What to Expect: Typical Service Times
- Baseline current measurement and module sleep period: 30 to 45 minutes
- Fuse-by-fuse isolation to identify responsible circuit: 30 to 60 minutes
- Component identification within the circuit: 30 to 90 minutes
- Draw source repair: 30 minutes to 2 hours depending on the cause
How Our Technicians Approach Parasitic Draw Testing
When a parasitic draw is suspected, we connect a clamp ammeter to the negative battery cable and wait for all modules to complete their shutdown sequences before taking a current reading. This waiting period is important because many modules remain active for several minutes after the ignition is switched off before entering sleep mode.
Once we have a stable reading that exceeds the acceptable standby threshold, we pull fuses one at a time while monitoring the current reading, working through the fuse panel systematically. When the current drops significantly with a specific fuse pulled, we have identified the circuit.
We then investigate what is connected to that circuit and narrow down the specific component that is not shutting down by disconnecting individual loads or using module-specific sleep commands through the scan tool. Once the source is confirmed, we address the repair and verify the draw has returned to an acceptable level. Our 2 ASE certified technicians have experience performing parasitic draw tests across a wide range of domestic and import vehicles, including vehicles with complex module sleep timing.
