Posts: 24,525
#13
I got my tic toc tac back from Redline Instruments, all repaired and cleaned up. A great guy to deal with. The coil in the circuit board was gone. He had one and fixed in in one day and sent it on its way. Great friendly service. My point to all this, is that I spoke with him about these speedos and he says he can repair mine and that I should consider sending it to him for refurbishing. He says they can be finicky to set up, but doable. The little hairspring on mine is broken and stretched, but I tried the buzzer with power and it buzzes, so it may be worth doing. He says they are quite rare and a very desirable option with the last one he had selling for $450.
#14
Thanks for the update. Are you going to send your speedometer in to them to get it repaired? I would have to weight the cost compared to what it could be worth in the end. Even if the buzzer does not work it still is a neat gauge to have in the dash.
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