Retractable Headlight Control Unit Input Test
Remove the rear bulkhead panels and disconnect the
18-P connector from the control unit.
Inspect the connector terminals to be sure they are all
making good contact.
If the terminals are bent, loose, or corroded, repair
them as necessary, and recheck the system.
If the terminals look OK, make the following input
tests at the connector.
If any test indicates a problem, find and correct
the cause, then recheck the system.
If all the input tests prove OK, the control unit
must be faulty; replace it.
NOTE: Different wires with the same color have
been given a number suffix to distinguish them
(for example, RED/YEL1 and RED/YEL4 are not
the same).
REAR BULKHEAD
RETRACTABLE HEADLIGHT
CONTROL UNIT
View from
wire side
RED/GRN2
PNK/BLK
LT GRN/REDYEL/WHT
YEL
YEL/BLU
YEL/GRN
WHT/YEL
GRN/WHT1 RED/YEL1
18-P CONNECTOR
BLU1
BLU/RED
BLK1
WHT/GRN BLK2
RED/YEL4
Main Menu Table of Contents
No. Wire Test condition Test: Desired result Possible cause if result is not obtained
7 LT GRN/ Passing switch ON. Check for voltage to ground: – Faulty headlignt relay or dimmer
RED there should be battery relays.
voltage. ∙ Blown No. 49 (20 Al and No. 52
(20 Alfuses.
∙ Faulty passing switch.
– An open in the wire.
8 BLU/RED Retractor motor stationary. Check for voltage to ground: – Blown No. 42 (15 A) fuse.
There should be battery – Faulty right retractor relay.
voltage. – An open in the wire.
BLU1 ∙ Blown No. 43 (15 A) fuse.
– Faulty left retractor relay.
– An open in the wire.
9 YEL Under all conditions. Check for continuity to – Faulty right retractor cut relay.
ground: ⋅ Poor ground (6202).
There should be continuity. – An open in the wire.
YEL/GRN ∙ Faulty left retractor cut relay.
– Poor ground (6202).
– An open in the wire.
10 RED/VEL Ignition switch ON. Connect battery power: – Faulty safety indicator circuit.
The retractable headlight mal- – An open in the wire.
function indicator should
come on,
11 WHT/YEL Headlight retractor switch Check that there is no con- – Faulty headlight retractor motor.
– OFF (retractable headlight tinuity between the WHT/YEL
GRN/WHT‘ closed). and the GRN/WHT’ (or YEL/
(YEL/BLU) Connect an ohmmeter BLU) terminals.
with the negative lead to
the WHT/YEL terminal,
and the positive lead to
the GRN/WHT‘ (or YEL/
BLU) terminal.
Raise the headlights half» Check for continuity between ∙ Faulty headlight retractor motor.
way by turning the retrac- the WHT/YEL and the GRN/ – An open in the wire
tor knob clockwise. WHT‘ (or YELIBLU) terminals:
There should be continuity.
Turn the retractor knob Check that there is no con— ⋅ Faulty headlight retractor motor.
clockwise till the head- tinuity between the WHT/YEL
lights are fully raised. and the GRNNVHT‘ (or YEL/
BLU) terminals.
12 YEL/WHT Headlight retractor switch Check that there is no con- ∙ Faulty headlight retractor motor,
– OFF (retractable headlight tinuity between the YELNVHT
GRNNVHT‘ closed). and the GRN/WHT‘ (or YEL/
(YEL/BLU) Connect an ohmmeter BLU) terminals.
with the negative lead to
the WHT/YEL terminal,
and the positive lead to
the GRNNVHT‘ (or YEL/
BLU) terminal.
Raise the headlights half- Check for continuity between ∙ Faulty headlight retractor motor.
way by turning the retrac» the YELNVHT and the – An open in the wire.
tor knob clockwise. GRN/WHT‘ (or YELIBLU) ter-
minals:
There should be continuity.
Turn the retractor knob Check that there is no con- – Faulty headlight retractor motor.
clockwise till the head- tinuity between the YELNVHT
lights are fully raised. and the GRNIWHT’ (or YEL/
BLU) terminals.
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