installing gauges, need help/advice wiring oil temp and pressure gauges |
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installing gauges, need help/advice wiring oil temp and pressure gauges |
914 RZ-1 |
Jul 15 2016, 02:56 PM
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#1
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Porsche Padawan Group: Members Posts: 683 Joined: 17-December 14 From: Santa Clarita, CA Member No.: 18,230 Region Association: Southern California |
I got oil pressure and oil temp gauges. The instructions are generic and I'd like some specifics about how to install them on my 1.7L '72. Sorry if these seem obvious; I've never done this before.
1. Standard ground or floating ground? I'm leaning toward floating because it looks obvious how to attach the ground. On the standard ground, how do I attach the gnd wires? 2. What do I attach the wire from the gauge light socket to the light switch to? The headlight switch? Which connector? 3. Which fuse do I use for power? #9? 4. I figure I will just attach grounds to a screw on the body, either an existing one or a new one. 5. What is the "switched +12v" light shown in the instructions? The dummy light? 6. Does the oil pressure sensor get installed where the current oil pressure switch is by the distributor? Doesn't appear to be any room, but I'll need to move some hoses, etc out of the way. 7. Where does the oil temp sensor go? The instructions state that it can replace the drain plug. Is this correct? 8. Where is the best route for the wires? I was thinking thru the middle along where the other wiring harness is located. What should I do with them in the engine compartment: zip tie them to other wires, or let them hang free, or what? If anyone has done this and has pictures or a more detailed description, I'd appreciate it. Attached thumbnail(s) |
914 RZ-1 |
Sep 18 2016, 10:54 AM
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#2
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Porsche Padawan Group: Members Posts: 683 Joined: 17-December 14 From: Santa Clarita, CA Member No.: 18,230 Region Association: Southern California |
I got the gauges to work!
I'm getting readings of about 220 F on the temp (running at 3-4K RPM on mixed roads-up, down, straight, etc) and about 50 psi on the pressure (at 3-4K RPM). It goes down a bit when the temp is higher and at idle. The instructions that came with them are not entirely correct. Here's my wiring diagram: Attached thumbnail(s) |
advman89 |
May 17 2022, 08:53 PM
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#3
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Member Group: Members Posts: 120 Joined: 8-July 19 From: Chicago, IL Member No.: 23,286 Region Association: Upper MidWest |
I have everything operating..except the pressure gauge pegs to the right every time. I've tried several grounds:
1-gauge grounded under the dash (to the bolt holding the climate control unit). 2-I've tried several scenerios to ground the sender: it's mounted to the location on the fan housing using a metal capacitor bracket....that should do it! I've tried running a wire to the primary ground next to the battery to the sender housing (and tried the oil line bolt. The other night on one of my shake down laps, when the car was warmed up, when I would come to a stop-the OIL light came on. As soon as I started rolling, it went off. Was slightly dimmed at one point. Checked the oil...she's full. I didn't need to run a ground wire from the sender to the gauge, did I? Stumped! I got the gauges to work! I'm getting readings of about 220 F on the temp (running at 3-4K RPM on mixed roads-up, down, straight, etc) and about 50 psi on the pressure (at 3-4K RPM). It goes down a bit when the temp is higher and at idle. The instructions that came with them are not entirely correct. Here's my wiring diagram: |
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