Do not connect aftermarket accessories into the following circuits:
Caution: Refer to SIR Caution in the Preface section.
| • | SIR circuits, all such circuits are indicated on circuit diagrams with the SIR
symbol. |
| • | Always check for aftermarket accessories as the first step in diagnosing
electrical conditions. If the vehicle is so equipped, disconnect the aftermarket system
to verify that these add-on accessories are not the cause of the customer concern. |
Possible causes of vehicle conditions related to aftermarket accessories include:
| • | Power feeds connected to points other than the battery. |
| • | Transceiver wiring located too close to vehicle electronic modules or
wiring. |
| • | Poor shielding or poor connectors on antenna feed line. |
| • | Check for recent service bulletins detailing installation guidelines for
aftermarket accessories. |
