Have a 1966 f100 with some fuse box problems. One day the blinkers won't work, then it's the heater, then it's the windshield wipers because of the rusted clips on the fuse box. I want to buy a new fuse block from oreillys that hold 8 fuses but not exactly sure how to set it up and run the wires. I noticed that some wires on the back go into clips that are longer than others and are used for other things. Any tips or has anyone else experienced this? Any help is greatly appreciated!

 

I would carefully loosen the fuse block and separate it from the firewall. Turn it over and spray electrical cleaner on the back and check for loose or rotten connections. Then do the same on the front and remove and clean all fuse spades. Install new fuses with some bulb grease and try that for a while. I think the problem will be easier resolved by doing this process rather than replacing the fuse block. Wires corrode at the connections and finding and repairing the problem usually fixes things for years. Post back we like to find out how these issues resolve.

 

Not that knowledgeable; having said that, I used what is described as an electrical cleaner and it damaged the harness connector, ended having to replace; just saying, use caution in selecting cleaner?

 

Clean contact surfaces and adequate contact pressure are necessary for a good electrical connection.

CRC makes a good electrical contact cleaner, as do several other manufacturers. Just be sure the cleaner is designed for electronics / electrical contacts.

I like to use a brass bristle brush to clean the rust and corrosion from the fuse clips, rinsing well with the cleaner when done.

Make sure there is enough tension in the clips to firmly hold the fuses. Using a pair of needle nose pliers to lightly squeeze the clips can help put some tension back in them.

Inspect the clips carefully for signs of overheating, usually shows as "bluing" on the clip. Overheating can cause the clips to lose their tension. Severe overheating requires replacement of the clip.

Use a dielectric grease on any contacts to minimize any further corrosion.

Hope this helps.

 

Thanks for the help guys !