starting problem on 1996 Toyota 4Runner

96 4runner doesn,t start sometimes usally one click back& forth a few times w/ key it starts. starter is 3yrs battery is 3 months. had this problem for 1 yr. I been spraying the starter wire w/ WD 40 lasts for a couple of weeks but now it,s not working what do you think.

Asked by for the 1996 Toyota 4Runner
You need to have the voltages checked at the starter when prob occurs and see what is out of whack.