Evan G Posted July 1, 2009 Report Share Posted July 1, 2009 (edited) I recently bought a 5 inch autometer monster tacho from a workmate, I installed a couple days ago and found a problem with the shift light, as soon as I hit set (4000 rpm) the needle flicks up to (7000rpm) till rpm below set is reduced I thought I soldered the wires for the shift light backwards, I swap the wires around and still the same. I opened the tacho up a while ago to paint it and found 3 wires just hanging in there? but they had eletrical tape on em? maybe there earthing on the casing???? any thoughts or comments will be greatly appreciated Evan Edited July 1, 2009 by Evan G Quote Link to comment Share on other sites More sharing options...
Taz_Rx Posted July 2, 2009 Report Share Posted July 2, 2009 Not too sure what your problem is but thought I might add something that could help when trying to fix it. When I was using one of these to trigger my "Home made rev limiter for carby cars" I discoverd the shift lights are pull to groud, not powered trigger. This means the light always has power connected to it, and the tacho earths it out to make it work. Simple thing but can make a bit of difference with wiring. :wink: Quote Link to comment Share on other sites More sharing options...
Evan G Posted July 2, 2009 Author Report Share Posted July 2, 2009 Not too sure what your problem is but thought I might add something that could help when trying to fix it.When I was using one of these to trigger my "Home made rev limiter for carby cars" I discoverd the shift lights are pull to groud, not powered trigger. This means the light always has power connected to it, and the tacho earths it out to make it work. Simple thing but can make a bit of difference with wiring. :y: ahk i getcha, thats the problem i wanted to make the rev limiter like u posted but the f@$king shift light doesnt work :wink: Quote Link to comment Share on other sites More sharing options...
datnut Posted July 3, 2009 Report Share Posted July 3, 2009 The 3 cut wires are normal. When they're new you cut certain wires to tell the tach how many cylinders you're running. Quote Link to comment Share on other sites More sharing options...
ke30rolla!! Posted July 3, 2009 Report Share Posted July 3, 2009 question for ya's what do you wire the shift light up to?? is it iust a power and earth supply?? cheers :wink: Quote Link to comment Share on other sites More sharing options...
Evan G Posted July 3, 2009 Author Report Share Posted July 3, 2009 question for ya's what do you wire the shift light up to?? is it iust a power and earth supply?? cheers :sob: yea theres 2 thick black wires for the shift light, yes power and earth Quote Link to comment Share on other sites More sharing options...
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