Question about 2003 Harley Davidson FLHR Road king

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How do you take the wiring off for a tach on a 2003 harley roadking

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How much wiring and just from the tach or off into the harnesses?

Posted on Nov 16, 2014


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Posted on Jan 02, 2017

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SOURCE: Trying to install a harley davidson tach on 2007

The pink wire goes to the pink eng rpm signal wire coming from the ecm. Go to the stealership and ask 'em to show you where it is.


Posted on May 01, 2009

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SOURCE: picture wiring diagram for 2003 harley fatboy

May I suggest a trip to your local library. Cycle repair books should be in 646 stacks of reference.
Otherwise you can Google for 2003 Clymer Service manuals on the internet.
I think Clymer had electrical diagrams in their books. I doubt that any except the HD service book would have anything about the physical location of the harness, but the pictures in the other books would help you.

Posted on Oct 11, 2009

  • 63 Answers

SOURCE: hooking up a tach on a 89 harley sportster 883,

Most aftermarket tachometers will employ a 3 wire system. A "power" wire, a "signal" wire and a "ground" wire. On a stock Sportster's ignition coil there will be 2 terminals/posts. 1 post will have a set of white wire on it the other a blue or pink wire. White is switched 12VDC (vehicle power) and the blue/pink is the secondary side of the coil (signal). I'd really need more information to be most helpful.

Posted on Aug 09, 2010

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2003 soft tail 4 wire plug to coil. yellow /green stripe, purple/blue stripe, yellow / black stripe, and blue / red stripe. which wire is negative . signal to tach.?

Hi, David none of the above your bike did not come with a tach if you are trying to install a Harley combination speedo/tach accessory then there are installation instructions you can download along with most aftermarket tachs also for this scenario you will need your service/owners manual if you can not find the first and best tool you ever bought for your Harley, despair not, for a mere $5 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below and for more specific information or questions at no charge please feel free to contact me at Good luck and have a nice day.
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1 Answer

Rear fender off 2000 roadking fit a 2003 roadking

Hi Anonymous, my guess is probably with minor modifications if any maybe. The 03 fender would fit a 01 and 02. The 2000 would fit a 99 Good luck

Btw, I’m available to help over the phone in case u need at

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Hi HMSroadtach, for more information about your question please visit the website below. Good luck and have nice day.

Btw, I’m available to help over the phone in case u need at

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Hi Anonymous, for a free wiring diagram please visit the website below and good luck.
Harley Davidson Wiring Diagrams and Schematics

Btw, I’m available to help over the phone in case u need at

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Hi Anonymous, for more information about your question please visit the websites below. Good luck and have nice day.
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2 Answers

Whats the voltage on a 2003 roadking battery

Hi and welcome to fixya,

The voltage on a 2003 roadking battery is 12volts nominal. 13.8 volts DC on charge. 10 amps.

Hope this info helps

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