1974 Plymouth Duster Project
First question, "Do you have a service manual?" If nothing else the 74 electrical is much different than 73.
You can download the 73 manual free from MyMopar. I posted the 74 wiring section which you can download
Go here
Free service manuals
Go down to post 64, and click the black icon and "save as".
Also go to MyMopar and download the free 2 page 3rd party diagrams. These are NOT complete and do NOT show all options or connectors but they can be easier to follow:
Wiring – MyMopar
Click on 1974 and unzip them. I have no idea why they chose to post them in that fashion, they used to be individual files
IF YOU HAVE NOT done so, bypass the annoying seat belt interlock. This is the "reset" box under the hood and has a button on the can. Permanently jumper the two "yellowish" wires together
Also please read the MAD article about problems with the ammeter circuit and the bulkhead connector:
There are other ways around this but the article gives a good overview of how and why this gives trouble, as well as a great simplified power distribution diagram
Catalog
Last but not least look for a WHITE connector under the hood. This should be the only white connector there, and connects the harness section for the engine to the rest of the car. They are subject to failure, especially with the high current wiring going through it Best thing is to just permanently splice the wiring and do away with the connector. Earlier cars did not have them
First question, "Do you have a service manual?" If nothing else the 74 electrical is much different than 73.
You can download the 73 manual free from MyMopar. I posted the 74 wiring section which you can download
Go here
Free service manuals
Go down to post 64, and click the black icon and "save as".
Also go to MyMopar and download the free 2 page 3rd party diagrams. These are NOT complete and do NOT show all options or connectors but they can be easier to follow:
Wiring – MyMopar
Click on 1974 and unzip them. I have no idea why they chose to post them in that fashion, they used to be individual files
IF YOU HAVE NOT done so, bypass the annoying seat belt interlock. This is the "reset" box under the hood and has a button on the can. Permanently jumper the two "yellowish" wires together
Also please read the MAD article about problems with the ammeter circuit and the bulkhead connector:
There are other ways around this but the article gives a good overview of how and why this gives trouble, as well as a great simplified power distribution diagram
Catalog
Last but not least look for a WHITE connector under the hood. This should be the only white connector there, and connects the harness section for the engine to the rest of the car. They are subject to failure, especially with the high current wiring going through it Best thing is to just permanently splice the wiring and do away with the connector. Earlier cars did not have them
