S-SERIES AIR CONDITIONING - HEATER SYSTEM 4. Disconnect wiring harness connector from blower switches. 5. Remove   blower   switch   mounting   screws   and remove switch from control assembly. Installation 1. Position  blower  switch  to  control  assembly,  and install switch mounting screws. 2. Connect wiring harness connector to blowerswitch. 3. Position   control   assembly   in   instrument   panel and    install    trim    plate    and    mounting    screws. Reinstall ash tray, if removed. 4. Install knob onto blower switch lever. 5. Tum   key   switch   ON   and   check   operation   of blower    switch.        Tum    key    switch    OFF    after operation test. HIGH-SPEED AND LOW PRESSURE SWITCH RELAYS Removal 1. Disconnect battery cable. 2. Remove   cover   from   right   side   of   instrument panel. 3. If  relays  are  accessible,  proceed  to  step  4.    If relays cannot be reached, remove radio/ash tray panel, as follows, to gain access to the relays. a. Remove    radio/ash    tray    panel    mounting screws and pull panel outward. b. Disconnect  radio  power  feed  wire,  speaker leads and antenna lead from radio. c. If   necessary,   disconnect   hourmeter,   front wheel drive warning light, engine oil temperature    gauge    and    transmission    oil temperature gauge wiring. d. Disconnect   ash   tray   light   from   ash   tray frame. e. Remove radio/ash tray panel. 4. Using  offset  screwdriver  or  screwdriver  socket, remove    relay    mounting    screws    and    remove relay(s) from air duct (Figure 30). 5. Disconnect     wiring     harness     connectors     from relay(s). Installation 1. Connect wiring harness connectors to relay(s). 2. Position relay(s) on air duct and install mounting screws.    Use  offset  screwdriver  or  screwdriver socket to tighten screws. 3. Reinstall  radio/ash  tray  panel  and  related  parts (if removed). 4. Reconnect battery cables. 5. Tum   key   switch   ON   and   check   operation   of relay(s).    Turn  key  switch  OFF  after  operation check. Figure 30.  - Removing Relay 6. Install instrument panel cover. CTS-4066A Page 19