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HOMESERVICE MANUALSGMC1992SAFARI VAN CARGO, 4.3 WREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSDIAGNOSIS - A/TSERVICE BULLETINSCHECKING FOR GROUND AT TERMINAL "D" AT TRANS. USING ALDL
1992 GMC Safari Van Cargo, 4.3 W

Checking For Ground At Terminal "D" At Trans. Using ALDL

1992 GMC Safari Van Cargo, 4.3 WSECTION Checking For Ground At Terminal "D" At Trans. Using ALDL
  1. Before performing this test, CHECKING VOLTAGE TO TERMINAL "A" OF TRANSMISSION USING ALDL test must pass. Otherwise, see CHECKING FOR GROUND AT TERMINAL "D" AT TRANSMISSION. Test light should be connected between terminals "A" and "F" at ALDL connector. See Figure With engine at normal operating temperature, road test vehicle. When road test is started, test light should light.
  2. If brake pedal is applied, test light will not light. Watch test light to see if test light goes out during road test. If test light goes out, terminal "D" is grounded at transmission. See GROUNDING "D" WIRE AT TRANSMISSION USING ALDL . If test light does not go out, a computer system problem exists. See CHECKING SELF-DIAGNOSTIC SYSTEM.
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