Checks, in order
- Battery testHave the battery load tested. A battery that won't hold a charge is the most common cause of a dead truck.easy $ · under about $50
- Belt and tensionCheck the serpentine belt for glazing, cracks and slack. A slipping belt means low charging output.easy $ · under about $50
- Alternator outputWith the engine running, battery voltage should be about 13.5 to 14.7 V. Much lower points to the alternator or its wiring.easy $ · under about $50
- Connections and groundsClean the alternator plug, battery terminals and engine ground. A loose connection can cause a charging light.easy $ · under about $50
- Parasitic drainPut a meter in series with the battery after the truck sleeps for a while. Pull fuses one at a time to find the circuit drawing power.medium $ · under about $50
Applies to: 1996 to 2002 4Runner with the 2.7L 3RZ-FE four-cylinder and the 3.4L 5VZ-FE V6, 2WD and 4WD, manual and automatic. Where a check only applies to one engine it says so.
Tools and parts for these checks
Links below are Amazon affiliate links: as an Amazon Associate, toyotadata earns from qualifying purchases, at no extra cost to you. Confirm fitment for your exact truck before you order.
| ITEM | USED FOR | BUY |
|---|---|---|
| Digital multimeter | Voltage, ground and continuity checks | Shop on Amazon |
| Battery load tester | Testing the battery under load before replacing parts | Shop on Amazon |
| Battery terminal cleaning brush | Cleaning corroded terminals and cable ends | Shop on Amazon |
Other starting & charging problems on the 3rd Gen 4Runner
More 3rd Gen 4Runner problems
- Clunk, knock or loose feel in the front end over bumps (Steering & Suspension)
- Shimmy, vibration or steering wander at highway speed (Steering & Suspension)
- Frame rust, rotten rocker panels or rusty underbody (Frame & Body)
- Engine overheating or temperature gauge climbing (Cooling)
- Pink or milky transmission fluid, or coolant in the transmission (Transmission)
- 5VZ-FE timing belt service: when is it due and how do I tell? (Engine)
All 16 3rd Gen 4Runner symptoms in the interactive troubleshooter →
General guidance from owner experience. Confirm torque specs, fluid capacities and procedures in the factory service manual. Brakes, steering and anything structural: if in doubt, have a qualified shop inspect it before driving.