sediment and charge - uphill only

[zigzag]

My sediment and charge lights come on but only under hard 'acceleration' e.g. going up a steep hill and getting my foot down 'on the gas pedal'. Any suggestions?

[g8dhe]

Alternator error condition, maybe check the belt, but it is usually the alternator itsef.

[zigzag]

even though the warning lights only come on occasionally and not all the time?

[Northern Bongolow]

the alternator can under charge or over charge, or break down when revved hard, all may put your warning lights on.