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CDM/GM300/Maxtrac/R1225 ETC programing cable

Building your own

This cable will require you to have a RJ45 to DB25 female adapter as pictured below:

RJ45 to DB25 Adapter

You can find these on ebay by searching for DB25 RJ45.

You will also need a short piece of 24 gauge wire to crimp two female pins to that need to go between pin 4 and pin 11 on the rib connector.

Pinout

RJ45 Jack Color DB25 Signal
Green 1 Ground
Orange 15 BUS+
White 12 A+
Black 25 Boot Control
None 4 Connect to pin 11
None 11 Connect topin 4

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