1995 Lexus GS 300FACTORY OEM SERVICE PROCEDURE

Master Switch Test

Remove master switch. Check for continuity between specified terminals of master switch. See Fig 1 or Figure. See the appropriate MASTER SWITCH CONTINUITY TESTΒ  table. If continuity is not as specified, replace master switch.

MASTER SWITCH CONTINUITY TEST

Window Switch & Position Window Lock Switch Position Terminals No.
Driver's Switch
Off (Neutral) (1) 3 & 4; 4 & 6
Up (1) 3 & 8; 4 & 6
Down (1) 3 & 4; 6 & 8
Right Front Switch
Off (Neutral) Unlock 4 & 11; 4 & 13
" Lock 11 & 13
Up Unlock 8 & 11; 4 & 13
" Lock 8 & 11
Down Unlock 4 & 11; 8 & 13
" Lock 8 & 13
Left Rear Switch
Off (Neutral) Unlock 4 & 10; 4 & 12
" Lock 10 & 12
Up Unlock 4 & 12; 8 & 10
" Lock 8 & 10
Down Unlock 4 & 10; 8 & 12
" Lock 8 & 12
Right Rear Switch
Off (Neutral) Unlock 4 & 7; 4 & 14
" Lock 7 & 14
Up Unlock 4 & 14; 7 & 8
" Lock 7 & 8
Down Unlock 4 & 7; 4 & 14
" Lock 8 & 14
(1) Position does not affect driver's switch.
Fig 1: Identifying Master Switch Terminals
G93E83968Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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