aftermarket tach install on rb?

[drftnrps13]

try to install my autometer tach in with my rb26 swap. i got the autometer tach adapter. now i just need to know what wire am i suppose to tap into for my signal? on the coil the wires are labled with (-) (+) (s) anyone help

[s13point5]

"S" means signal

[S13 240SX]

noooo!!! u dont touch the coils/coil wiring.

you wire the aftermarket tach signal wire to the ecu pin 7 for tach signal its yellow/red.

[HOMEMADE240SXTURBO]

noooo!!! u dont touch the coils/coil wiring.

you wire the aftermarket tach signal wire to the ecu pin 7 for tach signal its yellow/red.

x2

[drftnrps13]

so i dont need the tach adapter anyways? but i thought if u had ind. coils u need the tach adapter! ok ill try that then!

[S13 240SX]

so i dont need the tach adapter anyways? but i thought if u had ind. coils u need the tach adapter! ok ill try that then!

nooo what the piss is a tach adapter.. i dont have one my tach works fine whenever my engine starts

so if i dont have one then u dont need one. use ecu pin 7 to rev signal hook up to the new tach slice the wire in

or look around your harness and look for something like this it'll have a yellow/red wire going to, pull the black cap off and run the new tach wire this. it's fine and i'll work thats on my harness and i ended up finding out and follow it to ecu pin 7

[drftnrps13]

ok im gonna try it. my motor is a rb26 so is there a diffrence between the other rbs? so just tap into the tach signal wire? that easy! i just spent $90 on this tach adapter and if i dont need it im gonna be pissed!

[S13 240SX]

yeah it should be the same get an rb26 ecu pinout and i dont know i never herd of a tah apdater maybe somebody else can let u know about it.

[drftnrps13]

ok i just tampd into pin 7 yellow/red and well guess what? nothing my tach still doesnt work. just to make sure im doin this right- take the tach signal wire and just splice it to pin 7 tach signal wire(yellow/red) and it should work right? mine doesnt and its a new tach from autometer? wtf?? help

[S13 240SX]

then u didn't hook the tach ground and power wire up.

[drftnrps13]

nope! fixed it! im such a noob! lookd at diagram wrong and spliced wrong wire!! someone kill me please!! mods lock please!!

thanks all who helped!!

[element26]

hey i have the same problem as you and i was looking up how other ppl installed there tach on a 26 and i came across this tread...i tried wiring it to th #7 pin(red& blue) and it didnt work..bought that adapter and tried that and it still wont work....before tho my stock tach worked but its still calibrated for a 4 cyl...now that one doesnt work either...did you end up using the adapter....did you splice into the #7 wire or just cut and butt connect them???? please help....thanks in advance...