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Install factory tach into my blazer...or clean it up and sell it?

broncoman6524

broncoman6524

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well as i was lookin around the yards today for my vent window i happened upon this :) i bought this for a whopping $25:D
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it came out of a late 70s k10

is there a was htat i could wire it up into my 84k5? and for the tach and having my msd i would have to run it from my msd box into the harness correct?

and anybody seen this before?
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they were just wires that were spliced into the factory wiring connetor

so i guess my question is is it possible to put into my DD and get rid of my sunpro on the dash cover...or just clean it up put it on ebay and make a pretty penny?
 
Man I'd love an in-dash tach but I'm not going to mess up my '73 trying to rewire the dash. Nice find. If my truck wasn't so pristine and original I'd trade my overly-huge in-dash fuel gauge for a tach any day.
 
i saw the truck and the gauges and got all excited my dads like woohoo a tach big deal....he just doesnt get it...it must have been because he had a jeep when he was my age...:doah: :haha: from what he said it was bad though, small block detroits front and rear, 36hawgs.anyway back on topic:doah:...haha
 
There is a stand alone 3 wire harness for the tach, did you get that? If not, go back and pull it too.

It can be installed into your truck fairly easily, I did this years ago on my old K10. Obviously, the only 2 gauges effected during the install are the tach and fuel so don't worry about anything else.

One mine... I clipped the wires from the trucks harness for the fuel gauge and ran them directly to the back of the new one (just like the blue wires in your pic). Since the tach has it's own harness none of that matters, just run the appropriate wires as needed (ign hot, tach signal and something else - can't remember). I was running an MSD 6AL and the tach worked fine by hooking the OE harness to the MSD tach output. The only thing I can't remember for sure was the printed circuit sheet on the back of the cluster. I think I reused the original from my truck.

You've probably noticed that the fonts for the gauges are different between your originals and the tach cluster. Personally I'd run the tach cluster as a whole because I hate mixed fonts, if they all match fewer people will noticed the tach was added after the fact.
 
nvrenuf said:
You've probably noticed that the fonts for the gauges are different between your originals and the tach cluster. Personally I'd run the tach cluster as a whole because I hate mixed fonts, if they all match fewer people will noticed the tach was added after the fact.
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I agree. That cluster is from '76-'79. The gauge markings are different even from my '73, most notably the speedo with the kilometers per hour markings.
 
sell it to me for a fair price via PM! :) id love a tach for my diesel. unless im find a decent deal im going to go aftermarket

sweet find
 
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muddybuddy said:
sell it to me for a fair price! :) id love a tach for my diesel. unless im find a decent deal im going to go aftermarket

sweet find
Click to expand...

Its a fairly involved process to get a tach working on a 6.2 diesel... Expect to spend a fair bit on it, lol

That tach was retrofitted into that truck, stock there is a special housing and circuit sheet that re-routes the wiring to the fuel gauge, and has an opening for the tach wiring.

The factory original tachs should bolt straight into your truck without any wiring modifications as long as you get one that is from the same basic year range as your truck (73/74, 75/76, 77, 78/79 and 80+).

The wiring is the same from 73-76, though there were different style of gauges, 78 - 86 are wired the same, but the color changed in 80 to orange, and 77, while wired the same as a 78+ unit, still has a mechanical oil gauge, but has been upgraded to the volt meter from the older amp gauge.
 
I was looking into one of those for my truck is there a way to reset the milage so its the same as i have now
 
Yep, its easy, just swap your old speedometer into the new cluster. Means you have to get the same color tach as your speedo is though.

And yeah, if you do wind up with an orange tach by some chance (they are tough to find), you can modify the odometer's numbers, but it takes a lot of time, and is a real pain in the butt. Bit like figuring out a rubric's cube (or however it is spelt, lol)
 
grr so i guess that it isnt a "bolt in" ?


i guess ill save it for the mud truck and jjust try adn finda cab in the years of the late 70s...hsould i still go and find that special harness for the tach?
 
Looks neat. Id sell it personally, instead of monkeying with retro fitting it in and risk screwing up BOTH sets of gauges. my .02
 
If you know whats going on, wiring it up should be easy, but if you arn't an electrically savvy guy, I'd just sell it on ebay :)
 
eh im alright....im not retarted and im not the best, i did figure out what was wrong with my gas gauge...haha.

im not sure what im going to do yet...
 
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