Oil Pressure guage wiring-1982

[skykng]

'82 Spyder 2000: does anyone have the wiring diagram for the oil pressure sensor and guage installed on later models (Pininfarinas) of the car? I am trying to have the idiot light and a guage at the same time (replacing the clock). I have the guage and the sensor and the dual tap at the filter housing, but how is the wiring of the guage to the sensor done? Idiot light is operational with its own switch. Thanks. Steve

[paintdudeluke]

I just went with an aftermarket mechanical gauge that looks nearly identical to the fiat gauges. Under $25 at oreileys. Equus gauge. Looks great and has no electrical other than the dash light.

[vandor]

You have to run a wire from the sender to the gauge. All other wires (ground, power, illumination) can be tapped from the other gauges. If you look at the back of the gauge and the colors of the wires as compared to the other gauges it's obvious what is what. Worst case you can look at wiring diagrams, there are some good ones on http://www.artigue.com

[azruss]

There is what i did was put an old style tach and oil pressure gage into a 80 FI harness. I didnt shrink the drawing for clarity. right click on it and open it in a new tab to see the whole thing. Dont know if this will help

[skykng]

Great help - thanks guys: Luke, Vandor and Russ -- Maybe I should have used the aftermarket guage, but I was afraid it wouldn't match the others. I bought a used guage and a new guage sensor. The used guage came with the 4 wires and plug disconnected from the guage. The diagram you made Russ came out well and tells me what wires go where, but I only have 4 wires: blk/yel 12vdc, white to lighting bulb, and black/white and green. I'm guessing the black/white is the ground from the low pressure switch to the warning light bulb in the guage and the green I have is the gray/black to the actual guage in your diagram. My low pressure warning light is wired by the separate circuit that came with the car -- I won't use the low press warning light in the guage.

I think I have it OK -- will compare it to the other guages as Vandor suggests when I get around to installing this thing.
All I could find at Artigue's excellent diagrams was the low press light wiring. Thanks very much again for the help...................greatly appreciated.
best, steve

[skykng]

OK- Oil Pressure guage is in the dash replacing the clock and works like a champ. Really great to have it and it wasn't that difficult at all. Car on ramps, removed oil filter, and replaced the bad oil pressure switch for the idiot light (22mm) with the adapter that allows both the OP switch for the light and another female tap for the oil pressure sensor for the guage.
Ran a wire from the filter position thru the firewall to the clock hole +8 inches in length. Spade lug female added for connection to green wire from the guage that comes with a four wire plastic connector with male spade lugs.

The four wires with the guage are:

green to sensor
blk/wht to ground
white to dash lights 12vdc
blk/yel to ignition switched 12 vdc

The empty clock plug sitting there has the ground so I just wired a short piece of black wire with a female spade and a male on the other end. It connected right into the ground wire for the clock plug. I ran a new red wire from the guage to fuse #2 (12vdc switched) and joined it to the spade lug at the fuse. For the dash lights, I ran a white wire to fuse #8 and joined it the same way to the wire there. I joined them by cutting off the fiat lug, stripping the existing wire 3/8 inch and winding the two wires together. Then I inserted the two wires wrapped together into a new yellow female spade lug crimped for reconnecting to the fuse panel male.

I did not use the idiot light built into the guage.....I kept the idiot light in the tachometer active because it is directly in my straight ahead view. The guage is a great complement to the dash and provides a backup actual oil pressure. I ignored the clock that didn't work anyway, so I removed it. More better now.

Thanks to you guys for the advice and help. It took me a couple of hours. You might want to consider doing it if you don't mind hurting the "originality." Sure looks original............best, steve

[bradartigue]

I like the setup replacing the clock; being that the clock is generally worthless (even when new they didn't keep time correctly, and they drain the battery when old). You can also wire the idiot light grounds together so both work; the pressure drop sender is just a ground and will ground both of them.

[skykng]

Roger that, Brad. Thanks. Terrific website you have put together and thank you for that!!
best,