Where is rear ac fuse for 1999 safari?

The 1999 Oldsmobile Silhouette (the equivalent of the Pontiac Safari) doesn't have a dedicated rear AC fuse. The rear air conditioning system is powered by the same electrical system as the front, and any issues with the rear AC would typically manifest as problems with the compressor clutch, blower motor, or other components, rather than a blown fuse specifically for the rear.

To troubleshoot rear AC problems in a 1999 Safari/Silhouette:

1. Check the main fuses and relays: These are usually located in the underhood fuse box and the interior fuse panel (often under the dash). Look for fuses related to the A/C system, blower motor, or compressor.

2. Inspect the wiring: Look for any damaged or loose wiring related to the rear AC system. This might involve checking the wiring harness running to the rear of the vehicle.

3. Test the compressor clutch: This requires a multimeter to check if it's receiving power when the rear AC is turned on.

4. Check the blower motor: See if the rear blower motor is getting power and if it's functioning correctly.

5. Consult a wiring diagram: A wiring diagram for your specific year and model is crucial for accurate troubleshooting. These can often be found online through repair manuals or automotive forums.

Since there's no single "rear AC fuse," a lack of rear AC is almost certainly due to a more complex electrical or mechanical problem. Professional diagnosis is recommended if you can't identify the issue using these steps.