To find it, you'll need to:
1. Consult your owner's manual: This is the best place to start. The manual should have a diagram showing the location of relays and fuses.
2. Check the underhood fuse box: Many Cadillac models from this era had the blower motor relay located in the main fuse box under the hood. This fuse box is usually near the battery. Look carefully at the relay positions and their markings. Some might have diagrams printed on the fuse box lid itself.
3. Check the interior fuse panel: Some relays, particularly those for accessories, might be located in the interior fuse panel, often found under the dashboard. Again, check diagrams and markings within the panel.
4. Look for a separate relay center: In some cases, a separate relay center might be located somewhere else in the car, perhaps near the firewall. This is less common but possible.
Without the specific model of your 1979 Cadillac, it's impossible to give a precise location. If you can provide the model (e.g., Coupe deVille), searching online forums specific to that model year and Cadillac might yield more targeted results. Searching for "1979 Cadillac [your model] blower motor relay location" on forums like the Cadillac forums or online car communities could be helpful.
