This is a guide to making a harness for a hall speedometer corrector or Speedohealer.
If anybody is interested in a new corrector with the correct harness included for a good price 12oclocklabs has one that you can usually find on ebay for about $70.
** You should have basic wiring skills and be careful, the harness connects directly to the PCM and mistakes could cause serious damage **
Making a harness will allow you to put an inexpensive used HealTech Speedohealer commonly found on ebay in any TJ. They are primarily used on motorcycles and since most people put the stock sprockets back on their bikes when they get rid of them they often also sell the Speedohealer. There are no Jeep specific electronics, the harness is all that is different for our Jeeps.
If you are interested in calibration or general operation of the Speedohealer the directions from can be downloaded from HealTech. If you buy one used it may have a custom setup, it pays to read and understand how to program it so you can check and clear any previous settings. Any version of the Speedohealer should work but this is the current version and what I used.
SH-V4 User Manual
If you want some detailed information about how to calibrate your Speedohealer I put together some information in another thread.
How-to calibrate your odometer using OBD, GPS and a SpeedoHealer
To begin you need a Speedohealer with the motorcycle harness. You will also need the male and female connectors for the Jeep and optionally a length of four strand wire if you want to locate the Speedohealer beyond the reach of the cable you have. The connectors are called Delphi/Aptiv APEX 2.8 series. They are available from Ballenger Motorsports. The male connector is CONN-76016 when sold with pins. The female connector is CONN-76015. There are other places to source the connectors and some have pigtails already attached. The process is still about the same.
Here's what they look like.
The wiring to the hall sender is shown in the factory service manual. Here is the diagram for a 2004. You might need to check the colors for different model years.
Here's the basic wiring diagram for the harness using the colors from the manual to be sure everything goes where it belongs. If your Speedohealer has different color wires just find the manual for it and follow the diagram, they all have four primary connections ground, power, signal in and signal out. Some variants will have a second harness and button, you can leave that disconnected.
You can see each wire going to the factory sending unit. While Rubicons use a different style sending unit the connectors are the same so it'll work either way.
The Speedohealer I bought was for a Yamaha YZF-R1, I just cut off the motorcycle connectors and put the Jeep connectors on. Be careful you get everything going to the correct pins. The factory diagram has the pin numbers and the colors should be easy to see in the pictures.
The finished assembly should look something like this.
Here's mine after a few months of use. It's taken a few dips in the mud and is holding up just fine. The APEX connectors are sealed.
If you need to extend the harness simply cut and extend using whatever wire you want. This is a low voltage signal and as long as your connections are solid almost anything would work. The commercially available Jeep harness is pretty long so the Speedohealer can be mounted near the PCM but there is no reason you need to follow that path. I routed mine up into the rear of the tub behind the driver seat.
If anybody is interested in a new corrector with the correct harness included for a good price 12oclocklabs has one that you can usually find on ebay for about $70.
** You should have basic wiring skills and be careful, the harness connects directly to the PCM and mistakes could cause serious damage **
Making a harness will allow you to put an inexpensive used HealTech Speedohealer commonly found on ebay in any TJ. They are primarily used on motorcycles and since most people put the stock sprockets back on their bikes when they get rid of them they often also sell the Speedohealer. There are no Jeep specific electronics, the harness is all that is different for our Jeeps.
If you are interested in calibration or general operation of the Speedohealer the directions from can be downloaded from HealTech. If you buy one used it may have a custom setup, it pays to read and understand how to program it so you can check and clear any previous settings. Any version of the Speedohealer should work but this is the current version and what I used.
SH-V4 User Manual
If you want some detailed information about how to calibrate your Speedohealer I put together some information in another thread.
How-to calibrate your odometer using OBD, GPS and a SpeedoHealer
To begin you need a Speedohealer with the motorcycle harness. You will also need the male and female connectors for the Jeep and optionally a length of four strand wire if you want to locate the Speedohealer beyond the reach of the cable you have. The connectors are called Delphi/Aptiv APEX 2.8 series. They are available from Ballenger Motorsports. The male connector is CONN-76016 when sold with pins. The female connector is CONN-76015. There are other places to source the connectors and some have pigtails already attached. The process is still about the same.
Here's what they look like.
The wiring to the hall sender is shown in the factory service manual. Here is the diagram for a 2004. You might need to check the colors for different model years.
Here's the basic wiring diagram for the harness using the colors from the manual to be sure everything goes where it belongs. If your Speedohealer has different color wires just find the manual for it and follow the diagram, they all have four primary connections ground, power, signal in and signal out. Some variants will have a second harness and button, you can leave that disconnected.
You can see each wire going to the factory sending unit. While Rubicons use a different style sending unit the connectors are the same so it'll work either way.
The Speedohealer I bought was for a Yamaha YZF-R1, I just cut off the motorcycle connectors and put the Jeep connectors on. Be careful you get everything going to the correct pins. The factory diagram has the pin numbers and the colors should be easy to see in the pictures.
The finished assembly should look something like this.
Here's mine after a few months of use. It's taken a few dips in the mud and is holding up just fine. The APEX connectors are sealed.
If you need to extend the harness simply cut and extend using whatever wire you want. This is a low voltage signal and as long as your connections are solid almost anything would work. The commercially available Jeep harness is pretty long so the Speedohealer can be mounted near the PCM but there is no reason you need to follow that path. I routed mine up into the rear of the tub behind the driver seat.
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