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Hey i had an aftermarket tach installed but the backlight doesn't come on automatically, everytime i start the car i have to press the button used to change the light color to get the light back on. i dont think this is normal since all the other tachs i have seen comes on automatically. any help would be greatly appreciated.

 
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where are you from that u only have a d15

 
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Trinidad and Tobago. lol we dont even have cruise control. we dont have roads for it.. any thought on d tach issue?

 
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sounds like the illumination might not be wired correctly.

 
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tach isn't JDM enough bro, check JDMland.com

Skipbarber, isn't there just one wire to power the illumination on a tach? If he's getting power, it should be wired correctly. I beleive that it could be a problem within the tach itself. What kinda' tach is it?

 
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its a Type R tach. It had 3 wires. +12v, ground and sensor.

 
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Recheck the wiring but so long as you don't see any problems, it's tach related. If you're getting power occasionaly, it would be a bad ground.

 
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thanks