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my 1998 mazda b2500 truck has an interminent problem with the alternatior. the alternator cuts out and it runs on the the batterty when there is a load on the system such as going up a hill or turning on the lights. It is a straight stick so if I push the cluth in and let it coast the alternator kicks back in and works. I have had the alternator replaced and the belt tensioner replaced the belt is good.

it does not always do this.

There may be a problem with the ground between the engine block and the chassis of the truck. Pushing in the clutch may complete this circuit.

thank you so much… I will spend the day checking all of the grounds and let you know what I find…I live at the grand canyon national park and the nearest machanic is 90 miles away.thanks again