Trouble Shooting Tru-Lok 4 Wheel Drive Harness Dash Codes

Codes When Installing Tru-Lok Harness

This can happen because the code is getting set during installation but should be an easy fix. Once this code gets set the TruLok Harness or even a Tuner if they try it, will not clear it. These steps must be followed step by step to clear the code.

First, make sure there is only one 4WD switch installed. The factory switch and our switch
cannot both be connected at the same time, as this can damage the harness. If our
harness was installed with the factory switch it could have damaged the harness as per the
instructions.

Please follow these steps in order. All the connections below are down at the differential
only, nothing under the dash.

1. With the key off and the machine fully powered down, disconnect the TruLok
harness from both the differential and the RZR.
2. Plug the differential directly back into the RZR’s factory wiring.
3. Start the unit and make sure the differential code clears. Sometimes you will need
to put it in gear and move it slightly before it recognizes the connection and
clears. There has also been times that some units require the factory switch to be
plugged back in, but this is rare and okay as long as both connectors of the harness
down by the differential are unplugged.
4. Once the light clears, let the machine idle for 10–15 minutes with no differential
code showing. This part is important so the ECU can clear its memory.
5. Shut it off and wait until everything completely powers down. (The interior lights and
any whining or humming sound need to shut off before unplugging anything.)
6. Back down at the differential, unplug the differential from the factory wiring. Plug the
TruLok harness into the RZR first, then plug the differential into the TruLok
harness. (If the factory switch was installed to clear the code make sure it is
removed)
7. Start it back up and check whether the code stays clear.

Please let us know the outcome, good or bad, so I know everything is taken care of or if we
need to troubleshoot further. If it comes back, send me a picture of the code and the
connections at the differential, and let me know whether 4WD works with the TruLok
installed. Pro UTV Parts 801 367 1395 

11-11-26