Battery Post Cable Clamp
With the complex electrical systems of these trucks, I am a bit concerned with doing something like that. But I have a corroded post clamp that doesn’t look too good even after cleaning.
I have a 2017 F350 6.7 with 2 batteries.
With the complex electrical systems of these trucks, I am a bit concerned with doing something like that. But I have a corroded post clamp that doesn’t look too good even after cleaning.
I have a 2017 F350 6.7 with 2 batteries.
The newer style is nice because they typically have at least one post to attach a +12v ring terminal to to power accessories without having to remove the clamp itself.
Besides, the OEM clamps have a very nice feature that traditional batter clamps lack... the diagonally opposed sliding blocks used to tighten the clamps around the post. From a mechanical point of view, it is a very clever way to repeatably apply and release clamp contact with the post, without weakening, work hardening, distorting, or otherwise even disturbing that part of the clamp actually responsible for making the contact. For all the ills of non-leaded Ford factory battery clamps made since 2002, this sliding block clamping method I would consider a sound success.
But the material of the clamp itself is thin (eats away easily), and the coatings on the clamp do not appear to be thick enough to keep corrosion at bay.
Have a look at what I encountered on a 2019...
A cocktail bar of remedies... not shown is the brass bristle brush...
After wire brushing the developing corrosion with a brass bristle brush and applying a post cleaner, a layer of red protectant is applied over the eyelet, while a chemically soaked red felt battery washer is layered underneath.
A paper towel positioned under the terminal manages any slop from overspray of the icky sticky red stuff.
At the part of the battery clamp that wraps around the battery post, an amalgam of Silcone Dielectric Grease is mixed with the icky sticky red stuff, and applied to the post/clamp area AFTER the clamp and post are cleaned, clamped, and torqued. Some folks advocate slathering it on before the connection is made, but I have it on good authority (a former Ford automotive electrical engineer) that the best practice is to make the connection clean and dry, and apply coating to the completed connection.
Same thing other side:
The negative ground cable carries the same amount of current as the positive cable, and when the ground cable rots, the electrical system goes just as dead. So the same attention is given to the negative post and clamp, only with just the Silicon Dielectric Grease, and not the red stuff, because my mind can't handle having red on both battery posts.
And here is something else to consider while at it...
Can't win the war without fighting the battles. This is round one. Less than an ounce of goop, for more than a pound of cure. New factory battery leads are expensive. I've never had to buy any replacement battery cables or clamps in 40 years, by getting after these coating these connections early, and monitoring them every so often (such as when changing the oil).
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Besides, the OEM clamps have a very nice feature that traditional batter clamps lack... the diagonally opposed sliding blocks used to tighten the clamps around the post.
















