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Auto Meter , Direct Fit Tach/Speedo(19466)

Auto Meter , Direct Fit Tach/Speedo(19466)

Posted by Clayton Pace on 20th Aug 2018

The Auto Meter 19466 claims to be a Direct Fit Tach/Speedo or Drop-In Gauge for the Harley Davidson Dyna Wide Glide and Road King, 1995-2003, and Softail (except Deuce), 1996-2003.

Upon opening the package you'll notice the new gauge combo to be quite aesthetically pleasing, but as soon as it's flipped over the idea of 'direct fit' goes right out the window.

Out of the box it comes with connectors, zip-ties, heat shrink, an aluminum hold-down bracket and knurled hand-tightening nuts. The wiring diagram and instructions included are seriously something to be left desired. They can be confusing and in the case of the wiring diagram, incomplete.

After searching the web, I noticed that over the years many people had had a lot of the same questions and concerns but with no discernable answers to the problems at hand. Hopefully, this write-up will shed some light on the issues and help you decide if the Auto Meter 19466 is right for your machine. For this instructional, we will be installing this tach/speedo on a 1999 Dyna Wide Glide.

Speed Sensor Testing

The instructions state that some late model Harley Davidson's make use of a 5-volt sender and that applying 12-volts can damage them. They suggest that you contact Harley Davidson themselves to find out whether or not your particular motorcycle utilizes this type of speed sensor. I prefer a much simpler method by using your trusty voltmeter.

Remove the triangle connector of the speed sensor, located below the starter on the top of the transmission. Place your red lead to the Red wire, and the black lead to good chassis ground. Set your meter to read DC Volts and with the ignition switch in the on position, you should get somewhere around a 12-volt reading. In the event you do have a 5-volt sensor you'll need to add a 5-volt reducer inline before connecting it to the 12-volt power source. In our case the sensor is 12-volts.

Another method to measure is to back-probe either the connector at the sensor itself or the connector on the existing speedometer. When utilizing this method, you'll need something like the Tool Aid SG Back Probe Kit and some dielectric grease to coat the probe before inserting it into the back of the connector. The dielectric grease helps lubricate the pin of the probe, but more importantly to ensure a good seal of the water-sealed connector after removing the probe.

Tach/Speedo Installation

To remove the old speedometer from the dash housing, apply slight pressure to the three tabs of the plastic outer ring with a flat blade screwdriver and remove it. Remove the old speedometer from the top of the dash housing.

Retain the rubber sealing ring because you will need it for the new tach/speedo. Slide the new tach/speedo into the hole and center it. Flip it over an install the supplied aluminum bracket over the studs with the L-Shaped legs of the bracket oriented down into the dash housing. Tighten down with supplied knurled hand-tightening nuts. Hand-tight is all you need.

Wiring Colors and Diagram

The included instructions accurately outline the colors of the wiring for your specific year minus one, the black wire with a yellow stripe (BK/Y), which may come as an annoyance to some and not at all to others. The BK/Y wire is for the check engine light, and the Auto Meter 19466 does not have a terminal nor an LED for it. In our case, we capped this wire off and went about our day. If the check engine light is something you would like to have then this tach/speedo may not be right for you.

The diagram itself can be a little confusing, and it seems that it's missing some information. The installation kit comes with two male double terminal connectors which we utilized for connecting the black wires of the Speed Sensor ground and Battery (-) to the GND terminal, and the (O/W) +12v and (R) Speed Sensor (+) to the +12v terminal. Otherwise, the diagram is relatively straightforward.


First steps in beginning the wiring process are to de-pin the Harley Deutch style connectors for the speedometer and the Neutral/Signal light bar. These are relatively simple to remove and should not require special tools as long as you're careful.

Keep in mind that you do not have to relocate the wiring for the Neutral/Signal light bar if you want to leave it in the stock location. We decided to leave them in their stock location as per rider preference.

In some cases, the Pink tachometer wire may be buried somewhere in the mess of wires under the dash. Motorcycles that did not have a tachometer at all could have the Pink wire in a different location entirely.

Remove all Deutch male pins from the wires you intend to relocate. Lengthening may be necessary for some instances before crimping the supplied female terminal connectors. As a safety precaution, outlined in provided instructions, we soldered in an in-line fuse holder with a 1-amp fuse to the O/W 12v+ wire for additional protection before crimping the female terminal connector. Fuse protection is recommended and may not be necessary, but an additional $5.00 is worth it to protect your new investment from potential electrical damage in the event of a surge.

Once all your wires have been lengthened, and female terminal connectors installed, attach them to their respective male terminals on the tach/speedo. They can be quite tight so be extra careful so as not to break the wire when attaching.


The calibration for the Speedometer Pulse Per Mile is easy but may require prior planning or the help of a buddy with a working odometer for the 2-mile distance necessary for calibration.

Pulse Per Revolution calibration for the tachometer can be a little tricky. The instructions state that the pointer will move to 1/2 scale then you should release the trip button, this was not the case for us at all. It never moved to 1/2 scale. The needle will move to about 1/4 scale, or approximately 2000 RPM's, and then you release the trip button. From here on the instructions supplied should be followed for proper calibration.


With a total installation time of 1 1/2 hours and a slight headache, we were very pleased with how this new tach/speedo looks and performs. The bezel height is quite a bit taller and beefier than stock but creates a new focal point on the tank.

I hope this post has been somewhat helpful and that you're enjoying your new gauge.