Turn signal/dimmer switch repair,dimmer switch does not detent. is it repairable or only relaceable. mr. signal

Low Beam System Operation
The headlamps may be turned on two different ways. First, when the end of the of the turn signal/headlamp switch lever is turned to the second detent position, the headlamps will illuminate. A ground signal is provided to the DRL control module. The module then provides a ground path to the coils of the HLP relay. Since the head relay is provided with battery voltage to both the contacts and the coil, the coil becomes energized and closes the contacts providing voltage to the DIM relay. With voltage and ground provided, the low beam lamps light. Second, with the switch in the OFF position, for automatic lamp control (ALC). During ALC the headlamps will be in one of the following modes of operation:
• Daytime running lamp (DRL) operation in daylight conditions, refer to DRL below for the operation of the circuit.
• Low beam headlamp operation in low light conditions. When the ambient light sensor senses a low light condition for approximately 15 seconds, it will cancel DRL operation and turn on the headlamps at 100 percent intensity. A path to ground is provided to the coil of the HLP relay. With a direct path to ground provided to the headlamps though the DRL control module, the headlamps will light at 100 percent intensity.
High Beam System Operation
The high-beam headlamp operation is controlled using the turn signal/headlamp switch lever on the steering column. In order to change headlamp operation from low-beam to high-beam, push the switch lever toward the instrument panel (until the detent is felt) and release. With the switch lever in the high beam position, ground is provided to the DRL control module through the turn signal/headlamp switch and splice pack 200 to G200. The DRL control module provides a ground to the coil of the dimmer relay. Since voltage is being applied to the dimmer relay coil, it becomes energized. Voltage is then applied through the closed contacts of the dimmer relay and the to the high beam lamps in the headlamps. Since ground is provided to the headlamps through the closed contacts of the energized DIM relay, the high beam lamps light. The high-beam indicator (blue) in the instrument cluster will light during high-beam headlamp operation. In order to change headlamp operation back to low-beam operation, pull the turn signal switch lever toward the driver (until the detent is felt) and release.Your best bet , take it to a qualified repair shop.

Headlights Circuit Description
The headlights are controlled by the body control module (BCM) via the AHL Relay when the headlamp and panel dimmer switch is the AUTO position. When in the AUTO mode, the BCM receives a signal, (voltage) from the ambient light sensor, based on the voltage of the signal of n the sensor the BCM turns the day time running lamp (DRL) lights OFF and the headlights ON. The headlights can also be turned on by placing the headlamp and panel dimmer switch in the head position.
The relay coil is fed by the headlamp and panel dimmer switch or the BCM and the battery B+ buss bar in the underhood bussed electrical center (UBEC). The BCM supplies current to the relay based on the input from the ambient light sensor via CKT 352.
The relay output feeds the LT HDLP and RT HDLP fuses to supply current to the low and high beam lamps on CKT 1340 and CKT 1240. The ground for both the low and high beam lamps is supplied via CKT 524 and CKT 525 to the dimmer switch. The dimmer switch uses CKT 1850 for a ground to G203.
Some circuits are monitored by the BCM, and upon failure may set a DTC.
Park/Side Marker and Tail Lamps
The park/side marker and tail lamps are split between the following 4 fuses:
?€¢
The FR PRK

?€¢
The LR PRK

?€¢
The RR PRK

?€¢
The TRL PRK

These fuses receive voltage from the park lamp relay. When the headlamp and panel dimmer switch is in the auto position, the body control module (BCM) controls the relay by grounding CKT 1080 based on the input of the ambient light sensor. The park LPS fuse supplies battery positive voltage (B+) to the relay at all times.
When the headlamp and panel dimmer switch is in the PARK position, the relay is by passed through the INT PRK fuse. Current flows from the PARK LPS fuse through the headlamp and panel dimmer switch to the INT PRK fuse in order to feed the following fuses:
?€¢
The FR PRK

?€¢
The LR PRK

?€¢
The RR PRK

?€¢
The TRL PRK

Park Lamps Inoperative

Step

Action

Value(s)

Yes

No

1

1. Turn the ignition OFF.
2. Connect a scan tool.
3. Turn the ignition to the ON position.
4. Using the scan tool, check for any DTCs in the body control module (BCM).

Does the scan tool show any DTCs ?
--
Go to Diagnostic System Check - Body Control System in Body Control System
Go to Step 2

2

1. Turn the headlamp switch to the park position.
2. Connect a test lamp from (back probe) terminal B of the headlamp and panel dimmer switch to ground.

Does the test lamp light?
--
Go to Step 4
Go to Step 3

3

Locate and repair the open in CKT 240 (ORN) between the switch and the mid bussed electrical center (MBEC).

Is the repair complete?
--
System OK
--

4

Connect a test lamp from (back probe) terminal A of the headlamp and panel dimmer switch to ground.

Does the test lamp light?
--
Go to Step 6
Go to Step 5

5

Replace the headlamp and panel dimmer switch. Refer to Headlamp Switch Replacement .

Is the repair complete?
--
System OK
--

6

Connect a test lamp from the INT PRK fuse, located in the left bussed electrical center (LBEC), to ground.

Does the test lamp light?
--
Go to Step 7
Go to Step 8

7

Locate and repair the open in CKT 74 (LT BLU) between the MBEC and the UBEC.

Is the repair complete?
--
System OK
--

8

Locate and repair the open in CKT 74 (LT BLU) between the headlamp and the panel dimmer switch and the LBEC.

Is the repair complete?
--
System OK

Two fuses HDLP L fuse #36 15amp & HDLP R fuse #32 15amp ,located in the under hood fuse / relay box. One is for Left - low an high beams an the other is for right side low an high beams . What's wrong , no high beams ?
Headlamps Inoperative - High Beams

1

Did you perform the Lighting System Diagnostic System Check?
Go to Step 2
Go to Diagnostic System Check - Lighting Systems

2

1. Turn the ignition to the OFF position.
2. Turn the headlamp switch to the HEAD position.
3. Place the headlamp dimmer switch in the high beam position.

Are the high beam headlamps operating properly?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
yes Go to Step 3


Is only one high beam headlamp inoperative?
yes Go to Step 7
Go to Step 4

4

Place the headlamp dimmer switch in the flash to pass position.
Do the high beam headlamps operate in the flash to pass position?
Go to Step 13 yes
Go to Step 5 no

5

Place the headlamp dimmer switch in the high beam position.
Does the high beam indicator illuminate?
Go to Step 12
Go to Step 6

6

Test for a high resistance, an open or a short to battery positive voltage in the high beam signal circuit of the headlamp dimmer switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 13

7

1. Disconnect the inoperative headlamp.
2. Using a test lamp connected to ground, probe the battery positive voltage circuit of the inoperative high beam headlamp.

Does the test lamp illuminate?
Go to Step 8
Go to Step 9

8

Connect a test lamp between the headlamp high beam signal circuit and the battery positive voltage circuit of the inoperative high beam headlamp.
Does the test lamp illuminate?
Go to Step 11
Go to Step 10

9

Test for a high resistance or an open in the battery positive voltage circuit of the inoperative headlamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 12

10

Test for a high resistance or an open in the headlamp high beam signal circuit of the inoperative high beam headlamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 12

11

Inspect for poor connections at the harness connector of the inoperative headlamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 14

12

Inspect for poor connections at the harness connector of the fuse block - underhood. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 15

13

Inspect for poor connections at the harness connector of the headlamp dimmer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 16

14

Replace the inoperative headlamp. Refer to Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement .
Did you complete the repair?
Go to Step 17
--

15

Replace the fuse block - underhood. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems.
Did you complete the repair?
Go to Step 17
--

16

Replace the headlamp dimmer switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column.
Did you complete the repair?
Go to Step 17
--

17

Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 2

To exact step by step procedure to replace turn signal switch on your car.lease click on the following link mentioned below:--- http://technoanswers.blogspot.com/2011/03/how-to-relace-turn-signal-switch-on.html ---------------- This should help.Thanks.Helpmech.

Factory repair manual step by step testing procedure for Interior Backlighting Inoperative. In your course of testing let me know if you need location for anything .

2
Turn ON the parklamps.
Ensure the panel dimmer switch is at maximum illumination.
Do the illumination lamps operate normally?
YES - Go to Testing for Electrical Intermittents in Wiring Systems
NO - Go to Step 3
3
Is only one lamp inoperative?
YES - Go to Step 4
NO - Go to Step 6
4
Test the instrument panel lamp supply voltage circuit of the inoperative lamp for high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 17
NO - Go to Step 5
5
Test the ground circuit of the inoperative lamp for high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 17
NO - Go to Step 11
6
Do the park lamps function properly?
YES - Go to Step 7
NO - Go to Park Lamps Inoperative
7
Inspect the ILLUM fuse.
Is the fuse open?
YES - Go to Step 12
NO - Go to Step 8
8
Ensure the panel dimmer switch is at maximum illumination.
Connect a test lamp between the ILLUM fuse and ground.
Does the test lamp illuminate?
YES - Go to Step 14
NO - Go to Step 9
9
without disconnecting the switch, connect a test lamp between the instrument panel lamps dimmer switch signal circuit at the headlamp and panel dimmer switch and ground.
Does the test lamp illuminate?
YES - Go to Step 13
NO - Go to Step 10
10
Inspect for poor connections at the harness connector of the headlamp and panel dimmer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 17
NO - Go to Step 16
11
Inspect for poor connections at the harness connector of the inoperative bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 17
NO - Go to Step 15
12
Repair the short to ground in the instrument panel lamp supply voltage circuit. Refer to Wiring Repairs in Wiring Systems.
Replace the fuse.
YES - Did you complete the repair?
NO - Go to Step 17
--
13
Repair the open in the instrument panel lamps dimmer switch signal circuit between the switch and the fuse. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 17
--
14
Repair the open in the instrument panel lamp supply voltage circuit. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 17
--
15
Replace the inoperative bulb.
Did you complete the replacement?
Go to Step 17
--
16
Replace the headlamp and panel dimmer switch. Refer to Headlamp Switch Replacement .
Did you complete the replacement?
Go to Step 17
--
17
Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 3

1. If equipped with an air bag, disable the system as outlined in of this repair guide.
2. If not done already, disconnect the negative battery cable.
3. Remove the steering wheel, as outlined earlier in this section.
4. Remove the shaft lock cover.
5. Remove the shaft lock retaining ring using a suitable lock plate compressor tool to press down the shaft lock. Dispose of the ring.
6. Remove the shaft lock.
7. Remove the turn signal canceling cam assembly.
8. Remove the upper bearing spring.
9. Remove the thrust washer.
10. Move the turn signal lever up, into the "right turn" position.
11. Remove the multi-function lever.
12. Remove the turn signal switch arm retaining screw.
13. Remove the turn signal switch screws and let the switch hang freely.
14. Remove the key from the lock cylinder set.
15. Remove the buzzer switch assembly.
16. Reinsert the key in the lock cylinder.
17. Turn the key to the LOCK position.
18. Remove the lock retaining screw and remove the lock cylinder.
19. If equipped with cruise control, remove the housing cover end cap, unplug the cruise control connector and gently pull through the shroud, bowl, and steering column housing assembly.
20. Remove the washer head screw, the hex nut and dimmer switch.
21. Remove the mounting stud and ignition switch.
22. 1. If equipped with cruise control, gently pull the connector through the steering column housing assembly, bowl and shroud and connect the plug.
    2. Install the housing cover end cap and screw and tighten to 17 inch lbs. (1.9 Nm).
    3. Install the ignition switch and mounting stud and tighten the stud to 35 inch lbs. (4.0 Nm). Adjust the ignition switch by moving the switch slider to the extreme left position and then move the slider 1 detent to the right (off lock).
    
    See Figure 1
    
    
    Fig. Fig. 1: Ignition switch adjustment procedure
    
    1. Install the dimmer switch hex nut, screw, and tighten to 35 inch lbs. (4.0 Nm). Adjust the dimmer switch.
    2. To adjust the dimmer switch, depress the switch slightly to allow insertion of a 3 / 32 in. drill bit into the hole above the actuator rod. Force the switch upward then tighten the screw.
    
    See Figure 2
    
    
    Fig. Fig. 2: Dimmer switch adjustment procedure
    
23. Install the switch using the original screws. Use of screws that are too long could prevent the column from collapsing on impact.
24. Install the lock cylinder and retaining screws and tighten to 40 inch lbs. (4.5 Nm).
25. Turn the key to the RUN position.
26. Install the buzzer switch assembly.
27. Install the turn signal switch and retaining screws and tighten to 31 inch lbs. (3.5 Nm).
28. Install the wire protector shield.
29. Install the turn signal switch arm and retaining screw and tighten to 29 inch lbs. (2.3 Nm).
30. Install the hazard knob assembly.
31. Install the multi-function lever.
32. Install the thrust washer and upper bearing spring.
33. Lubricate with synthetic grease and install the turn signal canceling cam assembly.
34. Install the shaft lock.
35. Install a new shaft lock retaining ring. Align it to the block tooth on the shaft, using a lock plate compressor tool to press down the shaft lock.
36. Install the shaft lock cover.
37. Install the steering wheel, as outlined earlier in this section.
38. Connect the negative battery cable. If equipped, enable the air bag system as outlined in of this repair guide.

See Figure 1


Fig. Fig. 1: Ignition switch assembly
If equipped with an air bag system, make certain to follow the recommended disarming procedure before, and rearming procedure after, repairs.

1. Disconnect the negative battery cable and disable the air bag system, if equipped.
2. Remove the column to instrument panel trim plates and attaching nuts.
3. Lower the steering column and disconnect the shift indicator cable.
4. Disconnect the ignition and dimmer switch wire connectors.

The steering column must be supported at all times to prevent damage.

1. Remove the switch attaching screws and remove the dimmer switch followed by the ignition switch.

To install:

1. Move the key lock to the LOCK position.
2. Move the actuator rod hole in the switch to the LOCK position.
3. Install the switch with the rod in the hole. Adjust the ignition switch as follows:
   1. 1990 - Place a 3/32 inch drill bit in the hole on the switch to lock the switch into position. Move the switch slider to the extreme left position then move the slider 1 detent to the right OFF LOCK position. Remove the drill bit.
   2. 1991-93 - Install the ignition switch in the LOCK position. Move the switch slider to the extreme right position and move the slider 1 detent to the left LOCK position. Depress switch mechanism slightly to insert a 3/32 inch drill bit into ignition switch.
   
   
4. Position and reassemble the steering column in reverse of the disassembly following the proper coil centering procedure. Enable the air bag system, if equipped, as follows:
   1. Connect the yellow 2-way SIR harness connector located at the base of the steering column.
   2. Install the SIR fuse to the fuse block.
   3. Turn the ignition switch to RUN and verify the inflatable restraint indicator flashes 7-9 times and then turns off.
   
   

Next to the headlight switch is a dimmer dial for the interior dash lights... if you turn it all the way up, the interior lights remain on... there is a "detent" on the dimmer. turn the interior dash lights all the way full on ...you'll feel the detent, then turn it down back past the detent a little bit...that should cancel the interior courtesy lights... wait a bit because the interior lights are sometimes on delay timers....
good luck let me know what happens.

This Outlines Removal Of Both LOCK CYLINDER<< Mechanical)) And The Ignition SWITCH ITSELF<< ELECTRICAL))

1. Remove steering wheel as outlined previously.
2. Remove turn signal switch as outlined in ``Turn Signal Switch, Replace'' procedure.
3. Place ignition switch in ``Run'' position, then remove lock cylinder retaining screw and lock cylinder.
4. To install, rotate lock cylinder to stop, while holding housing as shown, Fig. 6. Align cylinder key with keyway in housing, then push lock cylinder assembly into housing until fully seated.
5. Install lock cylinder retaining screw. Torque screw to 40 inch lbs. for standard columns, or 22 inch lbs. for adjustable columns.
6. Install buzzer switch, turn signal switch and steering wheel

CABALLERO, EL CAMINO, C, K, R, V & 1986---87 G MODELS
The ignition switch is mounted on top of the mast jacket inside the brake pedal support and is actuated by a rod and rack assembly.

1. Disconnect battery ground cable.
2. Disconnect and lower steering column. On some models, it may be necessary to remove the upper column mounting bracket if it hinders servicing of switch. Use extreme care when lowering steering column to prevent damage to column assembly. Only lower steering column a sufficient distance to perform ignition switch service.
3. On Caballero and El Camino, rotate ignition lock to ``Off'' unlocked position.
4. On C, K, R and V models, rotate ignition lock to ``Off'' locked position.
5. If lock cylinder has been removed, pull switch actuator rod up to stop, then pushrod down to second (Caballero or El Camino) or first (C, K, R and V models) detent as shown, Fig. 7.
6. Remove column mounted dimmer switch, if equipped, then remove switch retaining screws and switch.
7. Reverse procedure to install, noting the following:

1. Place gear shift lever in neutral.
2. Place lock cylinder and switch in positions noted in steps 3 and 4.
3. Fit actuator rod into hole in switch slider and secure switch with retaining screws, ensuring switch does not move out of detent.
4. Install and adjust dimmer switch, if equipped, as outlined in ``Column Mounted Dimmer Switch, Replace'' procedure.
5. Torque retaining screws to 35 inch lbs., then check switch operation.

My son came down and figured it out for me. Not sure what all he did but he had to make a few modifications by splicing the wires together after cutting the wires just under the dimmer switch...then a few adjustments were needed to get it to all work right.
Thanks