Hey guys, 

After a long saga of chasing my tail, I figured out that my alternator was shot. I had previously measured it with cheapy multimeter and it was holding a .02vac so I sort of put it at the back of my mind and kept on going. Anyway, I realized that my power probe had a true rms setting and remeasured and saw some pretty bad numbers.

 

I picked up a 02 Durango 160 amp hairpin alternator from O'Reilly today. I had them test it before I took it and it tested at .36. They couldn't get another until next Tues so I took it.  I installed it, and at idle its pretty much what it tested on the bench at the store. When the grids cycle on, Im seeing about 1.65vac. I couldn't find a reference for what is acceptable. It settles back around .03vac once the grids turn off.

Id love some input to whether that's normal and acceptable.

Here's a quick vid you can see the spike near the beginning when the grids turn on.

John

Edited November 14, 20204 yr by JHFIII

On 11/18/2020 at 8:19 PM, LorenS said:

@JHFIII glad you got it all figured out! Your under hood is like a surgery room or 5 Star Hotel compared to mine, just beautiful.

Thank you and Dieselfuture for the kinds words. It took a little bit of work. I can assure you there are plenty of rusty, oily and sharp things still there! 

Awesome pics Tractorman! Down here in Nampa we just have the bracing wind and light snow dustings. Sunsets are pretty sweet though.

Alas, my misfire/bucking issue persists. Im going to start another topic on that.