Inspect fuse Ef28

Is fuse Ef28 open?

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Go to Step 2

Go to Step 3

1. Inspect for a short circuit and repair it, if necessary.
2. Replace the open fuse.

Is the repair complete?

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System OK

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1. Turn the lamp switch ON.
2. Use a voltmeter to measure the voltage at fuse Ef28.

Does the battery voltage measure within the specified value?

11-14 V

Go to Step 5

Go to Step 4

Repair the open power supply circuit to fuse Ef28.

Is the repair complete?

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System OK

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Use an ohmmeter to measure the resistance between ground and the BK wire of the dimmer control switch connector.

Is the resistance equal to the specified value?

0 ohms

Go to Step 7

Go to Step 6

Repair the open ground circuit.

Is the repair complete?

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System OK

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1. Turn the lamp switch ON.
2. Use a voltmeter to measure the battery voltage at the BN/WH wire of the dimmer control switch connector.

Does the battery voltage measure within the specified range?

11-14 V

Go to Step 9

Go to Step 8

Repair the open circuit between the BN/WH wire of the dimmer control switch connector and fuse EF28.

Is the repair complete?

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System OK

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1. Disconnect the dimmer control switch.
2. Turn the lamp switch ON.
3. Use a voltmeter to measure the battery voltage at the D-GN wire of the dimmer control switch connector.

Does the battery voltage measure within the specified range?

11-14 V

Go to Step 11

Go to Step 10

Repair the open circuit between the D-GN wire of the dimmer control switch connector switch connector and each lamps.

Is the repair complete?

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System OK

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Replace the dimmer control switch.

Is the repair complete?

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System OK

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