DTC B3788: Blower Motor Relay Control Circuit High: Notes

For wiring schematics, see BODY COMPUTER .

The Body Control Module (BCM) provides ground through circuit 247 (retailer installed accessory) to enable the after blow relay operation, the relay is located in the Instrument Panel Fuse Block (IPFB). Circuit 247 and the after blow relay are retailer installed. The BCM provides the logic to enable blower motor based on information from the Engine Control Module (ECM). The duration on the after blow is determined by A/C operation, ambient air temperature and vehicle speed.