what fuse do you tap when installing manual boost gauge and want to have the light on the gauge only come on when the gauge is on. I don't remember what one I did when I had my triple gauge pod on before the edge. the edge is off on the boost reading is why I added the manual boost

 

if you have an aftermarket radio tap into the orange wire, if not use a test light to find a wire that dims with the roller behind the headlight switch

 

The top of fuse #5.

Dave

 

thanks man. now I know my truck hits 50psi of boost. the edge only read 42 max on the attitude.

 

Never checked my attitude to see how high it goes, but I run an Isspro 100 pounder up a ways!

Dave

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Also, just for the sake of conversation, the stock MAP sensor will read close to 60#. I know that does not mean the ECM will read or use all that, but the sensor itself will go that high.

This was tested with a regulated power supply and a good regulator behind a liquid filled gauge.

Dave

 

the edge is off by 7psi the whole way. my edge reads 5 and the autometer reads 12. so it's just off by the computer to the edge. or maybe a dirty map sensor?