Originally Posted by wbrian63

You can build your own (or purchase from various sources on e-bay) a impulse counter tool to allow you to pull your own codes. There are 3 wires, one for 12v+, one for ground and one that plugs into the proper port for the system you want to pull codes for. It's easy as pie to pull codes - suggest a membership to AllDataDIY.COM for $20/year to give you access to all the codes these beasties can throw.