Tach Problems PLEASE HELP

Energy One
Hi! I JUST bought a super clean '07 k-9. The only thing wrong with it, is that the tach section of the guage isn't lighting up AT ALL. I tried to check it out a little by chasing the wiring but don't see where they are picking up the signal from. Is it the guage that is bad? Or is it a "no signal" situation, or something I am not thinking of???? Thanks
 

woodbutcher

Mr. Old Fart member #145
Staff member
could be broke circuit board in the tach, could be sending unit, could be chaffed wire, could be broke wire in the housing, could be a lot of things.
 
Thanks Fellas. Would y'all happen to know off hand where on the engine that they pick up the signal from? Would it be straight off the coil, or off of some other ign. control module or something?
 

bruce

Active Member
I know 2006 K9 had same problem, and it was in the circle were the tac lights are - they get water in and rust at bottom of ring ( bad connection), have to take speedo apart and that ring come out and can be replaced or maybe cleaned up, bigdog replaced mine at Myrtle beach several years ago. do not no if 07 had same problem.
 

chacha

Chaff Your EHC!!
Calendar Participant
Are you getting power to the oil/highbeam/turnsignal LEDS? If so then you have power to the board.

Speedo working fine? then the connector under the tank MAY be OK. Recommend starting at the tach board in the speedo housing and working backwards...plenty of threads on the forum to get you though that part.

Good luck!
 

BigDogBro1

Made in the USA
This may help.

If your engine runs, the sensor is fine. Tach signal comes from the ignition box.

Check tach (annunciator board) power, ground and signal wires continuity with an ohm meter.



Let us know.
 
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Mastiff 08

New Member
Hi have a big dog mastiff it a 08. Have truble with the speedometer. It dose not. Work right. Replace the speedometer and checked all wires. Center good but got new one still not work. If any as any ideals please let me know ... Thanks
 

knothead

Second Chance Customs
Hi have a big dog mastiff it a 08. Have truble with the speedometer. It dose not. Work right. Replace the speedometer and checked all wires. Center good but got new one still not work. If any as any ideals please let me know ... Thanks
Sounds like it if you replaced your speedometer and it doesn't work and you say your wires are good then sounds like speed sensor in your transmission is bad or dirty....
 

Mastiff 08

New Member
I tested the speed sensor it reading right by the voltage meter. I order a new one any way. Thanks was see if there something i was missing this my first Big dog usually have HD's
 

knothead

Second Chance Customs
I tested the speed sensor it reading right by the voltage meter. I order a new one any way. Thanks was see if there something i was missing this my first Big dog usually have HD's
May have to recalibrate your speedo....there is a recalibrate procedure on here somewhere for it
 

Mastiff 08

New Member
Thank all for the help yes it a Dakota Digital . i put a new speed sensor. I going recalibrate it . thanks hope this works
 
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