84-85 Trucks & 4Runners 2nd gen pickups and 1st gen 4Runners with solid front axles

tachometer install

Old Nov 21, 2008 | 02:34 PM
  #1  
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From: Fort collins, CO
tachometer install

I have all the wires connected except for the white one or the light wire. Does anyone have suggestions on where to connect this one at?
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Old Nov 21, 2008 | 03:26 PM
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is this for an after market tach?

or, are you installing a SR5 cluster?

i'm just asking as i installed an aftermarket tach.

joel
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Old Nov 21, 2008 | 03:30 PM
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just follow up...

i used this thread for my install:

https://www.yotatech.com/forums/f116...-22r-e-127036/

joel
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Old Nov 21, 2008 | 05:00 PM
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Assuming an aftermarket tach, as the thread title implies, the purpose of the white wire might help get a better answer. For the light wire, you have a couple of choices. Since if there is a single light wire, that implies the other side of the light is grounded to the tach ground connection. As such, you won't be able to connect the wire to the dimmable dash light circuit since it is wired with a floating ground (this is where the dimmer is connected). So you can hook it to the switched power for the tach, that would have the back light on any time the engine is running, same power that the tach itself needs. Or you could hook it to something like the parking light circuit which would turn that light on and off with the main vehicle lights.
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Old Nov 22, 2008 | 07:04 AM
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I put it in with the ignition fuse... it is on all te time so i think i might cahnge it to the parking light if its not to hard.
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Old Nov 22, 2008 | 12:03 PM
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From: Austin, Texas
Originally Posted by 4Crawler
Assuming an aftermarket tach, as the thread title implies, the purpose of the white wire might help get a better answer. For the light wire, you have a couple of choices. Since if there is a single light wire, that implies the other side of the light is grounded to the tach ground connection. As such, you won't be able to connect the wire to the dimmable dash light circuit since it is wired with a floating ground (this is where the dimmer is connected). So you can hook it to the switched power for the tach, that would have the back light on any time the engine is running, same power that the tach itself needs. Or you could hook it to something like the parking light circuit which would turn that light on and off with the main vehicle lights.
I was thinking something like that, just couldnt put it in words !

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Old Jan 7, 2009 | 01:45 PM
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From: cary north carolina
dash light power wire

pull your instrument cluster, you should have three wire blocks that plug into the cluster. the center plug has the power wire in it , if you use a tester light check for power to find the power wire by turning your head lights on and off .... when your test light [lighting up] corresponds with your headlights you have found the wire you need to splice in to . hope this helps good luck
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Old Jan 7, 2009 | 01:52 PM
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From: Salem, OR
Originally Posted by 4Crawler
Assuming an aftermarket tach, as the thread title implies, the purpose of the white wire might help get a better answer. For the light wire, you have a couple of choices. Since if there is a single light wire, that implies the other side of the light is grounded to the tach ground connection. As such, you won't be able to connect the wire to the dimmable dash light circuit since it is wired with a floating ground (this is where the dimmer is connected). So you can hook it to the switched power for the tach, that would have the back light on any time the engine is running, same power that the tach itself needs. Or you could hook it to something like the parking light circuit which would turn that light on and off with the main vehicle lights.
The problem with this is the tach back light will always be the brightest it can possibly be. Not too bright, but its annoying when you want to dim all of your other lights and that one is still bright.
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