Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information in 2005 C/K Truck Service Manual |
2 | Using a DMM, measure the voltage across the 24V battery terminals. Is the voltage between the specified voltage? | 18.0-28.5 V | Go to Step 3 | Go to Battery Inspection/Test |
3 |
Is the voltage greater than the specified voltage? | 7 V | Go to Step 4 | Go to Step 6 |
4 | Using a DMM, measure the voltage from the BATT terminal and ground. Is the voltage greater than the specified voltage? | 7 V | Go to Step 5 | Go to Step 7 |
5 | Connect a test lamp between ground terminal of the generator and battery negative. Does the test lamp illuminate? | -- | Go to Step 8 | Go to Step 10 |
6 | Connect a test lamp between terminal 30 of the 24V relay and ground. Does the test lamp illuminate? | -- | Go to Step 9 | Go to Step 11 |
7 | Repair the generator voltage circuit for an open or high resistance. Did you complete the repair? | -- | Go to Step 17 | -- |
8 | Test the generator ground circuit for an open or high resistance. Did you find and correct the condition? | -- | Go to Step 17 | Go to Step 10 |
9 | Repair the generator field circuit for an open or high resistance. Did you complete the repair? | -- | Go to Step 17 | -- |
10 | Replace the generator. Refer to 24V Generator Replacement. Did you complete the replacement? | -- | Go to Step 17 | -- |
11 | Connect a test lamp between terminal 85 and ground. Did the test lamp illuminate? | -- | Go to Step 12 | Go to Step 14 |
12 | Connect a test lamp between terminal 86 and ground. Did the test lamp illuminate? | -- | Go to Step 16 | Go to Step 14 |
13 | Repair the 24V relay control voltage circuit for an open or high resistance. Did you complete the repair? | -- | Go to Step 17 | -- |
14 | Connect a test lamp between terminal 87 of the 24V relay and ground. Did the test lamp illuminate? | -- | Go to Step 15 | Go to Step 13 |
15 | Replace the 24V relay. Refer to Relay Replacement - 24V Generator. Did you complete the replacement? | -- | Go to Step 17 | -- |
16 | Repair the 24V relay ground control circuit for an open or high resistance. 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 |
