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Old 03-24-2010, 07:49:52 PM   #1
Adans_1970
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1970 camaro stock gauge cluster wiring harness.

So I decided to change my gauge cluster with "idiot lights" to one with gauges, I followed the instructions that I found on this website, but nothing works on the new cluster, now I'm trying to figure out what my stock wires do or what they're for. Yes I know I should've written them down before starting, but I'm new at this so "rookie mistake" guys sorry, any help would be much appreciated, also how could I test the tachometer to see if it works at all by itself. Thanks.
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Old 03-24-2010, 09:28:39 PM   #2
70RS_L48
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Never played with the idiot light cluster...

But to the best of my understanding, the wiring harness is the same regardless of whether you have idiot lights, or gauges. The thing that is different is the flexible printed circuit on the back of the cluster. Take a look at National Parts Depot's online Camaro catalog, page 15, part#C-9744-4A:

http://npd.dirxion.com/WebProject.as...Code=car09flx#

That is the correct printed circuit board, and should work if you have a correct U14 gauge package.

You should not have to cut a single wire.
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Old 03-24-2010, 10:09:01 PM   #3
Steve's 74
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pin layout for the idiot light cluster pin layout for the guage cluster;
Pin 1 - Pink (12v) Pin 1 - Tach Trigger (needs new wire and pin)
Pin 2 - Light Brown (fuel guage) Pin 2 - Green (temp guage)
Pin 3 - Dark Blue & White stripe (Oil lamp) Pin 3 - Pink (12v)
Pin 4 - Brown (Generator lamp) Pin 4 - Light Brown (fuel guage)
Pin 5 - White (gauges?ground?) Pin 5 - White (gauges?ground?)
Pin 6 - Black (ground) Pin 6 - Black (ground)
Pin 7 - Light Brown (brake lamp) Pin 7 - Light Brown (brake lamp)
Pin 8 - Pink & Red (2 wires, brake lamp) Pin 8 - Pink & Red (2 wires brake lamp)
Pin 9 - Light Blue (left turn) Pin 9 - Light Blue (left turn)
Pin 10 - Light Green (high beam) Pin 10 - Light Green (high beam)
Pin 11 - Dark Blue (right turn) Pin 11 - Dark Blue (right turn)
Pin 12 - Dark Green (temp lamp) Pin 12 - Dark Blue & White stripe
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Last edited by Steve's 74 : 03-25-2010 at 08:17:34 PM.
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Old 03-24-2010, 10:15:35 PM   #4
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To do the swap you do the following;
old Pin 4 (brown) must be released from the connector and left out
old Pin 2 (light brown) moves to Pin 4
old Pin 12 (dark green) moves to Pin 2
old Pin 3 (dark blue/white) moves to Pin 12
old Pin 1 (pink) moves to Pin 3
tach goes into pin 1

voltmeter has it's own spade plug connection, run lead to the IGN terminal of the fuse box which supplies power only when the
key is in the on position.
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Last edited by Steve's 74 : 03-24-2010 at 10:20:35 PM.
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Old 03-25-2010, 03:01:08 PM   #5
Adans_1970
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Thanks Steve, I did the wire swaps and everything that has to have power has it, still no response from the gauges themselves. My printed circuit board looks jacked up, so I just ordered a new one. I hope that will be the end of it (fingers crossed) and my gauges come alive. Again, thanks for the help guys.
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Old 03-25-2010, 06:40:18 PM   #7
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So here's the update, I carefully re-connected my harness and everything worked, except my tach (what a bummer) which obviously means bad tach right? I only paid $60 for the cluster so I can't complain. Once I fix the tach my dash will look awesome. I appreciate all of the help gentlemen!
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Old 03-25-2010, 07:41:20 PM   #8
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looks to me the pink wire and black are wrong ,black is grd. and pink is hot,,,maybe
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Old 03-25-2010, 08:13:45 PM   #9
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Quote:
Originally Posted by hogg
looks to me the pink wire and black are wrong ,black is grd. and pink is hot,,,maybe
yea, duh. fixed
and I think the white (maybe its light gray) is ground for gauges?
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Old 03-25-2010, 09:51:24 PM   #10
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Ummm, so what do I do?
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Old 03-26-2010, 01:17:32 AM   #11
70RS_L48
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Scanned the 1970 wiring diagrams for you...

The 1970 diagrams do not differentiate between 'Gauges' and 'No Gauges', but the 1974 diagrams do... so we might be mixing things up here.

Here are four LARGE images of the 1970 wiring diagrams:

http://img706.imageshack.us/img706/4...ngdiagram1.jpg

http://img704.imageshack.us/img704/6...ngdiagram2.jpg

http://img36.imageshack.us/img36/989...ngdiagram3.jpg

http://img24.imageshack.us/img24/322...ngdiagram4.jpg

Look on page three (third link) where it says 'Printed Circuit Conn.' That's what hooks into the 1970 gauges. Confirm that your wiring harness matches the colors on these wiring diagrams before you cut anything.

Follow the wires through the diagram and confirm that your car has all the connections/senders shown on the diagrams. Spend some time. It may save you from cutting up a functioning wire harness.

Keep in mind that the connector shapes on these old diagrams are accurate to what you'll see in the car, and are mirrored from page to page, not superimposed. Look at the asymmetric connectors going between pages 2 and 3 and you'll see what I mean.

Let us know what you find out.
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Old 03-26-2010, 01:41:26 AM   #12
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Will do, I should be back and digging in the dash by noon tomorrow, so I hope to have an answer for you by the evening, the diagram will surely help a lot. Thanks guys
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