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Need help with tach wiring

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Old Nov 19, 2020 | 08:50 PM
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Default Need help with tach wiring

I have a 1979 that I replaced on the dash and center console bulbs as well as the circuit boards. But now I can’t figure out a few things:
1. What plugs into the back of the tach?
2. Why would my right tail light and signal not work?
3. I haves brown and gold two prong plug and an orange and green one ( both near the steering wheel column that have no where to go
4. I have a brown wire coming out f my fuse box with no where to go
5. And now half my center gushes and my radio won’t work.

I’ve checked all my fuses and all are good. Not sure how to fix all of this. Any help would be greatly appreciated.

oh, and I dropped my speedometer and the needle broke off. 🤬
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Old Nov 20, 2020 | 01:41 PM
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http://repairs.willcoxcorvette.com/category/tach/

tach pushes in to studs..
great resource above..
get the aim and or wirking diagram too

also pictures get better response
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Old Nov 20, 2020 | 03:09 PM
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Thanks for that. I’m new to this so not quite sure how to go about it. I just know I’m lost.

Here’s the back of my tach. New circuit board isn’t on yet. Can’t figure out what plugs into it though.



Last edited by Thomas Schacher; Nov 20, 2020 at 03:27 PM.
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Old Nov 20, 2020 | 03:13 PM
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Here's the orange and green wire and the blue capped connector near the fuse box. They don't seem to go anywhere. ???

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Old Nov 20, 2020 | 03:18 PM
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Here's the wire I found hanging out from the back of the center console. It leads to a split - one goes to a connector for the radio and the other goes to a green and green wire that goes up the passenger side of the dash. I can't trace it any further.

Wire that comes from radio plug but then splits off into a green and lighter green wire that runs to the passenger side of the dash and up. Can't trace it any further

Wire going to radio plug and then plotting off

This comes from the radio and says "ignition"

green/green wire going up passenger side of dash. Comes from that split off the radio plug in.

Last edited by Thomas Schacher; Nov 20, 2020 at 03:26 PM.
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Old Nov 20, 2020 | 03:19 PM
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Here's the vacuum on the back of my AC/Heater. I'm not sure this is hooked up right and there's an extra black and white vacuum tube that seems to go nowhere.

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Old Nov 20, 2020 | 03:40 PM
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Here's another plug coming from the main harness on the driver's side. It seems to have nowhere to go.
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Old Nov 20, 2020 | 06:26 PM
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Then red wire from the radio marked "ignition" says that it goes to a 12 v source that is only on when the car is on. Where is that found in the center console?
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