Re: [diesel_mercedes] Fwd: Interesting alternator problem

 

On 1/11/2011 10:35 PM, Stan George wrote:

 

Had the same problem with my 73 Dodge PU. Everything tested ok but on
the truck there was no charging. All circuits checked out for
"continuity" buttttttttttttttttttttttttttt what I didn't know was the
wire to energize the field coil was hanging by one strand of wire. It
would have continuity but could not pass enough amps to energize the
field coil. Possible????
--
Stan George Portland <<

Thanks everyone for the suggestions.  I was guilty of Geezer Think "I've seen this before and I did this and it worked", only this time it didn't .  I had noticed some funky wires at the terminal block on top of the right front wheel inner panel caused by a rust through right under the block.  One of the wires was terminal at the terminal due to corrosion.  I made up a 5" square steel panel to cover the hole, sealed it with panel sealer,  installed a better terminal block  and spliced in a new wire section.  I also used shrink tubing on all of the wires as additional protection.  Problem solved!  Incidentally, the 300D  factory manual didn't cover alternator testing or any details other than the wiring diagram while the 300SD  CD showed block diagrams of several of the circuits including the generator circuit as well as test directions. 

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