1978 4600 su wiring help

[59chevy36]

Happy fathersday to all, I was getting my new dash ready to install and am having problems with where the wires come from and go to. looks like the wires that go to temp and oil senders are not getting to the dash. tried to ohm them out and looks open. I don't think they go thru the ign sw. alt light lites but oil press lite wont. new bulbs. Is there a wiring diagram? I have a 65-75 manual but that shows the gen wiring. fuel gauge wont work but that looks to be a open at the sender. Thanks for any guidance.

 

[sotxbill]

Should be a plug between the dash and the front harness.. its under the hood at the top of the gas tank... this needs to be plugged in to get passage to the oil, alternator, and heat....You may need to clean it and check for damage, corrosion there.

 

[59chevy36]

I saw two plugs a 6 and a4 will clean them and ck continuity from there. Also saw a fuse up under there . will see if its good also