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> 1983 911 Tachometer, Wiring Diagram Needed
mmascari
post Apr 3 2017, 04:28 PM
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Anyone have a diagram of wiring connections for an '83 911 tachometer? I am going to connect to an MSD 6AL ignition. What are all the connections for? I suppose for turn signal lights which I don't care about.


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jcd914
post Apr 3 2017, 05:44 PM
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Look for a terminal marked as "TD" that would be the signal input for the tach.

Jim
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mmascari
post Apr 3 2017, 05:45 PM
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QUOTE(jcd914 @ Apr 3 2017, 04:44 PM) *

Look for a terminal marked as "TD" that would be the signal input for the tach.

Jim


Cool thanks Jim.
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mmascari
post Apr 3 2017, 05:47 PM
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QUOTE(jcd914 @ Apr 3 2017, 04:44 PM) *

Look for a terminal marked as "TD" that would be the signal input for the tach.

Jim


Actually, the terminals on mine are labeled 1 - 6 and HG and H+
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jim912928
post Apr 3 2017, 06:20 PM
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I'm out of town so don't have access to my files...but here is a link where I talked about wiring an 84 3.2. References which wires in the 3.2 harness go to which numbered terminals on the tach...and then the original 914 wires to the tach. Hope this helps:

http://www.914world.com/bbs2/index.php?sho...7&hl=wiring

First post and then the one with the lame picture of the tach installed are the ones to reference.

Jim
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mepstein
post Apr 3 2017, 06:34 PM
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'83 is still 3.0 SC, not 3.2
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jim912928
post Apr 3 2017, 06:38 PM
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edited...was a typo...I put in an 84 Carrera 3.2 motor
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Jeffs9146
post Apr 3 2017, 06:44 PM
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I would guess #2!

That tach looks different than mine but mine is an 82.

The stamp date is when it was manufactured not the model car it is for so it "could be" for a 3.2L. What is the part number on the inside top of the front side of the tach around the ring. Mine is 911 641 301 03.
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mepstein
post Apr 3 2017, 06:49 PM
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This might help


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mmascari
post Apr 3 2017, 07:12 PM
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QUOTE(Jeffs9146 @ Apr 3 2017, 05:44 PM) *

I would guess #2!

That tach looks different than mine but mine is an 82.

The stamp date is when it was manufactured not the model car it is for so it "could be" for a 3.2L. What is the part number on the inside top of the front side of the tach around the ring. Mine is 911 641 301 03.


I cant find a 911 part number. Maybe it is a 3.2l tach. I bought it from someone that told me it was an SC tach.

Will a 3.2 tach work with a 3.0 motor?
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mepstein
post Apr 3 2017, 07:18 PM
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Does it have a shift light. That would identify it as a 3.2 tach.
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mmascari
post Apr 3 2017, 07:28 PM
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QUOTE(mepstein @ Apr 3 2017, 06:18 PM) *

Does it have a shift light. That would identify it as a 3.2 tach.


No, weird huh.


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mepstein
post Apr 3 2017, 07:42 PM
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Look for the part number above the 3 and the 4 under the glass. Then you can figure out exactly what you have.
Edit - It does have an upshift light. That would make it a 3.2 tach
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mmascari
post Apr 3 2017, 08:18 PM
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QUOTE(mepstein @ Apr 3 2017, 06:42 PM) *

Look for the part number above the 3 and the 4 under the glass. Then you can figure out exactly what you have.
It does look like an SC tach to me.


Found it....thanks for pointing it out.....911 641 301 05
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jcd914
post Apr 3 2017, 09:22 PM
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Based on the 8 pin connector on the back of the tach it is a 3.2 DME tach.
Pin 2 would be the tach signal but since it would be coming from the DME control unit I have no idea if it would work with a signal from the MSD unit.
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Mark Henry
post Apr 3 2017, 09:39 PM
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QUOTE(mepstein @ Apr 3 2017, 09:18 PM) *

Does it have a shift light. That would identify it as a 3.2 tach.

What is the up pointing arrow just below the needle center?
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Mark Henry
post Apr 3 2017, 09:44 PM
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If it is a DME tach is it compatible with the MSD?
You could use the Ashlock Tach-Adapt and just use your /4 tach or if you have any issues with that tach.
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jim912928
post Apr 3 2017, 09:44 PM
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Shift indicator light...pretty sure that is a 3.2 tach
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mmascari
post Apr 3 2017, 09:45 PM
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QUOTE(Mark Henry @ Apr 3 2017, 08:39 PM) *

QUOTE(mepstein @ Apr 3 2017, 09:18 PM) *

Does it have a shift light. That would identify it as a 3.2 tach.

What is the up pointing arrow just below the needle center?


LOL...so maybe it is a 3.2 tach. Will it work with a 3.0 motor/MSD
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Jeffs9146
post Apr 3 2017, 11:56 PM
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QUOTE(mmascari @ Apr 3 2017, 08:45 PM) *

QUOTE(Mark Henry @ Apr 3 2017, 08:39 PM) *

QUOTE(mepstein @ Apr 3 2017, 09:18 PM) *

Does it have a shift light. That would identify it as a 3.2 tach.

What is the up pointing arrow just below the needle center?


LOL...so maybe it is a 3.2 tach. Will it work with a 3.0 motor/MSD


I would think it will. Again try it and see if it works!
As long as you do + and - correct you won't mess it up!
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