Tach LED not working

frank grivjack

.020 Over
Joined
Jun 6, 2015
Messages
18
Ride
rocket3, harley electra glide ultra limited
Can anyone help me with the proper way to diagnose the neutral LED in the tach on a 2007 R3 standard. It is out and the dealer suggests a new tach at 450.00. I checked the B/W wire in the connector at the tach and it shows 0 voltage in neutral and 3.5 volts when it is in gear. The gear indicator switch would be a lot cheaper to buy than the tach. Any guidance would be greatly be appreciated.
 
Yes, I have the manual but I don't quite understand if should read voltage at the tach or if the gear indicator breaks ground to turn the Neutral LED on.


TO rocket said:
Do you have a manual? If not you can download one here. Just look for any post from IDK and the link is in his signature.[/QUOTE
Click to expand...
 
does the engine turn over w/o the neutral light?
like warp said it is probably (clean the gear switch). i would think that you could determine which terminal is used for neutral by having the bike in neutral and looking at the switch. then ground that terminal to see if neutral light comes on.
 
frank grivjack said:
Yes, I have the manual but I don't quite understand if should read voltage at the tach or if the gear indicator breaks ground to turn the Neutral LED on.
Click to expand...


i believe the the gear switch grounds the b/w wire to turn on the neutral switch.
for test purpose you could probe and ground to see what happens.
 
TURBO200R4 said:
i believe the the gear switch grounds the b/w wire to turn on the neutral switch.
for test purpose you could probe and ground to see what happens.
Click to expand...


You are correct , the b/w wire and the switch checkout good, so the only conclusion is that the tach is the problem. Thanks for the help!
 
If you do have to replace a tacho at $450, I would suggest getting something like a Dakota Digital system instead. It would cost about the same, but give you a lot more. There are instructions around somewhere on the site for installation.
 
Hell if it's just the "N" led - fit an extra LED somewhere and move some wires. I'm sure Ecosse can assist!.
 
gopro cheap and it tells you all of the gears.
 
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