R34 standard boost gauge reading voltage

[Nickoc7]

Been trying to work this out all weekend I'm all out of ideas 

Re wiring old triple gauge back into my r34 gtt 

Have everything working except the boost gauge which comes on with accessories and basically reads voltage I have it wired to the middle wire on boost sensor 

Any suggestions would be awesome ?

[89CAL]

It will be a short accross the wiring i would say. The boost gauge reads by sending power to a sensor, getting a signal back (in a voltage) and the third wire is ground

 

If you think about it like this, most 3 wire sensors share the same principal, 5v in, 'x'v out and 5v - 'x'v to ground

 

So it sounds like either you have picked a wrong wire somewhere or there is a short from the 5v to the signal wire. So the gauge will always be reading max

 

Have you got a multimeter? Check the voltage going to the gauge (i will assume its 5v or 12v depending on what voltage it uses) now work back to the sensor and see if it has 5v out. You can also unplug the sensor and test to see if it is the sensor plaing up (e.g. if you get 5v out of the signal wire with the sensor plugged in and 0v with it unplugged it may indicate a sensor fault)

Check all the wires and see if what they are reading makes sense