JEGS Tachometer reading 1/2 rpm speed

[4BangerDangerRanger]

Yes I’ve done all of this down to the atom. So I should set up a return?

 

[RonD]

Yes, its either faulty or not compatible with your system

For next one only hook up tach signal wire, the ground wire and the key on 12v wire
Then test it

Back lights can be hooked up later
12v full time is just to hold memory options, so key on, set calibration and start engine
If you turn the key off again you will most likely have to re-calibrate each time until 12v full time wire is connected

 

[4BangerDangerRanger]

Yeah I get that, when I take this one out I’m just going to pull the wires out of the dash and cut my connections and label them, then I can test my next one I get, does anyone have any recommendations?

 

[4BangerDangerRanger]

In my experience, on most vehicles moving down the road at highway speeds in a top (overdrive) gear, you will get about 25 mph for every 1,000 rpm. This means 60 mph in top gear would be about 2,500 rpm. See if your tach reads anywhere close to 2,500 rpm at that speed in top gear.

If your engine is turning over 5,000 rpm at 60 mph, you've got a real problem.

60mph in 5th it’s reading 1000