8206noco.fm Page 213 Thursday, July 2, 1998 1:19 PM
SYMPTOM RELATED DIAGNOSTICS SWITCH CIRCUIT FAILURE (continued) Test 34
Test 138
Checking for proper switch operation
Checking for a short to ground in the switch
1. Turn the ignition key to the OFF position.
1. With the ignition key in the OFF position, check for continuity from either pin on the switch to a good ground. Turn the switch ON and OFF.
2. Turn the switch ON. 3. Check for continuity across the two leads of the switch.
If there is continuity, proceed to Test 69. If there is no continuity, replace the switch. Retest to be sure the problem has been corrected.
If at any time there is continuity between the switch and ground, replace the switch. Retest to be sure the problem has been corrected. If there is no continuity with ground, there is a break in the wire which supplies the switch signal to V-MAC II. Repair or replace the wire. Retest to be sure the problem has been corrected.
Test 69 Checking for a short to ground 1. Disconnect the remaining V-MAC II module connectors. 2. Check for continuity between the switch signal pin and each of the other pins (one at a time) on the J1A, J1B and J2 connectors, and also a good ground.
If there is continuity with another pin or ground, locate and repair the short in the harness. Retest to be sure the problem has been corrected. If there is no continuity, proceed to Test 138.
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