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Haste Makes Waste (-_-)

 
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K-Roll931  



Joined: 08 Jul 2017
Posts: 76
Location: Southfield, MI

PostPosted: Mon Mar 11, 2019 12:29 pm    Post subject: Haste Makes Waste (-_-) Reply with quote

In my haste to get to setting the timing on my 931, I plugged the wires on the back of my tach wrong/backwards. Even worse, possibly connecting power straight to the ground. And now I've not only got a dead tach (waste), I've got a dead 1980 931 GREEN tach.

Luckily, the wires are fine, I've still got ideal voltage and continuity. But I would rather drive blind than replace it with the regular white gauge face.


Hopefully I've got a replacement lined up tomorrow, or I'm gonna have a helluva time trying to buy an S1 tach and not the whole cluster, or swapping faces with a regular 924 tach.

Don't be like me and try to wire off memory, look at the flow diagram, as frustrating as it can be. Take your time, check as many references as possible, and ask any questions before you proceed.
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'80 931 M471 - Dolomite Gray -> Monaco Blue
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morghen  



Joined: 21 Jan 2005
Posts: 8868
Location: Romania

PostPosted: Mon Mar 11, 2019 5:39 pm    Post subject: Reply with quote

Did you find out whats the right way to connect the wires?
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K-Roll931  



Joined: 08 Jul 2017
Posts: 76
Location: Southfield, MI

PostPosted: Tue Mar 12, 2019 1:16 am    Post subject: Reply with quote

morghen wrote:
Did you find out whats the right way to connect the wires?


Yes I did, and I'll never forget it now.
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Kenodog  



Joined: 25 Jun 2003
Posts: 2645
Location: Vancouver,B.C.

PostPosted: Tue Mar 12, 2019 2:32 am    Post subject: Reply with quote

Damn brother, that sucks.





Lee
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1979 Euro 931, Olive
1981 931, Sabine
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morghen  



Joined: 21 Jan 2005
Posts: 8868
Location: Romania

PostPosted: Tue Mar 12, 2019 4:32 am    Post subject: Reply with quote

K-Roll931 wrote:
morghen wrote:
Did you find out whats the right way to connect the wires?


Yes I did, and I'll never forget it now.


well spit it out ffs, i'm about to re-install my tach and a friend's tach and i cant see the signs on the plastic bit.
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Kenodog  



Joined: 25 Jun 2003
Posts: 2645
Location: Vancouver,B.C.

PostPosted: Tue Mar 12, 2019 4:43 am    Post subject: Reply with quote

morghen wrote:
K-Roll931 wrote:
morghen wrote:
Did you find out whats the right way to connect the wires?


Yes I did, and I'll never forget it now.


well spit it out ffs, i'm about to re-install my tach and a friend's tach and i cant see the signs on the plastic bit.




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1979 Euro 931, Olive
1981 931, Sabine
1991 Ford Ranger XLT 4x4
1996 Ford E-350 ex-FedEx Van
2014 Mazda CX-5 (Kinderwagon)
2019 KTM 790 Adventure
2024 KLX300
2024 KLX140
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K-Roll931  



Joined: 08 Jul 2017
Posts: 76
Location: Southfield, MI

PostPosted: Tue Mar 12, 2019 7:34 am    Post subject: Reply with quote

morghen wrote:
K-Roll931 wrote:
morghen wrote:
Did you find out whats the right way to connect the wires?


Yes I did, and I'll never forget it now.


well spit it out ffs, i'm about to re-install my tach and a friend's tach and i cant see the signs on the plastic bit.


Well heck all ya had to do was ask!

Black goes to 12+, the single green goes to 1, and the brown is ground (-).
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morghen  



Joined: 21 Jan 2005
Posts: 8868
Location: Romania

PostPosted: Tue Mar 12, 2019 6:32 pm    Post subject: Reply with quote

thanks i cant see the plastic markings on mine so i'll just have to take the wiring and position it like you did in the picture, assuming thats the right way
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 2309
Location: Somerset, UK

PostPosted: Tue Mar 12, 2019 6:47 pm    Post subject: Reply with quote

I got a Sharpie and marked my gauge with wire colours before I removed the wires many years ago. Gauge only been out once since and those markings saved me and the gauge
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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924RACR  



Joined: 29 Jul 2001
Posts: 8794
Location: Royal Oak, MI, USA

PostPosted: Tue Mar 12, 2019 9:35 pm    Post subject: Reply with quote

Yes, sharpie is the answer...
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K-Roll931  



Joined: 08 Jul 2017
Posts: 76
Location: Southfield, MI

PostPosted: Mon Mar 25, 2019 2:31 pm    Post subject: Reply with quote

Got my "new" tach earlier this week, wired it properly this time, and was finally able to set ignition timing!! Now I have to fiddle with the fuel mixture....
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