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In this video I bring you along as I have a look at a customers Ram 3500 with the big hemi that was dropped off with the money light on. I took a look at it to discover it was missing power to the fuel tank pressure sensor. Now it is a matter of determining if it is the PCM or broken wire.
-Enjoy!

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35 thoughts on “Ram 3500 Cab & Chassi: The Hunt For The Broken Wire

  1. Using hose to prevent abrasion is a great idea – highly recommended. I use it all the time and keep a bin of various sizes of old hoses I've removed from cars (free stuff – better still :).
    QUICK TIP: Spiral cutting the hose with a utility knife and then wrapping it around the harness has the following advantages:
    A. It works to transition 'Ys' in the harness. And two spiral cut hoses can be interwoven to cover the junction of branches in a harness.
    B. A spiral cut hose won't retain water like a split hose might if the cut was on the upper side.
    C. A spiral cut hose stays in place on tight bends without tape or zip ties.
    D. The hose doesn't need to be the 'right size'. A hose with an ID smaller than the OD of the harness can still work.
    E. And spiral cut hoses can be used to hold a harness together temporarily while troubleshooting, testing, or rewiring. When done, you can be taping up the harness while unwinding the spiral, saving the need for an extra hand. (Keep it around for the next time)

  2. Having driven through a puddle of liquid cow poo and suffered the smell-o-vision for an hour afterwards, the fact that he did the whole job "dry" was a matter of self-preservation!

  3. It would feel like scanning all the cables for rubbing problems would be a good thing, but as many mechanics would tell you, if it's not broken, then leave it alone.

  4. Old man glasses? I put on a weak pair for general reading and a strong set for the critical view of circuit board repair. Bad boards can look fine but show damage under magnification.

  5. Eric, I won't need to do 99.9% of the repairs you do in my lifetime, but you have me ready in case I do. Just a weekend backyard Hondo mechanic enjoying the best, funniest Youtube mechanic out there!

  6. Good job he didn't go to the dealer, he might have ended up with a new fuel tank, purge valves and a new PCM before they gave up and presented the customer with a $5000 bill!

  7. Eric, I really enjoy your videos. I have learned so much and even did the brakes on my Nissan Murano for the first time ever after watching your content. Thanks very much. An interesting fact for you since you enjoy the word CRUD with significant enthusiasm. It is actually an acronym that stands for Chalk River Unidentified Deposit. It relates to some extremely hard deposits found in systems of early nuclear reactors. They were first researched at Chalk River Nuclear Laboratories, part of Atomic Energy of Canada Limited in Chalk River, Ontario. Go, CRUD!! All my best to you and your family.

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