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Discussion Starter #1
Well I whet to turn on my car last night and I have the option that will automaticaly turn your lights on and off during night time. Now my driving lights come on but my head lights don't come on anymore.

Has anyone else had this problem?

If not can someone provide me with the wiring of that curcuit.


Thanks
 

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From the 1995 Service Manual, here's the pinpoint test for "Headlamps Inoperative With Autolamps On":

PINPOINT TEST BA: HEADLAMPS INOPERATIVE

BA1 CHECK SUPPLY TO AUTOLAMP AMPLIFIER
Gain access to the light sensor amplifier connector as outlined.
Turn ignition switch to the RUN position.
Using a test lamp connected to a good ground, check Circuit 640 (R/Y) for voltage.
Did test lamp illuminate?
Yes
GO to BA2.

No
SERVICE Circuit 640 (R/Y) for open. RESTORE vehicle. RETEST system.


BA2 CHECK BATTERY SUPPLY
Using test lamp check Circuit 221 (O/W) for voltage.
Did test lamp illuminate?
Yes
GO to BA3.

No
SERVICE Circuit 221 (O/W) for open. RESTORE vehicle. RETEST system.


BA3 CHECK CIRCUIT 57 (BK) AT AUTOLAMP CONTROL
Gain access to autolamp control switch connector as outlined.
Using a test lamp connected to known good ground, connect second lead to Circuit 57 (BK) at autolamp control connector.
Actuate headlamp time delay switch to the OFF position.
Measure resistance.
Does ohmmeter read infinity?
Yes
GO to BA4.

No
REPLACE headlamp time delay switch . RESTORE vehicle. RETEST system.


BA4 CHECK AUTOLAMP HEADLAMP TIME DELAY SWITCH
Leave ohmmeter connected to ground.
Actuate headlamp time delay switch to the ON position.
Measure resistance.
Is resistance 5 ohms or less?
Yes
GO to BA5.

No
REPLACE headlamp time delay switch . RESTORE vehicle. RETEST system.


BA5 CHECK CIRCUIT 220 (P/O)
Disconnect headlamp time delay switch and light sensor amplifier .
Using an ohmmeter check continuity of Circuit 220 (P/O) from control switch to light sensor amplifier .
Is resistance 5 ohms or less?
Yes
GO to BA6.

No
SERVICE Circuit 220 (P/O) for open. RESTORE vehicle. RETEST system.


BA6 CHECK CIRCUIT 217 (DB/O)
Disconnect headlamp time delay switch and light sensor amplifier .
Using an ohmmeter check continuity of Circuit 217 (DB/O) from headlamp time delay switch to light sensor amplifier .
Is resistance 5 ohms or less?
Yes
GO to BA7.

No
SERVICE Circuit 217 (DB/O) for open. RESTORE vehicle. RETEST system.


BA7 CHECK AUTOLAMP HEADLAMP TIME DELAY SWITCH
Using an ohmmeter connected to a known good ground, connect second lead to Circuit 217 (DB/O).
Measure resistance while rotating headlamp time delay switch from OFF to the full ON position.
Does resistance vary smoothly between 2.5 to 4.5 K-ohms and 140 to 260 K-ohms?
Yes
GO to BA8.

No
REPLACE headlamp time delay switch . RESTORE vehicle. RETEST system.


BA8 CHECK CIRCUIT 218 (W/P)
Gain access to autolamp dual coil relay as outlined.
Disconnect autolamp dual coil relay.
Using an ohmmeter, check continuity of Circuit 218 (W/P) from light sensor amplifier to autolamp dual coil relay connector.
Is resistance 5 ohms or less?
Yes
GO to BA9.

No
SERVICE Circuit 218 (W/P) for open. RESTORE vehicle. RETEST system.


BA9 CHECK SUPPLY TO AUTOMATIC HEADLAMP DIMMER RELAY
Using a test lamp connected to ground, check Circuit 195 (T/W) for voltage.
Did test lamp illuminate?
Yes
GO to BA10.

No
SERVICE Circuit 195 (T/W) for open. RESTORE vehicle. RETEST system.


BA10 CHECK HEADLAMP SWITCH INPUT TO AUTOLAMPS RELAY
Actuate headlamp switch to the ON position.
Using test lamp check Circuit 14 (BR) for voltage at autolamp dual coil relay connector.
Did test lamp illuminate?
Yes
GO to BA12.

No
GO to BA11.


BA11 CHECK HEADLAMP SWITCH
Using test lamp check Circuit 14 (BR) Pin R at headlamp switch connector.
Did test lamp illuminate?
Yes
SERVICE Circuit 14 (BR) for open. RESTORE vehicle. RETEST system.

No
REPLACE damaged headlamp switch . RESTORE vehicle. RETEST system.


BA12 CHECK CIRCUIT 15 (R/Y)
Using test lamp check Circuit 15 (R/Y) for voltage.
Did test lamp illuminate?
Yes
GO to BA13.

No
SERVICE Circuit 15 (R/Y) for open. RESTORE vehicle. RETEST system.


BA13 CHECK POTENTIOMETER OPERATION
Reconnect headlamp switch and autolamp dual coil relay.
Using an ohmmeter, connect one lead to Circuit 217 (DB/O) and connect second lead to Circuit 220 (P/O) at amplifier connector.
Measure resistance with control in maximum position.
Is resistance approximately 200,000 ohms?
Yes
REPLACE autolamp dual coil relay. RESTORE vehicle. RETEST system.

No
REPLACE headlamp time delay switch . RESTORE vehicle. RETEST system.
 

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Discussion Starter #4
Thanks guy's this should be very helpful.


Thanks again
 
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