Need some electrical help with my ‘68 Plymouth Valiant 100

Dana67Dart said
this link will download a ZIPped Plymouth 68 Factory service manual. It would be eastly downloaded on a PC rather than a phone BUT it can be done.

I don't know your computer skills so here in a nut shell.


  1. click on the link
  2. a download will start
  3. once it is downloaded you will need to unZIP it (Zip is a file compression program) Windows & Apple PCs, should be able to decompress it. Android and Apple phones I'm not sure if they can decompress ZIP files without an App.
  4. Save the decompressed file in a convenient location. It will be a PDF type file


Apple Phone Decompress
Open a ZIP file
Open the Files app
Find the ZIP file or archive you want to open
Tap the ZIP file or archive
A folder with the same name as the ZIP file will be created
Tap the folder to open it
Tap the files within the folder to view them

Android Phone Decompress
Open the Files app
Find the zip file
Select the zip file
Tap Extract
The extracted files will be saved in the same folder as the original zip file
Click to expand...
Thanks for this I’ll have to get my laptop up and moving to download this.

so while I was looking at the coolant leak I decided to maybe take some time to try and figure out what is going on with the wiring, since the heater doesn’t work nor does the radio (not end of the world, but just curious why it doesn’t), I tested all of the fuses and the heater/AC fuse doesn’t work. Some other specific AC fuse doesn’t work, and the radio/rear light fuse doesn’t work. I replaced the ones that were dead and still nothing. I then used a circuit/fuse tester with the light on it, touched those fuse ends and none of the three lit up, even with new fuses in them. So I was curious if the fan motor worked at all and for some reason the fan motor wires are internal not on the firewall under the hood, so i unscrewed the glove compartment box and found them behind it.

I used a wire and wrapped one end around one of the fuses that worked (around the park light/headlight fuse), and touched it to those fan motor wires and they started working. I couldn’t really figure out what else was causing those fuses to not work (besides the AC one because there is no AC compressor at all) and unsure on how to wire chase this issue. For now so i have defrost/heat at least, I used a wire and tucked it around the headlight/park light fuse then connected it around the heater/AC fuse, so when I have the headlights or parking light on, I can utilize the heater and defroster. It gets snowy and cold here in the winter, so it’s nice to have.