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Old 07-14-2009, 08:19 PM   #1
KevsClassics
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Speed warning dash

I am installing instrument cluster with tach/vac and speed warning on customers truck. problem is he does not have wire harness for buzzer. does anyone have wire diagram for buzzer? Also pic of correct spot for knob?
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Old 07-14-2009, 08:44 PM   #2
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Re: Speed warning dash

kevin,
here are a couple of links that may help you out.

http://67-72chevytrucks.com/vboard/s...=speed+warning



http://67-72chevytrucks.com/vboard/s...=speed+warning



good luck

Heath
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Old 07-14-2009, 08:47 PM   #3
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Re: Speed warning dash

My GMC dump truck has a speed warning dash, but it has a 2 piece speedometer cable with a sensor in between them.

I don't think a speed warning/ vacuum dash came in the smaller trucks, but I could be wrong.

Danny
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Old 07-14-2009, 08:57 PM   #4
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Re: Speed warning dash

Kevin in the top corner near headlight hole in dash is a dimple/ location dot for the speed warning knob cable. Drill a 3/8 hole and the cable will slide through this. There is a reproduction wiring harness available for $20 or less that works as original. Radio shack sell as buzzer that will work as well - look in the "buzzer" section you ma have to adapt a little (2 spade terminals on the buzzer) but buzzer has holes to mount as original. Hope this helps -Harold- If you need to see location hole please let me know and I can email you a picture.
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Old 07-14-2009, 09:57 PM   #5
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Re: Speed warning dash

Quote:
Originally Posted by my67chevytruck View Post
kevin,
here are a couple of links that may help you out.

http://67-72chevytrucks.com/vboard/s...=speed+warning



http://67-72chevytrucks.com/vboard/s...=speed+warning



good luck

Heath
Yes this helps alot. Thank you, Kevin

Quote:
Originally Posted by 71 super View Post
Kevin in the top corner near headlight hole in dash is a dimple/ location dot for the speed warning knob cable. Drill a 3/8 hole and the cable will slide through this. There is a reproduction wiring harness available for $20 or less that works as original. Radio shack sell as buzzer that will work as well - look in the "buzzer" section you ma have to adapt a little (2 spade terminals on the buzzer) but buzzer has holes to mount as original. Hope this helps -Harold- If you need to see location hole please let me know and I can email you a picture.
Yes this also helps me. Thank you, Kevin
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Old 07-14-2009, 09:06 PM   #6
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Re: Speed warning dash

Ok, so for a speed warning novice, how does this thing work? And at what speed does it become a wife... I mean, tell you you're going too fast?
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Old 07-14-2009, 09:47 PM   #7
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Re: Speed warning dash

the speed warning was more of a speed alert, a primitive cruise control so to speak.

there is a secondary needle that is located behind the speedometer needle that can be adjusted by a knob located to the upper left of the speedometer, this is the speed warning needle. there is a very small contact attached speed warning needle. when the speedometer needle touches the s.w. contact, it creates a circuit that activates a buzzer that is attached to the firewall.

interesting and rare device.
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Old 07-14-2009, 10:17 PM   #8
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Re: Speed warning dash

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Originally Posted by tcb-1 View Post
the speed warning was more of a speed alert, a primitive cruise control so to speak.

there is a secondary needle that is located behind the speedometer needle that can be adjusted by a knob located to the upper left of the speedometer, this is the speed warning needle. there is a very small contact attached speed warning needle. when the speedometer needle touches the s.w. contact, it creates a circuit that activates a buzzer that is attached to the firewall.

interesting and rare device.
Thanks for the info. I'll give you that it's interesting, but it sounds like the LAST thing I would ever want on a vehicle! Unless of course you set it at like 100 MPH.
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Old 07-14-2009, 10:24 PM   #9
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Re: Speed warning dash

yep, you can set them between 35 and 100 mph.
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Old 07-15-2009, 10:35 AM   #10
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Re: Speed warning dash

Pic...



I have a vac gauge in the mail to put in also. Dont know if im going to put it a tach yet or not.

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Old 07-15-2009, 11:57 AM   #11
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Re: Speed warning dash

Nick just from what I see it looks lik you have a pretty cool truck! Speed alert and overdrive. Is the overdrive still operational? There are not many of the overdrives still around, so we need more pictures
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Old 07-15-2009, 02:24 PM   #12
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Re: Speed warning dash

The overdrive didnt work when I bought it, the PO didnt know anything about it. went to the chevy dealer in town and was told it was never available from chevy and it was a aftermarket thing. After a few hours with a test light and a trip to the parts store ( they knew nothing either ) I found a 15 dollar solenoid that looked right and should work. took her down the road in OD. works great!

and to keep this post about the thread....... does adding a speed warning dash to a tach dash means you have to cut the tins?
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Old 07-15-2009, 03:07 PM   #13
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Re: Speed warning dash

You can buy a new inner tach tin from GMC Pauls for around $50, but you will have to cut the outer tin for the tach to fit through or drill a tach back tin for the speed alert cable to go through and the ground to connect to.
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Old 07-15-2009, 08:12 PM   #14
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Re: Speed warning dash

Does anyone have a picture of where the buzzer mounts? I have a speedminder but am not sure of the correct buzzer mounting location. I got my buzzer at a O'Riellys parts store and also had to use the spade terminals. The original harness would not mate up to it.
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Old 07-15-2009, 11:26 PM   #15
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Re: Speed warning dash

did some searching in the links above....

[/
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Old 07-16-2009, 11:49 AM   #16
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Re: Speed warning dash

Thanks for the pic, that is just what I was looking for.
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72 SWB. Med blue. 454/400 turbo, tach, tilt, Stock AC, PS,PDB, factory buckets, console, ECE 4/6 drop w/ 2" blocks and C-notch, 20/20"Coys- Crashed and destroyed by drunk driver Sept 2019. New 72 build in the works.

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