Switch Test Mode

The Switch Test Mode is used to check certain switch circuits.
1. Perform ``Diagnostic Test Code Display'' as previously described and wait for Code 55 to be displayed.
2. Ensure that both A/C and defroster switches are in Off position.
3. Depress ATM button and immediately place ``read/hold'' switch to ``read'' position.
4. When Code 00 is displayed, turn A/C switch to On position. If computer is receiving input, the display will change to Code 88 when switch is turned On and revert to Code 00 when switch is turned Off.
5. Repeat step 4 for defroster switch.