typically it will be the sending units or wires that go first.
oil pump itself is prolly fine. there's a relief valve on the pump that can be cleaned/inspected.
do you have a t-stat in it? did someone pull it? it needs the two stage t-stat. usually ppl have a bad t-stat. change it using an after market one. that makes the 22R/RE motors over heat. they can't figure it out, so it's just removed.
here's a FREE full "toyota factory shop manual" for dl,
http://www.ncttora.com/fsm/87-4Runne...4runner_88.pdf
not a cheap chilton/haynes book.
oil pump specs and inspection procedures start on pg 334.
trouble shooting info for your charge lite is on pg 336.
owner 93 toy pu 4x4, 88 toy pu 4x4.
Analog instrument cluster 1988 Toyota Truck?
Linear Mode
