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Idahome
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Negative battery cable disconnected
We need to use the Dakota box in order to produce the now missing speedometer calculations for this Ranger
The old v6 transmission had a OSS (output shaft speed) sensor in its tailhousing.
The V6 engines computer received the signal from this old OSS sensor and performed some calculations, effectively "buffering" the signal into something the Ranger instrument cluster, cruise control, and electronic shift 4x4 can understand. Basically 8000 pulses per mile based on your tire size, is the goal here, that will make all systems happy.
The dakota box requires 4 wires:
1. Speed sensor input
2. Speed sensor output
3. Power in Run or Acc (12V+)
4. Ground (12V-)
Wire 1:
In a 2000 Ranger we can get the speed sensor input from under the dash. The rear axle speed sensor signal is sent to the 4wabs controller (under the hood) and then inside the cab as circuit 679 grey with black (GY/BK)
This wire can be found entering the cab through connector C135
Under the dash. Wire is CUT. Side from the 4WABS computer is sent to the Dakota box as speed sensor IN
Here I soldered and heat shrink a RED wire to act as wire 1, speed sensor in
Wire 2:
Speed sensor output, From the Dakota box back to the truck
This is the BLUE wire, taking our now "buffered" signal back to the truck
Red and blue wires are carefully routed under dash to reach behind the stereo bezel/ to the gem module
Wires 3 & 4:
Power and ground can be found at the GEM module
The Dakota box will be mounted near the gem module, so this is where the wires need to terminate
BK/PK will serve as wire 3, 12V+ in RUN or ACC
BK will serve as our ground
I ran a red and black wire, spliced and soldered into the factory wires
Dakota wiring
Dakota wired! Time to set it up, there are a few initial settings I will cover
Now this trucks speedometer can be adjusted via bluetooth (or manually) while driving. Now that the trucks GEM module is aware there is a speed sensor, the transfer case will also allow the LOW RANGE shift.
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I build custom RBV, specializing in drivetrain conversions, wiring, suspension and complete custom trucks