Rewiring my EFI Magnum - 1970 Dart Swinger

DionR said

Nice! I completely agree, it has the built in capabilities so why not use them.

Don’t remember the specifics on an OBD1 setup but the OBD2 system I had planned to use had variable resistance on one or two wires to tell the PCM which button was pushed. Is the OBD1 just one wire per button? Is so, should be cake to make it work.

I’m planning to do something similar with my G3 swap, but those commands are on the bus so I have to sniff the codes and build a module to replicate them. Not quite as easy.

Click to expand...

Yeah, the obd1 is dead simple. It's just one wire per button, and another to the brake switch.

Obviously OBD1 is very limited in that it can't be tuned, but but it's what i had from the ambulance so I went with it. Although the obd2 Magnums are not complicated by any stretch. Way more simple than anything needed for a G3 swap!

A while ago I did buy an obd2 harness and PCM and planned to upgrade my setup. Then I found a 46rh and had it installed. So then I would need a 46re to make the OBD2 upgrade work. Then I found a Mopar Performance OBD1 PCM, and put to rest and thoughts of going to OBD2.