Where is the heater relay on a 2004 Pontiac vibe?

The heater relay location on a 2004 Pontiac Vibe isn't consistently documented in a single, easily accessible place online. The relay location can vary depending on whether your Vibe has manual or automatic climate control. Furthermore, the relay itself might not be a dedicated "heater relay" but rather part of a larger control module or integrated within the blower motor resistor.

To find it, you'll need to:

1. Consult your owner's manual: This is the best first step. It may have a fuse and relay diagram.

2. Check the under-hood fuse box: Many relays are located here. Look for diagrams on the inside of the fuse box lid to identify relays. Pay attention to labels related to HVAC (Heating, Ventilation, and Air Conditioning) or blower motor.

3. Check the interior fuse box (if applicable): Some vehicles have a secondary fuse box inside the cabin, often under the dashboard. Again, check for diagrams.

4. Use a wiring diagram: A wiring diagram specific to your 2004 Pontiac Vibe (you'll need to specify if it's a base model or a GT) will pinpoint the relay's location. You can often find these diagrams online through repair manuals (like Haynes or Chilton) or automotive parts websites.

Important Note: Working with electrical components can be dangerous. If you're not comfortable with automotive electrical systems, it's best to take your Vibe to a qualified mechanic. Incorrectly handling relays can damage your vehicle's electrical system.