For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 |

1. Inspect the auxiliary power user's insertion element, if possible.
2. Disconnect the connector at the auxiliary power outlet.
3. Connect an unpowered test lamp between the fused ouput-battery circuit and ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 2

2 | Repair the open in the fused ouput-battery circuit between the IP fuse block and the auxiliary power outlet. Did you find and correct the condition? | -- | System OK | --
3 | Using a Digital Multimeter, test the ground circuit at the auxiliary outlet for an open. Is ground present? | -- | Go to Step 4 | Go to Step 5
4 | Replace the auxiliary power outlet. Did you find and correct the condition? | -- | System OK | --
5 | Repair the open in the ground circuit between the auxiliary power outlet and ground. Did you find and correct the condition? | -- | System OK | --