Headlamp Low or High Beams Always On. Chevrolet Venture Ext. 2003

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2003 🢒 Venture Ext. 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Headlamp Low or High Beams Always On

Headlamp Low or High Beams Always On Domestic

Step	Action	Yes	No
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems.
1	Did you perform the Lighting System Diagnostic System Check?	Go to Step 2	Go to Diagnostic System Check - Lighting Systems
2	Turn the ignition switch to the OFF Position. Turn the headlamp switch to the OFF Position. Place the headlamp dimmer switch in the LOW Position. Place the headlamp dimmer switch in the HIGH Position. Are any of the headlamps illuminated?	Go to Step 5	Go to Step 3
3	Turn the ignition switch to the RUN Position. Expose the ambient light sensor a bright incandescent light. Turn the headlamp switch to the OFF Position. Are any of the headlamps illuminated?	Go to Step 4	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
4	Are the daytime running lamps illuminated?	Go to Step 17	Go to Daytime Running Lamps (DRL) Inoperative
5	Did both the low beam headlamps and high beam headlamps illuminate?	Go to Step 7	Go to Step 6
6	Are the low beam headlamps illuminated at all times?	Go to Step 11	Go to Step 9
7	Disconnect the Daytime Running Lamp (DRL) control module connector C2. Are the headlamps illuminated?	Go to Step 10	Go to Step 8
8	Disconnect the daytime running lamp module C1. Using a test lamp connected to battery positive voltage, probe the RKE activation input circuit of the daytime running lamp module. Does the test lamp illuminate?	Go to Step 14	Go to Step 17
9	If the high beam headlamps are illuminated, remove the headlamp circuit breaker. Are the high beam headlamps illuminated?	Go to Step 12	Go to Step 15
10	Disconnect the headlamp switch. Are the headlamps illuminated?	Go to Step 13	Go to Step 16
11	Test for a short to battery positive voltage in the headlamp low beam supply voltage circuits. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	Go to Step 18
12	Test for a short to battery positive voltage in the headlamp high beam supply voltage circuits. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	Go to Step 18
13	Repair a short to battery positive voltage in the headlamp supply voltage circuit of the headlamp switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 19	--
14	Repair a short to ground in the RKE activation circuit of the daytime running lamps module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 19	--
15	Replace the turn signal switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the repair?	Go to Step 19	--
16	Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the repair?	Go to Step 19	--
17	Replace the Daytime Running Lamp (DRL) control module . Refer to Daytime Running Lights (DRL) Control Module Replacement . Did you complete the repair?	Go to Step 19	--
18	Replace the junction block - underhood. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems. Did you complete the repair?	Go to Step 19	--
19	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

Headlamp Low or High Beams Always On Export

Step	Action	Yes	No
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems.
1	Did you perform the Lighting System Diagnostic System Check?	Go to Step 2	Go to Diagnostic System Check - Lighting Systems
2	Turn the ignition switch to the OFF position. Turn the headlamp switch to the OFF position. Place the headlamp dimmer switch in the LOW position. Place the headlamp dimmer switch in the HIGH position. Are any of the headlamps illuminated?	Go to Step 3	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3	Did both the low beam headlamps and high beam headlamps illuminate?	Go to Step 7	Go to Step 4
4	Are the low beam headlamps illuminated at all times?	Go to Step 5	Go to Step 6
5	Disconnect the Daytime Running Lamp (DRL) control module connector C2. Are the low beam headlamps illuminated?	Go to Step 8	Go to Step 21
6	If the high beam headlamps are illuminated, remove the HEAD LAMP circuit breaker. Are the headlamp high beams illuminated?	Go to Step 12	Go to Step 19
7	Disconnect the headlamp switch. Are the headlamps illuminated?	Go to Step 16	Go to Step 20
8	Remove the LH HEAD LP LOW fuse. Is the LH low beam headlamp illuminated?	Go to Step 10	Go to Step 9
9	Remove the RH HEAD LP LOW fuse. Is the low beam - RH headlamp illuminated?	Go to Step 11	Go to Step 17
10	Test for a short to battery positive voltage in the supply voltage circuit of the LH low beam headlamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 23	Go to Step 22
11	Test for a short to battery positive voltage in the supply voltage circuit of the RH low beam headlamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 23	Go to Step 22
12	Remove the LH HEAD LP HIGH fuse. Is the LH low beam headlamp illuminated?	Go to Step 14	Go to Step 13
13	Remove the RH HEAD LP HIGH fuse. Is the low beam - RH headlamp illuminated?	Go to Step 15	Go to Step 18
14	Test for a short to battery positive voltage in the supply voltage circuit of the LH high beam headlamp . Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 23	Go to Step 22
15	Test for a short to battery positive voltage in the supply voltage circuit of the RH high beam headlamp . Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 23	Go to Step 22
16	Repair a short to battery positive voltage in the headlamp supply voltage circuit of the headlamp switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 23	--
17	Repair a short to battery positive voltage in the headlamp low beam supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 23	--
18	Repair a short to battery positive voltage in the headlamp high beam supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 23	--
19	Replace the turn signal switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the repair?	Go to Step 23	--
20	Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the repair?	Go to Step 23	--
21	Replace the Daytime Running Lamps (DRL) control module. Refer to Daytime Running Lights (DRL) Control Module Replacement . Did you complete the repair?	Go to Step 23	--
22	Replace the junction block - underhood. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems. Did you complete the repair?	Go to Step 23	--
23	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2