QuestionQUESTION: We have a 2001 Pontiac Montana. At first, we don't have left turn signal and when brakes are applied, both the arrows light up on the instrument panel and the flasher is clicking faster than normal. My husband opened the left tail light and we found a melted connector and bad circuit board so we went and got new parts and replaced them. However, while my husband's connecting the wires...it sparked and when he's done repalcing the left tail connector and circuit board...all the signal lights quit working. We checked on the fuse and found a bad one so we replaced it but our turn signal just wont work. We thought it might be a problem with the turn signal flasher so we got a new flasher but our turn signal just wont work...we checked on the fuses and bulbs and everything's ok...i wonder if there's something we missed...we really need an advice...hope you can help us with this...
ANSWER: Hey there Phoebe:
Make sure all the fuses are good in the one on the side of the dash board on the right side. The fuses ate maked hazzard and t/signal. Did the connector get replaced. You said you bought the parts??? Make sure if the connector was replaced that the wires are in the right positions and none of the wires are crossed. do the 4 way flashers work? they use the same flasher module to run the t/signals and 4 way flashers. Good luck :}
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QUESTION: Yes, we did replaced the connector and we rechecked the fuses...everything's good. We also double checked the wiring to make sure none of the wires are crossed. We bought a new flasher and replaced the old flasher but it don't make any difference...the turn signal just wont work...it's giving us a really bad headache since we only have this vehicle right now and we really hate to spend money that we don't have on the dealership... is there anything else we need to do??? any more parts that we need to consider checking before getting an appointment to the dealership? Any more suggestions from you will be highly appreciated...
ANSWER: You didn't answer my previous question. do the 4 way flashers work? The 4 way flashers and t urn signals uses the same parts they just run the power to all 4 corners of the van instead of just the right or left side. If the 4 ways work take a look and see what corner of the van the lighst are not working on. If they don't work then we have to look further into the problem. Did you buy the correct flasher module? An original equipment one from the dealer or an aftermarket part?
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QUESTION: yes, we have a 4way flasher and we made sure that it was the right flasher when we got the part from NAPA auto parts. All the lights on the four corner of the van works expect for the turn signals. The emergency flashing light also works when checked it...we just dont have the turn signal...
AnswerTry this: you will have to sift through it it's the page out of the service manual but it's actually ina chart so it's a big jumbled.
Step
Action
Yes
No
Schematic Reference: Exterior Lights Schematics
1
Did you review the Exterior Lighting System Description and Operation and perform the necessary inspections?
Go to Step 2
Go to Symptoms - Lighting Systems
2
Turn ON the ignition, with the engine OFF.
Observe the turn signal lamps and indicators.
Place the turn signal switch in the LH and RH on position.
Do the turn signal lamps and indicators operate properly?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
Go to Step 3
3
Are all of the turn signals and indicators inoperative?
Go to Step 4
Go to Step 5
4
Observe the turn signal lamps and indicators.
Place the turn signal switch in the OFF position.
Place the hazard switch in the ON position.
Do the hazard lamps operate?
Go to Step 6
Go to Hazard Lamps Inoperative
5
Are only the turn signal indicators inoperative?
Go to Step 7
Go to Step 9
6
Using a test lamp connected to ground, backprobe the ignition 1 voltage circuit of the C201 connector that is fed by the T/SIG fuse.
Does the test lamp illuminate?
Go to Step 27
Go to Step 20
7
Place the ignition in the OFF position.
Disconnect the instrument panel cluster connector.
Place the ignition in the ON position.
Place the turn signal switch in the appropriate on position.
Probe the turn lamp supply voltage circuit of the instrument panel cluster connector with a test lamp that is connected to ground.
Does the test lamp illuminate?
Go to Step 8
Go to Step 34
8
Probe the ground circuit of the instrument panel cluster connector with a test lamp that is connected to battery voltage.
Does the test lamp illuminate?
Go to Step 25
Go to Step 33
9
Determine which of the following lamps are inoperative:
• Front turn signal lamp LH or RH
• Rear turn signal lamp LH or RH
• Mirror turn signal lamp LH or RH, if equipped
Is a front turn signal lamp inoperative?
Go to Step 16
Go to Step 10
10
Is a rear turn signal lamp inoperative?
Go to Step 13
Go to Step 11
11
Disconnect the inoperative mirror turn signal.
Probe between the supply voltage circuit and the ground circuit of inoperative mirror turn signal connector with a test lamp.
Place the turn signal switch in the RH or LH ON position.
Does the test lamp illuminate?
Go to Step 24
Go to Step 12
12
Probe the supply voltage circuit of inoperative mirror turn signal connector with a test lamp that is connected to ground.
Place the turn signal switch in the RH or LH ON position.
Does the test lamp illuminate?
Go to Step 31
Go to Step 32
13
Remove the inoperative rear turn signal lamp bulb.
Probe between the supply voltage circuit and the ground circuit of inoperative turn signal lamp bulb socket with a test lamp.
Place the turn signal switch in the RH or LH ON position.
Does the test lamp illuminate?
Go to Step 23
Go to Step 14
14
Disconnect the tail lamp connector.
Probe the turn signal supply voltage circuit of the tail lamp connector with a test lamp that is connected to ground.
Place the turn signal switch in the RH or LH ON position.
Does the test lamp illuminate?
Go to Step 15
Go to Step 22
15
With a test lamp that is connected to ground, probe between the turn signal supply voltage circuit and the ground circuit of the tail lamp connector.
Does the test lamp illuminate?
Go to Step 24
Go to Step 30
16
Disconnect the front turn signal lamp.
Probe the supply voltage circuit of the inoperative front turn signal lamp with a test lamp that is connected to a good ground.
Place the turn signal switch in the RH or LH ON position.
Does the test lamp illuminate?
Go to Step 17
Go to Step 18
17
Probe between the supply voltage circuit and the ground circuit of the inoperative front turn signal lamp with a test lamp.
Does the test lamp illuminate?
Go to Step 23
Go to Step 29
18
Place the ignition in the OFF position.
Disconnect the Daytime Running Lamps (DRL) control module connector.
Turn ON the ignition, with the engine OFF.
Probe the turn signal switch signal circuit of Daytime Running Lamps (DRL) control module connector with a test lamp that is connected to a good ground.
Place the turn signal switch in the RH or LH ON position.
Does the test lamp illuminate?
Go to Step 19
Go to Step 21
19
Connect a fused jumper between the turn signal switch signal circuit and the turn signal supply voltage circuit of the daytime running lamps control module. Refer to Circuit Testing in Wiring Systems.
Place the turn signal switch in the RH or LH ON position.
Probe the supply voltage circuit of inoperative front turn signal lamp with a test lamp that is connected to a good ground.
Does the test lamp illuminate?
Go to Step 26
Go to Step 28
20
Test for an open or high resistance in the ignition 1 supply voltage circuit of the turn signal switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 41
Go to Step 35
21
Test for an open or high resistance in the turn signal switch signal circuit of the Daytime Running Lamps (DRL) control module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 41
Go to Step 27
22
Test for an open or high resistance in the turn signal supply voltage circuit of the inoperative rear turn signal. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 41
Go to Step 27
23
Inspect for poor connections at the inoperative turn signal lamp bulb socket. 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 41
Go to Step 39
24
Inspect for poor connections at the harness connector of the tail lamp or mirror turn signal. 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 41
Go to Step 38
25
Inspect for poor connections at the harness connector of the instrument panel cluster. 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 41
Go to Step 40
26
Inspect for poor connections at the harness connector of the daytime running lamps control module. 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 41
Go to Step 36
27
Inspect for poor connections at the harness connector of the turn signal 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 41
Go to Step 37
28
Repair an open or high resistance in the supply voltage circuit of the front turn signal. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 41
--
29
Repair an open or high resistance in the ground circuit of the front turn signal. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 41
--
30
Repair an open or high resistance in the ground circuit of the tail lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 41
--
31
Repair an open or high resistance in the ground circuit of the inoperative mirror turn signal. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 41
--
32
Repair an open or high resistance in the turn signal supply voltage circuit of the inoperative mirror turn signal. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 41
--
33
Repair an open or high resistance in the ground circuit of the inoperative turn signal indicator. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 41
--
34
Repair an open or high resistance in the supply voltage circuit of the inoperative turn signal indicator. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 41
--
35
Repair the short to ground in the ignition 1 supply voltage circuit of the turn signal switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 41
--
36
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 41
37
Replace the turn signal switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle .
Did you complete the repair?
Go to Step 41
--
38
Replace the inoperative turnlamp. Refer to the appropriate procedure:
• Tail Lamp Replacement
• Power Mirror Replacement
Did you complete the repair?
Go to Step 41
--
39
Replace the inoperative turn signal bulb.
Did you complete the repair?
Go to Step 41
--
40
Replace the Instrument Cluster Panel (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console.
Did you complete the repair?
Go to Step 41
--
41
Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 2
I can't copy the wiring diagram to this. It's a lot jumbled sorry.
My guess is that you either missing power to the turn siganl switch or the turn signal switch is bad or that flasher module you got was incorrect or is bad. It's one of those 3 options.. Withoiut seeing it it's hard to say for sure. Good luck :}
