To access them, you'll need to:
1. Remove the instrument cluster: This involves removing the bezel surrounding the cluster (usually just a few screws), then carefully disconnecting the wiring harness and speedometer cable. Consult a repair manual specific to your 1987 Chevy S10 for detailed instructions on this process. This varies slightly depending on the trim level and options.
2. Once the cluster is out: You'll see the bulbs. They are usually wedge-style bulbs and may be different sizes for different lights (e.g., speedometer illumination might be a different bulb than the fuel gauge illumination).
Important Notes:
* Repair Manual: A Haynes or Chilton repair manual for your specific year and model S10 will be invaluable. It will have diagrams and precise instructions for removing the cluster and replacing the bulbs. Attempting this without a manual could lead to damage.
* Bulb Type: Note the bulb type before removing them to ensure you buy replacements.
* Electrical Safety: Disconnect the negative battery terminal before working on the electrical system to prevent accidental shorts.
Simply searching online for "1987 Chevy S10 instrument cluster removal" will also yield many helpful videos and diagrams. However, always use a reputable source and proceed with caution.
