Page text (OCR transcript)
OUTLINE OF EWD B
4 Next, check if the headlight relay points are closed and there is power to the pin No. 2 of 30. See step 1-(b)
If no voltage, trouble lies in the headlight relay.
(e) Check which systems (components) have the same ground point.
The ground points are listed in system No. 30 (GROUND POINTS). As shown, GROUND POINT ∇ is used for other components besides the HEADLIGHT SYSTEM, and it also connected to GROUND POINT ∇
(f) Check how the HEADLIGHT SYSTEM is connected to the other systems.
1 From the EWD SYSTEM INDEX (facing the first EWD), we can find the location of the headlight system within the ELECTRICAL WIRING DIAGRAM at the back of the book (Page 4 of 5, grid 3 and 4).
2 By referring to the ELECTRICAL WIRING DIAGRAM, we can see that the HEADLIGHT SYSTEM is related to the TAIL and ILLUMINATION SYSTEM.
NOTE:
The relationship between system circuits is not shown so always confirm with the overall wiring diagram.
(g) Re-check
After repair, check that the circuit functions normally. Always follow the steps described above to narrow down the possible range of the trouble.
-7-
B-24
IGN
HEADLIGHT DIMMER
SW
TAIL SW
GAUGE AND FLASHER
HEADER-LIGHT SW
HEAD LIGHT
SHORT PIN
TAIL LIGHT
30 — GROUND POINTS
SYSTEM INDEX
CELICA SUPRA
SYSTEMS LOCATION
EFI Computer Circuit 1-2
Flash Warning 3-1
Auto Antenna 5-1
Front Wiper and Washer 5-2
Headlight 5-3 5-4
Headlight Cleaner 5-4
Horn 5-5
1985 Manual (Page 1 to Page 5)
SYSTEMS LOCATION
Power Windows 2-1 to 3
Fog Light 3-4
Tail/Stop Light and Hazard 4-3 to 5
Back Up Light and Horn 5-1
Electrical Door Lock and Retractable 5-3 to 5
Roof Opening
