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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Vehicle Access System) >> Diagnostic Information and Procedures >> Access Panel Release Malfunction >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Relay Test

  1. Ignition OFF, disconnect the appropriate access panel relay.
  2. Test 60 - 200 Ω between terminals 85 and 86.
    • If the resistance is not within the specified range, replace the relay.
  3. Test for infinite resistance between the following terminals:
    • 30 and 86
    • 30 and 87
    • 30 and 85
    • 85 and 87
    • If not the specified value, replace the relay.
  4. Install a 15 A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 Ω between terminals 30 and 87.
    • If greater than the specified range, replace the relay.

Access Panel Actuator Test

  1. Ignition OFF, disconnect the harness connector at the appropriate access panel actuator.
  2. Ignition ON, install a 15 A fused jumper wire between the control terminal 3 and 12 V. Momentarily install a jumper wire between the ground terminal 4 and ground. The access panel actuator should perform the RELEASE function.
    • If the function does not perform as specified, replace the access panel actuator.
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