Checking Aftermarket Accessories
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
Do not connect aftermarket accessories into the following circuits:
WARNING:
Refer to SIR HANDLING CAUTION
.
- SIR circuits, all such circuits are indicated on circuit diagrams with the SIR symbol.CAUTION: Refer to OBDII SYMBOL DESCRIPTION NOTICE .
- OBD II circuits, all such circuits are indicated on circuit diagrams with the OBD II symbol.
Always check for aftermarket accessories (non-OEM) as the first step in diagnosing electrical problems. If the vehicle is so equipped, disconnect the system to verify that these add-on accessories are not the cause of the problems.
Possible causes of vehicle problems related to aftermarket accessories include:
- Power feeds connected to points other than the battery
- Antenna location
- 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.