Turn Signal Lamps
The turn signal lamps are made up of the front park/turn signal lamps and rear turn signal lamps. The front turn signal lamps flash with the rear turn signal lamps when a turn is initiated using the turn signal/multifunction lever. The turn signals will operate only with the ignition switch in the RUN position and will not operate during hazard flasher operation.
When the ignition is turned to the RUN position, battery voltage is supplied to the TURN SIGNAL, CORN LPS Fuse. Battery voltage is then applied through the TURN SIGNAL, CORN LPS fuse circuit to the hazard warning switch. The hazard switch supplies a turn signal flasher signal to the turn signal switch. With the turn signal switch in the LH or RH position the corresponding turn signal indicator, rear turn signal, and front turn signal receive the turn signal switch signal and will flash. The front turn signals receive the turn signal switch signal from the turn signal switch via the body control module (BCM) . The front turn lamps are grounded at G101. The rear turn lamps are grounded at G301 and G302.
Turn Signal Lamps and/or Indicators Inoperative
2
- Turn the ignition switch to the ON position.
- Place the turn signal switch in the LH and RH on position.
Do the turn signals operate properly?
Go to Testing for Intermittent Conditions and Poor Connections yes
Go to Step 3 no
3
Are all of the turn signal lamps and indicators inoperative?
Go to Step 5 yes
Go to Step 4 no
4
Are only the turn signal indicators inoperative?
Go to Step 16 yes
Go to Step 9 no
5
Check the TURN SIGNALS CORN LPS fuse for an open.
Is the TURN SIGNALS CORN LPS fuse open?
Go to Step 25 yes
Go to Step 6 no
6
- Disconnect the hazard switch.
- Turn the ignition to the ON position, with the engine OFF.
- Connect a test lamp between the ignition positive 1 voltage circuit of the hazard switch and a good ground.
Does the test lamp illuminate?
Go to Step 7 yes
Go to Step 27 no
7
Connect a test lamp between the ignition 1 positive supply voltage circuit of the hazard switch and the ground circuit of the hazard switch .
Does the test lamp illuminate?
Go to Step 8 yes
Go to Step 23 no
8
- Install a fused jumper between the ignition 1 positive voltage circuit of the hazard switch and the turn signal flasher signal circuit of the hazard switch.
- Place the turn signal switch in the RH on position and the LH on position.
Do the turn signal lamps illuminate?
Go to Step 17 yes
Go to Step 15 no
9
Is a front turn signal inoperative?
Go to Step 10 yes
Go to Step 13 no
10
- Turn the ignition switch to the ON position.
- Disconnect the inoperative front turn signal lamp.
- Connect a test lamp between the supply voltage circuit of the inoperative front turn signal lamp and a good ground.
- Place the turn signal switch in the appropriate ON position.
Does the test lamp flash ON and OFF?
Go to Step 14 yes
Go to Step 11 no
11
- Disconnect the body control module (BCM) connector.
- Connect a test lamp between ground and the front turn signal switch signal circuit of the BCM.
- Place the turn signal switch in the appropriate ON position.
Does the test lamp flash ON and OFF?
Go to Step 12
Go to Step 22
12
Test for an open or for a high resistance in the supply voltage circuit of the inoperative front turn signal lamp. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Go to Step 34
Go to Step 21
13
- Turn the ignition switch to the ON position.
- Disconnect the inoperative rear turn signal lamp.
- Connect a test lamp between the supply voltage circuit of the inoperative turn signal lamp and a good ground.
- Place the turn signal switch in the appropriate ON position.
Does the test lamp flash ON and OFF?
Go to Step 14
Go to Step 28
14
Connect a test lamp between the ground circuit of the inoperative turn signal lamp and supply voltage circuit of the inoperative turn signal lamp.
Does the test lamp illuminate?
Go to Step 20
Go to Step 26
15
Test for an open or high resistance in the turn signal flasher signal circuit. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Go to Step 34
Go to Step 18
16
- Turn OFF the ignition.
- Disconnect the instrument panel cluster (IPC).
- Connect a test lamp between the supply voltage circuit of the inoperative turn signal indicator and the instrument panel cluster (IPC) ground circuit.
- Place the turn signal switch in the appropriate ON position.
Does the test lamp flash ON and OFF?
Go to Step 19
Go to Step 24
17
Inspect for poor connections at the harness connector of the hazard switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?
Go to Step 34
Go to Step 30
18
Inspect for poor connections at the turn signal switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?
Go to Step 34
Go to Step 29
19
Inspect for poor connections at the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?
Go to Step 34
Go to Step 31
20
Inspect for poor connections at the inoperative turn signal lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?
Go to Step 34
Go to Step 32
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