1970 C10 what are these wires/plugs for?

[gordyzx9r]

We're trying to put our 1970 C10 back together after having the body/paint done so we decided to tackle a lot of the wiring some mad scientist did before us.

Found this broken wire on the passenger side, with a plug that must have had a glass fuse in it that corroded and caused it to stick and break when I pulled it apart.

There is an identical one on the driver side.

Can't find it in the wiring diagram...any ideas what it's for?

[Steve Wood]

That looks familiar from my Camaro days but I can not bring it up in my memory bank.

Makes me wonder if it has been added on.  Does a meter show it is connected?  Thinking of reading resistance to on the non hot side to ground.

[Steve Wood]

Also, check it for voltage to see what takes to get power going thru it.  Is one side hot with key off, on when the lights are on , radio on, etc.

[Steve Wood]

Under hood lights?

[ULYCYC]

This may help for that or future problems. I dont remember glass fuses on anything under the hood from the factory. I would say its a add-on to trigger a relay or single circuit since the wire gauge is so small

https://farm4.static.flickr.com/3645/3397411656_03c2a8064d_o.jpg