View Full Version : Wiring an Autometer Tach on 12a????

Speed Raycer
02-25-2002, 03:49 PM
How the heck did you guys wire in your tachs?

We're trying to figure it out on our first Gen RX7 and are getting nowhere. We've got a 10,000 rpm Monster tach with peak recall if that makes any difference.


02-25-2002, 03:56 PM
I think you go to the trailing coil for the reading. I know you cut the wires to make the tach read like a 4cyl. put a fuse in line with the power, just in case. rather blow a $.10 fuse than a $100. tach

IT7 #88
PowerTrip Racing

02-25-2002, 03:59 PM
green wire to trailing coil negative side
red to power
white to interior/tail light power
black to ground
cut both loops (4 cylinder setting)

Daryl Brightwell
ITA Mazda #90

[This message has been edited by 7'sRracing (edited February 25, 2002).]

Speed Raycer
02-25-2002, 08:39 PM
Thanks guys! That helps a bunch! Good idea Chris. The line is already fused but I may put a smaller fuse inline just to be on the safe side.

It's not what you build... it's how you build it
http://home.swbell.net/srhea66/AllThreeProjectsRealSmall.jpg (http://www.angelfire.com/mo2/radrodder)

PFM Racing (http://www.angelfire.com/mo3/rudder_racing)

[This message has been edited by Speed Raycer (edited February 26, 2002).]