 Which wires go where?, RPM Gauge...only 2 wires? |
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| jcambo7 |
 May 18 2009, 08:04 PM
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#1
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Senior Member  Group: Members Posts: 1,664 Joined: 24-December 08 From: Graham, WA Member No.: 9,867 Region Association: Pacific Northwest  |
So I am finally trying to figure out why my rpm gauge doesn't work and I discover I can only find two wires...which makes no sense to me because their are 4 places on the back for wires. So I am just wondering if anyone has this gauge in their 914 and if they might know the answer to my wire predicament?
Here is the front  Here is the back  |
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Replies(1 - 6)
| Racer |
May 18 2009, 08:09 PM
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#2
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Senior Member Group: Members Posts: 787 Joined: 25-August 03 From: Northern Virginia Member No.: 1,073 Region Association: MidAtlantic Region |
Unique guage. I've never seen a tach/fuel tank combo before.
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| jcambo7 |
May 18 2009, 08:21 PM
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#3
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Senior Member Group: Members Posts: 1,664 Joined: 24-December 08 From: Graham, WA Member No.: 9,867 Region Association: Pacific Northwest |
QUOTE(Racer @ May 18 2009, 09:09 PM)  Unique guage. I've never seen a tach/fuel tank combo before. If I remember correctly it's a 911 tach gauge. If I am wrong though please correct me. |
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| rudedude |
May 18 2009, 08:25 PM
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#4
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Senior Member Group: Members Posts: 511 Joined: 1-January 05 From: minneapolis, mn Member No.: 3,387 Region Association: Upper MidWest 
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With a date stamp of 3-79?
Early 911's tach connections were +12v,+6v,trigger wire,and ground. Look closer on the plastic. good luck. |
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| detoxcowboy |
May 18 2009, 08:29 PM
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#5
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Senior Member Group: Members Posts: 1,294 Joined: 30-January 08 Member No.: 8,642 Region Association: Africa |
QUOTE(rudedude @ May 18 2009, 07:25 PM) With a date stamp of 3-79? Early 911's tach connections were +12v,+6v,trigger wire,and ground. Look closer on the plastic. good luck. I second the 3 wire hook up, one of the 2 center is ground and the other open.. Also second "read the plastic markings" |
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| jcambo7 |
May 18 2009, 08:48 PM
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#6
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Senior Member Group: Members Posts: 1,664 Joined: 24-December 08 From: Graham, WA Member No.: 9,867 Region Association: Pacific Northwest |
Ok. The writing on the plastic reads this left to right: +12 TD G -...these writings still don't help me in the fact that I only have two wires coming from the dashboard.
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| Larry.Hubby |
May 18 2009, 09:52 PM
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#7
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Member who doesn't post much, but has a long time in 914s Group: Members Posts: 186 Joined: 24-November 04 From: Palo Alto, CA Member No.: 3,172 Region Association: Northern California |
I have a tach just like that in my car. It's a tach from a 930, and the small gauge at the bottom was originally a boost gauge that read either 0-1.5 bar (1977 only) or 0-1 bar (1978 and later). Someone has had North Hollywood Speedometer, or someone with similar skills, re-do the face, and perhaps the movement, of the small gauge to turn it into a gas gauge. The way to hook it up is with the red/white wire going to "+12" (the connection on the original 914 tach that this wire goes to would have been labeled "15"), and with the black/red wire going to the "TD" terminal (on the 914 tach, this would have connected to a terminal labeled "1"). The "G" terminal goes to the small gas gauge movement, and the other connection is a ground. If you want to use the small gas gauge, the green wire that used to go to the gas gauge in the combination instrument should be hooked to the "G" terminal.
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