1-4 Upshift System Relay (Manual Transmission)
- Turn ignition off. Disconnect 2nd-3rd shift relay connector. Check for continuity between relay terminals No. 85 and No. 86. See Fig 1
. If continuity does not exist, replace relay. If continuity does exist, go to next step.
- Energize relay by applying battery voltage to terminal No. 85 of relay and grounding terminal No. 86. Check continuity between relay terminals No. 30 and No. 87. See Fig 1
. Continuity should exist while relay is energized. Replace relay if it does not test as described.
Courtesy of GENERAL MOTORS CORP.