Aeroforce oil pressure kit install problems

[mrspeedy69]

I decided to install my Aeroforce Oil Pressure kit today. I wired everything just like this pic below ( I stole from another member on here) except I went to analog 1 on the green wire. I used the resistor and entered the slope value of 37.2 and the intercept value of -18.4 based off the instructions and since I'm using the resistor.

I then did an add a circuit to the red wire coming off the 5v regulator with a 2 amp fuse in it. I then plugged that into fuse 20 which is suppose to be the convertible top, I have a coupe so it should be unused. When I turned the ignition on my oil psi said 165psi and when I started it, it did not change. When the key is turned off the value changed to -18.4. So I tried a different fuse, number 21 I thought was the instrument cluster and got the same results.

Am I missing something or did I do something wrong?

 

[Blueline]

The red and green are not used, unless you are powering up the gauge with a switched power source and not the OBD cable. The green unused one would be for an anlog 2 input, another add on kit.

Unless I am missing something it looks like you have it wired correctly. Did you start the car?

 

[DSG2003Mach1]

Are the two black wires connected to a ground or just each other?

 

[mrspeedy69]

The red and green are not used, unless you are powering up the gauge with a switched power source and not the OBD cable. The green unused one would be for an anlog 2 input, another add on kit.

Unless I am missing something it looks like you have it wired correctly. Did you start the car?

Ignore the picture asking about the other 2 wires off the gauge connection. This was someone else's drawing. I thought green was analog 1 and white was analog 2. And yes I did start the car and the reading stayed at 165PSI.

The 2 black wires are just connected together. It gets its ground through the OBD connection from other posts I've read.

 

[Blueline]

Those two black wires need to go to a ground, thats your problem.

 

[Bdubbs]

Those two black wires need to go to a ground, thats your problem.

+1, if memory serves me right I put those two black wires to a ground. I can go out and double check.

 

[DSG2003Mach1]

the black wires need to go to a ground, I believe the same ground ideally

 

[mrspeedy69]

Those two black wires need to go to a ground, thats your problem.

You're right thank you so much. I'm just an idiot and thought it was grounded through the OBD connector. Appreciate the help everyone.

 

[DSG2003Mach1]

You're right thank you so much. I'm just an idiot and thought it was grounded through the OBD connector. Appreciate the help everyone.

shit happens... the only connection the sensor add-ons have to the gauge is wire sending the 0-5 volt signal so theres really not any way the gauge can provide a ground to the add-on sensor kits

 

[mrspeedy69]

Yeah that makes since. I'm horrible at wiring, probably the reason I leaned more towards the Interceptor gauges in the first place. At least I'll know from now on when I add more things. Thanks again.