1. Toyota Service Manuals:
* Official Toyota Website: Some Toyota models, especially newer ones, may have their manuals available for download on the official Toyota website. Check the website specific to your region.
* Authorized Toyota Dealers: You can usually purchase service manuals from authorized Toyota dealerships. These manuals will contain detailed wiring diagrams specific to your 4Runner's year, model, and trim.
2. Online Automotive Repair Resources:
* AllData DIY: This website offers access to repair and diagnostic information, including wiring diagrams, for a fee.
* AutoZone: AutoZone's website offers free access to some basic repair information, including wiring diagrams, for certain vehicles.
* Mitchell 1: Mitchell 1 provides comprehensive repair information, including wiring diagrams, for a subscription fee.
* Chilton: Similar to Mitchell 1, Chilton offers a subscription-based service with extensive repair information and wiring diagrams.
3. Other Resources:
* Online Forums: Toyota-specific forums like Toyota Nation or Club Lexus may have members who have shared wiring diagrams or have links to reliable resources.
* eBay: You may find physical service manuals or digital downloads of wiring diagrams on eBay.
Important Tips:
* Know Your 4Runner's Details: Make sure you know the year, model, and trim level of your 4Runner to ensure you are getting the correct wiring diagram.
* Check for Accuracy: Double-check the source of any wiring diagram to ensure its accuracy.
* Safety First: Always disconnect the battery before working on electrical systems, and be careful not to touch any live wires.
If you're not comfortable working with electrical systems, it's best to consult a qualified automotive technician for repairs.