Definition: No left turn indicator output at the trailer connector.

1. Place the turn signal switch in the Left turn position.
2. Remove the Left Trailer Turn Relay from the socket in Relay Center #1.
3. Connect a test lamp between terminal 86 in the Left trailer turn relay socket and the chassis ground.

Does the test lamp flash?

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Go to Step 2

Go to Step 3

Connect a test lamp between terminal 85 and terminal 86 in the Left trailer turn relay socket.

Does the test lamp flash?

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Go to Step 4

Go to Step 5

Repair the open in CKT 118 (LT BLU) between S259 and terminal 86 in the Left trailer turn relay socket.

Is the repair complete?

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System OK

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Connect a test lamp between terminal 85 and terminal 30 in the Left trailer turn relay socket.

Does the test lamp light?

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Go to Step 6

Go to Step 7

Repair the open in CKT 22, CKT 117 or CKT 650 (BLK) between G105 and terminal 85 in the Left trailer turn relay socket.

Is the repair complete?

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System OK

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1. Connect a jumper between terminal 30 and terminal 87 in the Left trailer turn relay socket.
2. Connect a test lamp between terminal 1 and terminal 3 in the trailer connector socket.

Does the test lamp light?

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Go to Step 8

Go to Step 9

Repair the open in CKT 115 (DK GRN) between circuit breaker #11 and terminal 30 in the Left trailer turn relay socket.

Is the repair complete?

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System OK

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Replace the Left trailer turn relay.

Is the repair complete?

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System OK

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Repair the open in CKT 116 or CKT 318 (YEL) between the trailer connector socket and terminal 87 in the Left trailer turn relay socket.

Is the repair complete?

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System OK

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