A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

APR boost guage

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Old Oct 30, 2006 | 12:58 PM
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Default APR boost guage

Just installed boost guage from apr. There's no instructions on the best way to power up the back lit display. Any thought?
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Old Oct 30, 2006 | 01:01 PM
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The X75 relay under the driver side knee bolster.
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Old Oct 30, 2006 | 01:11 PM
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and which one would that be...
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Old Oct 30, 2006 | 01:14 PM
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Default one of the ones under the drivers side knee bolster. hint: it's on the left side.

search for x75 and there should be pics some where in the archive.
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Old Oct 30, 2006 | 01:34 PM
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install directions on their website
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Old Oct 30, 2006 | 01:38 PM
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the one labled X75.
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Old Oct 30, 2006 | 01:45 PM
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Default Re: one of the ones under the drivers side knee bolster. hint: it's on the left side.

okay so the boost guage was a common sense diy but as for the lighting I am seriously electrically challenged how do you go about tapping into the relay?
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Old Oct 30, 2006 | 02:19 PM
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Default run a wire from the x75 to the boost gauge, it's that easy.

disconnect the battery first. Hopefully you have the radio code.

then iirc put one of these terminals on the end of the wire going to the boost gauge.
<img src="http://www.bfyobsoleteparts.com/volkswagen/files/master/thumbs/t_1713.jpg">

put one of these on the end of the wire going to the x75.
<img src="http://images.orgill.com/200x200/6548465.jpg">

make two of these, one for the ground and one for power.
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Old Oct 30, 2006 | 06:24 PM
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done...route one to x75 ground the other thanx...
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