Burned Resistor?

[TMHark]

The old beast started stalling so I got my spare PMD out to test

Old PMD - no start. Newer PMD - fires right up

Swapped spare PMD onto heatsink with thermal compound

Went to swap #9 resistor, and I noticed it looked funny. Almost looks like a blown fuse, with the line running from the resistor missing a piece near the bottom. Ugly photo didn't quite show it on it's own, so I drew in the path and missing section at bottom



So PMD and resistor? Spare is the used one sent to me to setttle a score with a vendor, and I believe is "used - tested good" one. Wonderful. Best one for the money out there is which one at the moment???

 

[Turbine Doc]

read across those 2 pins with a meter & see if it has continuity and what resistive value you are getting, kind of hard to tell what you are seeing, do you have a Macro setting on your camera for a better/clearer picture ?

 

[Turbine Doc]

I had a good on here in my desk a # 5 see attached photos 1782 is the # on the black resistor "chip" same as what my DVM reads for the resistive value

 

[TMHark]

Here's a better pic

Cell phone camera was set on "close up" LOL here's a real pic:



Yeah, it's burned all right

Probably happened when that cheesy POS extension cable went bad on me, :WTF:

I'll check it with a meter when I get home, but it is fried just below the actual resistor (red lines)

 

[Turbine Doc]

Looks "smoked" in 2 places or is that bad lighting

 

[buddy]

You by chance ever use one of them jump starter charger things to jump your truck? trying to think of a way you got enough potential energy across there to burn it. That goes from the ignition power to a PCM input.

 

[TMHark]

It is cooked! No continuity across those two pins

The line is completely burned off in those two spots and blackened around that curved corner area

Just took the truck out (with no resistor at all) and didn't notice any difference at all

Maybe my spare PMD is drivable, and I don't need a resistor???

Probably getting more than enough fuel with the KOJO tune anyway!

 

[TMHark]

Buddy - In an earlier post, I went a few rounds with a vendor and a POS extension cable

If you can find it, take a look at that cable end pic, it matches this damage exactly

I don't have a supercharged truck starter/charger. On the few occasions that I've needed to, I just "jump" the pass side battery that feeds the starter

My little charger is maxed at 60 amps Start Setting, almost half of my alternator :hihi:

 

[buddy]

In my book that is a high powered jump starter. 60 amp jump starters may only provide "60 amps" but what is the voltage regualted to on that thing? Next time you pull the load while cranking see what voltage it hits. 60 amps at 12V would be 720Watts, but 60 amps at 18V would be 1080 Watts. And sometimes voltage potential alone will hurt electronic components.

Have to beware on these jump starters that run on AC voltage.