This may be moved to another section if needed. Anyways, I got a '07 Low Rider. I got this type mainly because it was the only FX model with a tach. I live by a tach. But, I'm noticing that I have to take my eyes off the road to look down at the tach. Not safe. I do have an aftermarket tach on my shovel (on the handlebars) that I'd like to use.
Here's the electrical picture: on the handlebar mount there are 4 wires.
1) red wire to ignition 2) blue to lamp 3) black to ground and 4) green to neg of the coil.
I was looking at the hook-up to the low rider's tach :Ignition is orange (would match the red wire) Battery is BN/GV...I don't think I'd use that one Accessory is O/W (would match the blue wire) BK is ground..no problem. Now, the only other connection in the Low Rider's tach is the LGN/V DATALINK. I looked at the Low Riders coil..no negative.
My question is would I hook up the aftermarket tach's green to the datalink wire for the signal??? I don't want to 'cook' anything.
If this works, if anyone on the forum wants a working tach, I'd sell it pretty cheap. I'd like to find a cover for the center console to cover the chrome and hole that would be there. I could just leave the tach there, but that would be pretty cheesy
Any ideas out there??

 

gee, no one replied to my post. After doing more searching, and spending some time with the bike and manual, I got the other tach to work. I ended up getting my tach signal off #3 of the ECM which had a red plug in it. I just wired the other wires from the tach into the existing wires on the factory tach which I cut, didn't need 2 tachs. Still baffled where the factory tach got it's signal, since all it's wires were common with the speedo.
Well, like I said, the aftermarket handlebar tach works just fine. Now, what's my next project ???